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<?php
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// $Id$
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/*
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* Session Management for PHP3
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*
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* (C) Copyright 1999-2000 NetUSE GmbH
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* Kristian Koehntopp
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*
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* $Id: template.inc,v 1.15 2004/07/23 20:36:29 layne_weathers Exp $
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*
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*/
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/*
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* Change log since version 7.2c
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*
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* Bug fixes to version 7.2c compiled by Richard Archer <rha@juggernaut.com.au>:
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* (credits given to first person to post a diff to phplib mailing list)
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*
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* Normalised all comments and whitespace (rha)
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* replaced "$handle" with "$varname" and "$h" with "$v" throughout (from phplib-devel)
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* added braces around all one-line if statements in: get_undefined, loadfile and halt (rha)
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* set_var was missing two sets of braces (rha)
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* added a couple of "return true" statements (rha)
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* set_unknowns had "keep" as default instead of "remove" (from phplib-devel)
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* set_file failed to check for empty strings if passed an array of filenames (phplib-devel)
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* remove @ from call to preg_replace in subst -- report errors if there are any (NickM)
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* set_block unnecessarily required a newline in the template file (Marc Tardif)
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* pparse now calls this->finish to replace undefined vars (Layne Weathers)
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* get_var now checks for unset varnames (NickM & rha)
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* get_var when passed an array used the array key instead of the value (rha)
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* get_vars now uses a call to get_var rather than this->varvals to prevent undefined var warning (rha)
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* in finish, the replacement string referenced an unset variable (rha)
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* loadfile would try to load a file if the varval had been set to "" (rha)
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* in get_undefined, only match non-whitespace in variable tags as in finish (Layne Weathers & rha)
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* more elegant fix to the problem of subst stripping '$n', '\n' and '\\' strings (rha)
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* parse uses get_var to obtain return value (Jordi via SF)
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* set_block reports an error if the block could not be extracted (rha)
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* filename is now windows-pathname aware (krabu @ SF)
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*
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*
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* Changes in functionality which go beyond bug fixes:
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*
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* added ability for filename comments to be output (from phplib-users layne)
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* changed debug handling so set, get and internals can be tracked separately (rha)
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* added debug statements throughout to track most function calls (rha)
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* debug output contained raw HTML -- is now escaped with htmlentities (rha)
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* Alter regex in set_block to remove more whitespace around BEGIN/END tags to improve HTML layout (rha)
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* Add "append" option to set_var, works just like append in parse (dale at linuxwebpro.com, rha)
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* Altered parse so that append is honored if passed an array (Brian)
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* Converted comments and documentation to phpdoc style (rha)
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* Added clear_var to set the value of variables to "" (rha)
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* Added unset_var to usset variables (rha)
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*
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*/
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/**
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* The template class allows you to keep your HTML code in some external files
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* which are completely free of PHP code, but contain replacement fields.
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* The class provides you with functions which can fill in the replacement fields
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* with arbitrary strings. These strings can become very large, e.g. entire tables.
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*
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* Note: If you think that this is like FastTemplates, read carefully. It isn't.
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*
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*/
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class Template
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{
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/**
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* Serialization helper, the name of this class.
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*
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* @var string
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* @access public
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*/
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var $classname = "Template";
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/**
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* Determines how much debugging output Template will produce.
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* This is a bitwise mask of available debug levels:
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* 0 = no debugging
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* 1 = debug variable assignments
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* 2 = debug calls to get variable
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* 4 = debug internals (outputs all function calls with parameters).
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*
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* Note: setting $this->debug = true will enable debugging of variable
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* assignments only which is the same behaviour as versions up to release 7.2d.
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*
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* @var int
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* @access public
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*/
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var $debug = false;
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/**
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* Determines whether Template outputs filename comments.
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* false = no filename outputs
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* true = HTML comments (e.g. <!-- START FILE $filename -->) placed in output
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*
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* @var int
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* @access public
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*/
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var $filename_comments = false;
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/**
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* Determines the regular expression used to find unknown variable tags.
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* "loose" = traditional match all curly braces with no whitespace between
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* "strict" = adopts PHP's variable naming rules
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* ("loose" has a nasty habit of deleting JavaScript RegEx components)
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* (should future major version releases of PHPLib default this "strict"?)
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*
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* @var string
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* @access public
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*/
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var $unknown_regexp = "loose";
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/**
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* The base directory from which template files are loaded.
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*
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* @var string
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* @access private
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* @see set_root
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*/
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var $root = ".";
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/**
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* A hash of strings forming a translation table which translates variable names
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* into names of files containing the variable content.
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* $file[varname] = "filename";
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*
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* @var array
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* @access private
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* @see set_file
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*/
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var $file = array();
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/**
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* A hash of strings forming a translation table which translates variable names
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* into regular expressions for themselves.
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* $varkeys[varname] = "/varname/"
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*
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* @var array
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* @access private
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* @see set_var
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*/
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var $varkeys = array();
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/**
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* A hash of strings forming a translation table which translates variable names
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* into values for their respective varkeys.
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* $varvals[varname] = "value"
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*
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* @var array
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* @access private
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* @see set_var
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*/
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var $varvals = array();
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/**
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* Determines how to output variable tags with no assigned value in templates.
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*
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* @var string
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* @access private
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* @see set_unknowns
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*/
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var $unknowns = "remove";
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/**
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* Determines how Template handles error conditions.
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* "yes" = the error is reported, then execution is halted
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* "report" = the error is reported, then execution continues by returning "false"
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* "no" = errors are silently ignored, and execution resumes reporting "false"
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*
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* @var string
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* @access public
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* @see halt
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*/
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var $halt_on_error = "yes";
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/**
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* The last error message is retained in this variable.
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*
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* @var string
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* @access public
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* @see halt
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*/
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var $last_error = "";
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/******************************************************************************
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* Class constructor. May be called with two optional parameters.
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* The first parameter sets the template directory the second parameter
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* sets the policy regarding handling of unknown variables.
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*
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* usage: Template([string $root = "."], [string $unknowns = "remove"])
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*
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* @param $root path to template directory
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* @param $string what to do with undefined variables
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* @see set_root
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* @see set_unknowns
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* @access public
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* @return void
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*/
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function Template($root = ".", $unknowns = "remove") {
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if ($this->debug & 4) {
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echo "<p><b>Template:</b> root = $root, unknowns = $unknowns</p>\n";
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}
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$this->set_root($root);
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$this->set_unknowns($unknowns);
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}
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/******************************************************************************
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* Checks that $root is a valid directory and if so sets this directory as the
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* base directory from which templates are loaded by storing the value in
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* $this->root. Relative filenames are prepended with the path in $this->root.
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*
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* Returns true on success, false on error.
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*
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* usage: set_root(string $root)
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*
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* @param $root string containing new template directory
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* @see root
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* @access public
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* @return boolean
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*/
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function set_root($root) {
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if(ereg('/$', $root)) {
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$root = substr($root, 0, -1);
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}
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if ($this->debug & 4) {
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echo "<p><b>set_root:</b> root = $root</p>\n";
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}
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if (!is_dir($root)) {
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$this->halt("set_root: $root is not a directory.");
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return false;
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}
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$this->root = $root;
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return true;
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}
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/******************************************************************************
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* Sets the policy for dealing with unresolved variable names.
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*
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* unknowns defines what to do with undefined template variables
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* "remove" = remove undefined variables
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* "comment" = replace undefined variables with comments
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* "keep" = keep undefined variables
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*
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* Note: "comment" can cause unexpected results when the variable tag is embedded
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* inside an HTML tag, for example a tag which is expected to be replaced with a URL.
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*
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* usage: set_unknowns(string $unknowns)
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*
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* @param $unknowns new value for unknowns
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* @see unknowns
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* @access public
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* @return void
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*/
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function set_unknowns($unknowns = "remove") {
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if ($this->debug & 4) {
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echo "<p><b>unknowns:</b> unknowns = $unknowns</p>\n";
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}
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$this->unknowns = $unknowns;
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}
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/******************************************************************************
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* Defines a filename for the initial value of a variable.
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*
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* It may be passed either a varname and a file name as two strings or
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* a hash of strings with the key being the varname and the value
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* being the file name.
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*
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* The new mappings are stored in the array $this->file.
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* The files are not loaded yet, but only when needed.
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*
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* Returns true on success, false on error.
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*
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* usage: set_file(array $filelist = (string $varname => string $filename))
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* or
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* usage: set_file(string $varname, string $filename)
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*
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* @param $varname either a string containing a varname or a hash of varname/file name pairs.
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* @param $filename if varname is a string this is the filename otherwise filename is not required
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* @access public
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* @return boolean
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*/
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function set_file($varname, $filename = "") {
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if (!is_array($varname)) {
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if ($this->debug & 4) {
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echo "<p><b>set_file:</b> (with scalar) varname = $varname, filename = $filename</p>\n";
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}
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if ($filename == "") {
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$this->halt("set_file: For varname $varname filename is empty.");
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return false;
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297
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}
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$this->file[$varname] = $this->filename($filename);
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} else {
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reset($varname);
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301
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while (list($v, $f) = each($varname)) {
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if ($this->debug & 4) {
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echo "<p><b>set_file:</b> (with array) varname = $v, filename = $f</p>\n";
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}
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if ($f == "") {
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$this->halt("set_file: For varname $v filename is empty.");
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return false;
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}
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$this->file[$v] = $this->filename($f);
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}
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}
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312
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return true;
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313
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}
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314
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315
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316
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/******************************************************************************
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317
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* A variable $parent may contain a variable block defined by:
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318
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* <!-- BEGIN $varname --> content <!-- END $varname -->. This function removes
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319
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* that block from $parent and replaces it with a variable reference named $name.
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* The block is inserted into the varkeys and varvals hashes. If $name is
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* omitted, it is assumed to be the same as $varname.
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*
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* Blocks may be nested but care must be taken to extract the blocks in order
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* from the innermost block to the outermost block.
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*
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* Returns true on success, false on error.
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327
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*
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328
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* usage: set_block(string $parent, string $varname, [string $name = ""])
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329
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*
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330
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* @param $parent a string containing the name of the parent variable
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331
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* @param $varname a string containing the name of the block to be extracted
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332
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* @param $name the name of the variable in which to store the block
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* @access public
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334
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* @return boolean
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335
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*/
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336
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function set_block($parent, $varname, $name = "") {
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337
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if ($this->debug & 4) {
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echo "<p><b>set_block:</b> parent = $parent, varname = $varname, name = $name</p>\n";
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339
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}
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340
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if (!$this->loadfile($parent)) {
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341
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$this->halt("set_block: unable to load $parent.");
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342
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return false;
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343
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}
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344
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if ($name == "") {
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345
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$name = $varname;
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346
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}
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347
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348
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$str = $this->get_var($parent);
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349
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$reg = "/[ \t]*<!--\s+BEGIN $varname\s+-->\s*?\n?(\s*.*?\n?)\s*<!--\s+END $varname\s+-->\s*?\n?/sm";
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350
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preg_match_all($reg, $str, $m);
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351
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/* workaround to avoid problems with some WB files/modules (e.g. massmail)
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352
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if (!isset($m[1][0])) {
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$this->halt("set_block: unable to set block $varname.");
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return false;
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355
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}
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356
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*/
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357
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$str = preg_replace($reg, "{" . $name . "}", $str);
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358
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@$this->set_var($varname, $m[1][0]);
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$this->set_var($parent, $str);
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return true;
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361
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}
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362
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363
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364
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/******************************************************************************
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365
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* This functions sets the value of a variable.
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366
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*
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367
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* It may be called with either a varname and a value as two strings or an
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368
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* an associative array with the key being the varname and the value being
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369
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* the new variable value.
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370
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*
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371
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* The function inserts the new value of the variable into the $varkeys and
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372
|
* $varvals hashes. It is not necessary for a variable to exist in these hashes
|
|
373
|
* before calling this function.
|
|
374
|
*
|
|
375
|
* An optional third parameter allows the value for each varname to be appended
|
|
376
|
* to the existing variable instead of replacing it. The default is to replace.
|
|
377
|
* This feature was introduced after the 7.2d release.
|
|
378
|
*
|
|
379
|
*
|
|
380
|
* usage: set_var(string $varname, [string $value = ""], [boolean $append = false])
|
|
381
|
* or
|
|
382
|
* usage: set_var(array $varname = (string $varname => string $value), [mixed $dummy_var], [boolean $append = false])
|
|
383
|
*
|
|
384
|
* @param $varname either a string containing a varname or a hash of varname/value pairs.
|
|
385
|
* @param $value if $varname is a string this contains the new value for the variable otherwise this parameter is ignored
|
|
386
|
* @param $append if true, the value is appended to the variable's existing value
|
|
387
|
* @access public
|
|
388
|
* @return void
|
|
389
|
*/
|
|
390
|
function set_var($varname, $value = "", $append = false) {
|
|
391
|
if (!is_array($varname)) {
|
|
392
|
if (!empty($varname)) {
|
|
393
|
if ($this->debug & 1) {
|
|
394
|
printf("<b>set_var:</b> (with scalar) <b>%s</b> = '%s'<br>\n", $varname, htmlentities($value));
|
|
395
|
}
|
|
396
|
$this->varkeys[$varname] = "/".$this->varname($varname)."/";
|
|
397
|
if ($append && isset($this->varvals[$varname])) {
|
|
398
|
$this->varvals[$varname] .= $value;
|
|
399
|
} else {
|
|
400
|
$this->varvals[$varname] = $value;
|
|
401
|
}
|
|
402
|
}
|
|
403
|
} else {
|
|
404
|
reset($varname);
|
|
405
|
while (list($k, $v) = each($varname)) {
|
|
406
|
if (!empty($k)) {
|
|
407
|
if ($this->debug & 1) {
|
|
408
|
printf("<b>set_var:</b> (with array) <b>%s</b> = '%s'<br>\n", $k, htmlentities($v));
|
|
409
|
}
|
|
410
|
$this->varkeys[$k] = "/".$this->varname($k)."/";
|
|
411
|
if ($append && isset($this->varvals[$k])) {
|
|
412
|
$this->varvals[$k] .= $v;
|
|
413
|
} else {
|
|
414
|
$this->varvals[$k] = $v;
|
|
415
|
}
|
|
416
|
}
|
|
417
|
}
|
|
418
|
}
|
|
419
|
}
|
|
420
|
|
|
421
|
|
|
422
|
/******************************************************************************
|
|
423
|
* This functions clears the value of a variable.
|
|
424
|
*
|
|
425
|
* It may be called with either a varname as a string or an array with the
|
|
426
|
* values being the varnames to be cleared.
|
|
427
|
*
|
|
428
|
* The function sets the value of the variable in the $varkeys and $varvals
|
|
429
|
* hashes to "". It is not necessary for a variable to exist in these hashes
|
|
430
|
* before calling this function.
|
|
431
|
*
|
|
432
|
*
|
|
433
|
* usage: clear_var(string $varname)
|
|
434
|
* or
|
|
435
|
* usage: clear_var(array $varname = (string $varname))
|
|
436
|
*
|
|
437
|
* @param $varname either a string containing a varname or an array of varnames.
|
|
438
|
* @access public
|
|
439
|
* @return void
|
|
440
|
*/
|
|
441
|
function clear_var($varname) {
|
|
442
|
if (!is_array($varname)) {
|
|
443
|
if (!empty($varname)) {
|
|
444
|
if ($this->debug & 1) {
|
|
445
|
printf("<b>clear_var:</b> (with scalar) <b>%s</b><br>\n", $varname);
|
|
446
|
}
|
|
447
|
$this->set_var($varname, "");
|
|
448
|
}
|
|
449
|
} else {
|
|
450
|
reset($varname);
|
|
451
|
while (list($k, $v) = each($varname)) {
|
|
452
|
if (!empty($v)) {
|
|
453
|
if ($this->debug & 1) {
|
|
454
|
printf("<b>clear_var:</b> (with array) <b>%s</b><br>\n", $v);
|
|
455
|
}
|
|
456
|
$this->set_var($v, "");
|
|
457
|
}
|
|
458
|
}
|
|
459
|
}
|
|
460
|
}
|
|
461
|
|
|
462
|
|
|
463
|
/******************************************************************************
|
|
464
|
* This functions unsets a variable completely.
|
|
465
|
*
|
|
466
|
* It may be called with either a varname as a string or an array with the
|
|
467
|
* values being the varnames to be cleared.
|
|
468
|
*
|
|
469
|
* The function removes the variable from the $varkeys and $varvals hashes.
|
|
470
|
* It is not necessary for a variable to exist in these hashes before calling
|
|
471
|
* this function.
|
|
472
|
*
|
|
473
|
*
|
|
474
|
* usage: unset_var(string $varname)
|
|
475
|
* or
|
|
476
|
* usage: unset_var(array $varname = (string $varname))
|
|
477
|
*
|
|
478
|
* @param $varname either a string containing a varname or an array of varnames.
|
|
479
|
* @access public
|
|
480
|
* @return void
|
|
481
|
*/
|
|
482
|
function unset_var($varname) {
|
|
483
|
if (!is_array($varname)) {
|
|
484
|
if (!empty($varname)) {
|
|
485
|
if ($this->debug & 1) {
|
|
486
|
printf("<b>unset_var:</b> (with scalar) <b>%s</b><br>\n", $varname);
|
|
487
|
}
|
|
488
|
unset($this->varkeys[$varname]);
|
|
489
|
unset($this->varvals[$varname]);
|
|
490
|
}
|
|
491
|
} else {
|
|
492
|
reset($varname);
|
|
493
|
while (list($k, $v) = each($varname)) {
|
|
494
|
if (!empty($v)) {
|
|
495
|
if ($this->debug & 1) {
|
|
496
|
printf("<b>unset_var:</b> (with array) <b>%s</b><br>\n", $v);
|
|
497
|
}
|
|
498
|
unset($this->varkeys[$v]);
|
|
499
|
unset($this->varvals[$v]);
|
|
500
|
}
|
|
501
|
}
|
|
502
|
}
|
|
503
|
}
|
|
504
|
|
|
505
|
|
|
506
|
/******************************************************************************
|
|
507
|
* This function fills in all the variables contained within the variable named
|
|
508
|
* $varname. The resulting value is returned as the function result and the
|
|
509
|
* original value of the variable varname is not changed. The resulting string
|
|
510
|
* is not "finished", that is, the unresolved variable name policy has not been
|
|
511
|
* applied yet.
|
|
512
|
*
|
|
513
|
* Returns: the value of the variable $varname with all variables substituted.
|
|
514
|
*
|
|
515
|
* usage: subst(string $varname)
|
|
516
|
*
|
|
517
|
* @param $varname the name of the variable within which variables are to be substituted
|
|
518
|
* @access public
|
|
519
|
* @return string
|
|
520
|
*/
|
|
521
|
function subst($varname) {
|
|
522
|
$varvals_quoted = array();
|
|
523
|
if ($this->debug & 4) {
|
|
524
|
echo "<p><b>subst:</b> varname = $varname</p>\n";
|
|
525
|
}
|
|
526
|
if (!$this->loadfile($varname)) {
|
|
527
|
$this->halt("subst: unable to load $varname.");
|
|
528
|
return false;
|
|
529
|
}
|
|
530
|
|
|
531
|
// quote the replacement strings to prevent bogus stripping of special chars
|
|
532
|
reset($this->varvals);
|
|
533
|
while (list($k, $v) = each($this->varvals)) {
|
|
534
|
$varvals_quoted[$k] = preg_replace(array('/\\\\/', '/\$/'), array('\\\\\\\\', '\\\\$'), $v);
|
|
535
|
}
|
|
536
|
|
|
537
|
$str = $this->get_var($varname);
|
|
538
|
$str = preg_replace($this->varkeys, $varvals_quoted, $str);
|
|
539
|
return $str;
|
|
540
|
}
|
|
541
|
|
|
542
|
|
|
543
|
/******************************************************************************
|
|
544
|
* This is shorthand for print $this->subst($varname). See subst for further
|
|
545
|
* details.
|
|
546
|
*
|
|
547
|
* Returns: always returns false.
|
|
548
|
*
|
|
549
|
* usage: psubst(string $varname)
|
|
550
|
*
|
|
551
|
* @param $varname the name of the variable within which variables are to be substituted
|
|
552
|
* @access public
|
|
553
|
* @return false
|
|
554
|
* @see subst
|
|
555
|
*/
|
|
556
|
function psubst($varname) {
|
|
557
|
if ($this->debug & 4) {
|
|
558
|
echo "<p><b>psubst:</b> varname = $varname</p>\n";
|
|
559
|
}
|
|
560
|
print $this->subst($varname);
|
|
561
|
|
|
562
|
return false;
|
|
563
|
}
|
|
564
|
|
|
565
|
|
|
566
|
/******************************************************************************
|
|
567
|
* The function substitutes the values of all defined variables in the variable
|
|
568
|
* named $varname and stores or appends the result in the variable named $target.
|
|
569
|
*
|
|
570
|
* It may be called with either a target and a varname as two strings or a
|
|
571
|
* target as a string and an array of variable names in varname.
|
|
572
|
*
|
|
573
|
* The function inserts the new value of the variable into the $varkeys and
|
|
574
|
* $varvals hashes. It is not necessary for a variable to exist in these hashes
|
|
575
|
* before calling this function.
|
|
576
|
*
|
|
577
|
* An optional third parameter allows the value for each varname to be appended
|
|
578
|
* to the existing target variable instead of replacing it. The default is to
|
|
579
|
* replace.
|
|
580
|
*
|
|
581
|
* If $target and $varname are both strings, the substituted value of the
|
|
582
|
* variable $varname is inserted into or appended to $target.
|
|
583
|
*
|
|
584
|
* If $handle is an array of variable names the variables named by $handle are
|
|
585
|
* sequentially substituted and the result of each substitution step is
|
|
586
|
* inserted into or appended to in $target. The resulting substitution is
|
|
587
|
* available in the variable named by $target, as is each intermediate step
|
|
588
|
* for the next $varname in sequence. Note that while it is possible, it
|
|
589
|
* is only rarely desirable to call this function with an array of varnames
|
|
590
|
* and with $append = true. This append feature was introduced after the 7.2d
|
|
591
|
* release.
|
|
592
|
*
|
|
593
|
* Returns: the last value assigned to $target.
|
|
594
|
*
|
|
595
|
* usage: parse(string $target, string $varname, [boolean $append])
|
|
596
|
* or
|
|
597
|
* usage: parse(string $target, array $varname = (string $varname), [boolean $append])
|
|
598
|
*
|
|
599
|
* @param $target a string containing the name of the variable into which substituted $varnames are to be stored
|
|
600
|
* @param $varname if a string, the name the name of the variable to substitute or if an array a list of variables to be substituted
|
|
601
|
* @param $append if true, the substituted variables are appended to $target otherwise the existing value of $target is replaced
|
|
602
|
* @access public
|
|
603
|
* @return string
|
|
604
|
* @see subst
|
|
605
|
*/
|
|
606
|
function parse($target, $varname, $append = false) {
|
|
607
|
if (!is_array($varname)) {
|
|
608
|
if ($this->debug & 4) {
|
|
609
|
echo "<p><b>parse:</b> (with scalar) target = $target, varname = $varname, append = $append</p>\n";
|
|
610
|
}
|
|
611
|
$str = $this->subst($varname);
|
|
612
|
if ($append) {
|
|
613
|
$this->set_var($target, $this->get_var($target) . $str);
|
|
614
|
} else {
|
|
615
|
$this->set_var($target, $str);
|
|
616
|
}
|
|
617
|
} else {
|
|
618
|
reset($varname);
|
|
619
|
while (list($i, $v) = each($varname)) {
|
|
620
|
if ($this->debug & 4) {
|
|
621
|
echo "<p><b>parse:</b> (with array) target = $target, i = $i, varname = $v, append = $append</p>\n";
|
|
622
|
}
|
|
623
|
$str = $this->subst($v);
|
|
624
|
if ($append) {
|
|
625
|
$this->set_var($target, $this->get_var($target) . $str);
|
|
626
|
} else {
|
|
627
|
$this->set_var($target, $str);
|
|
628
|
}
|
|
629
|
}
|
|
630
|
}
|
|
631
|
|
|
632
|
if ($this->debug & 4) {
|
|
633
|
echo "<p><b>parse:</b> completed</p>\n";
|
|
634
|
}
|
|
635
|
return $this->get_var($target);
|
|
636
|
}
|
|
637
|
|
|
638
|
|
|
639
|
/******************************************************************************
|
|
640
|
* This is shorthand for print $this->parse(...) and is functionally identical.
|
|
641
|
* See parse for further details.
|
|
642
|
*
|
|
643
|
* Returns: always returns false.
|
|
644
|
*
|
|
645
|
* usage: pparse(string $target, string $varname, [boolean $append])
|
|
646
|
* or
|
|
647
|
* usage: pparse(string $target, array $varname = (string $varname), [boolean $append])
|
|
648
|
*
|
|
649
|
* @param $target a string containing the name of the variable into which substituted $varnames are to be stored
|
|
650
|
* @param $varname if a string, the name the name of the variable to substitute or if an array a list of variables to be substituted
|
|
651
|
* @param $append if true, the substituted variables are appended to $target otherwise the existing value of $target is replaced
|
|
652
|
* @access public
|
|
653
|
* @return false
|
|
654
|
* @see parse
|
|
655
|
*/
|
|
656
|
function pparse($target, $varname, $append = false) {
|
|
657
|
if ($this->debug & 4) {
|
|
658
|
echo "<p><b>pparse:</b> passing parameters to parse...</p>\n";
|
|
659
|
}
|
|
660
|
print $this->finish($this->parse($target, $varname, $append));
|
|
661
|
return false;
|
|
662
|
}
|
|
663
|
|
|
664
|
|
|
665
|
/******************************************************************************
|
|
666
|
* This function returns an associative array of all defined variables with the
|
|
667
|
* name as the key and the value of the variable as the value.
|
|
668
|
*
|
|
669
|
* This is mostly useful for debugging. Also note that $this->debug can be used
|
|
670
|
* to echo all variable assignments as they occur and to trace execution.
|
|
671
|
*
|
|
672
|
* Returns: a hash of all defined variable values keyed by their names.
|
|
673
|
*
|
|
674
|
* usage: get_vars()
|
|
675
|
*
|
|
676
|
* @access public
|
|
677
|
* @return array
|
|
678
|
* @see $debug
|
|
679
|
*/
|
|
680
|
function get_vars() {
|
|
681
|
if ($this->debug & 4) {
|
|
682
|
echo "<p><b>get_vars:</b> constructing array of vars...</p>\n";
|
|
683
|
}
|
|
684
|
reset($this->varkeys);
|
|
685
|
while (list($k, $v) = each($this->varkeys)) {
|
|
686
|
$result[$k] = $this->get_var($k);
|
|
687
|
}
|
|
688
|
return $result;
|
|
689
|
}
|
|
690
|
|
|
691
|
|
|
692
|
/******************************************************************************
|
|
693
|
* This function returns the value of the variable named by $varname.
|
|
694
|
* If $varname references a file and that file has not been loaded yet, the
|
|
695
|
* variable will be reported as empty.
|
|
696
|
*
|
|
697
|
* When called with an array of variable names this function will return a a
|
|
698
|
* hash of variable values keyed by their names.
|
|
699
|
*
|
|
700
|
* Returns: a string or an array containing the value of $varname.
|
|
701
|
*
|
|
702
|
* usage: get_var(string $varname)
|
|
703
|
* or
|
|
704
|
* usage: get_var(array $varname)
|
|
705
|
*
|
|
706
|
* @param $varname if a string, the name the name of the variable to get the value of, or if an array a list of variables to return the value of
|
|
707
|
* @access public
|
|
708
|
* @return string or array
|
|
709
|
*/
|
|
710
|
function get_var($varname) {
|
|
711
|
if (!is_array($varname)) {
|
|
712
|
if (isset($this->varvals[$varname])) {
|
|
713
|
$str = $this->varvals[$varname];
|
|
714
|
} else {
|
|
715
|
$str = "";
|
|
716
|
}
|
|
717
|
if ($this->debug & 2) {
|
|
718
|
printf ("<b>get_var</b> (with scalar) <b>%s</b> = '%s'<br>\n", $varname, htmlentities($str));
|
|
719
|
}
|
|
720
|
return $str;
|
|
721
|
} else {
|
|
722
|
reset($varname);
|
|
723
|
while (list($k, $v) = each($varname)) {
|
|
724
|
if (isset($this->varvals[$v])) {
|
|
725
|
$str = $this->varvals[$v];
|
|
726
|
} else {
|
|
727
|
$str = "";
|
|
728
|
}
|
|
729
|
if ($this->debug & 2) {
|
|
730
|
printf ("<b>get_var:</b> (with array) <b>%s</b> = '%s'<br>\n", $v, htmlentities($str));
|
|
731
|
}
|
|
732
|
$result[$v] = $str;
|
|
733
|
}
|
|
734
|
return $result;
|
|
735
|
}
|
|
736
|
}
|
|
737
|
|
|
738
|
|
|
739
|
/******************************************************************************
|
|
740
|
* This function returns a hash of unresolved variable names in $varname, keyed
|
|
741
|
* by their names (that is, the hash has the form $a[$name] = $name).
|
|
742
|
*
|
|
743
|
* Returns: a hash of varname/varname pairs or false on error.
|
|
744
|
*
|
|
745
|
* usage: get_undefined(string $varname)
|
|
746
|
*
|
|
747
|
* @param $varname a string containing the name the name of the variable to scan for unresolved variables
|
|
748
|
* @access public
|
|
749
|
* @return array
|
|
750
|
*/
|
|
751
|
function get_undefined($varname) {
|
|
752
|
if ($this->debug & 4) {
|
|
753
|
echo "<p><b>get_undefined:</b> varname = $varname</p>\n";
|
|
754
|
}
|
|
755
|
if (!$this->loadfile($varname)) {
|
|
756
|
$this->halt("get_undefined: unable to load $varname.");
|
|
757
|
return false;
|
|
758
|
}
|
|
759
|
|
|
760
|
preg_match_all(
|
|
761
|
(("loose" == $this->unknown_regexp) ? "/{([^ \t\r\n}]+)}/" : "/{([_a-zA-Z]\\w+)}/"),
|
|
762
|
$this->get_var($varname),
|
|
763
|
$m);
|
|
764
|
$m = $m[1];
|
|
765
|
if (!is_array($m)) {
|
|
766
|
return false;
|
|
767
|
}
|
|
768
|
|
|
769
|
reset($m);
|
|
770
|
while (list($k, $v) = each($m)) {
|
|
771
|
if (!isset($this->varkeys[$v])) {
|
|
772
|
if ($this->debug & 4) {
|
|
773
|
echo "<p><b>get_undefined:</b> undefined: $v</p>\n";
|
|
774
|
}
|
|
775
|
$result[$v] = $v;
|
|
776
|
}
|
|
777
|
}
|
|
778
|
|
|
779
|
if (count($result)) {
|
|
780
|
return $result;
|
|
781
|
} else {
|
|
782
|
return false;
|
|
783
|
}
|
|
784
|
}
|
|
785
|
|
|
786
|
|
|
787
|
/******************************************************************************
|
|
788
|
* This function returns the finished version of $str. That is, the policy
|
|
789
|
* regarding unresolved variable names will be applied to $str.
|
|
790
|
*
|
|
791
|
* Returns: a finished string derived from $str and $this->unknowns.
|
|
792
|
*
|
|
793
|
* usage: finish(string $str)
|
|
794
|
*
|
|
795
|
* @param $str a string to which to apply the unresolved variable policy
|
|
796
|
* @access public
|
|
797
|
* @return string
|
|
798
|
* @see set_unknowns
|
|
799
|
*/
|
|
800
|
function finish($str) {
|
|
801
|
switch ($this->unknowns) {
|
|
802
|
case "keep":
|
|
803
|
break;
|
|
804
|
|
|
805
|
case "remove":
|
|
806
|
$str = preg_replace(
|
|
807
|
(("loose" == $this->unknown_regexp) ? "/{([^ \t\r\n}]+)}/" : "/{([_a-zA-Z]\\w+)}/"),
|
|
808
|
"",
|
|
809
|
$str);
|
|
810
|
break;
|
|
811
|
|
|
812
|
case "comment":
|
|
813
|
$str = preg_replace(
|
|
814
|
(("loose" == $this->unknown_regexp) ? "/{([^ \t\r\n}]+)}/" : "/{([_a-zA-Z]\\w+)}/"),
|
|
815
|
"<!-- Template variable \\1 undefined -->",
|
|
816
|
$str);
|
|
817
|
break;
|
|
818
|
}
|
|
819
|
|
|
820
|
return $str;
|
|
821
|
}
|
|
822
|
|
|
823
|
|
|
824
|
/******************************************************************************
|
|
825
|
* This function prints the finished version of the value of the variable named
|
|
826
|
* by $varname. That is, the policy regarding unresolved variable names will be
|
|
827
|
* applied to the variable $varname then it will be printed.
|
|
828
|
*
|
|
829
|
* usage: p(string $varname)
|
|
830
|
*
|
|
831
|
* @param $varname a string containing the name of the variable to finish and print
|
|
832
|
* @access public
|
|
833
|
* @return void
|
|
834
|
* @see set_unknowns
|
|
835
|
* @see finish
|
|
836
|
*/
|
|
837
|
function p($varname) {
|
|
838
|
print $this->finish($this->get_var($varname));
|
|
839
|
}
|
|
840
|
|
|
841
|
|
|
842
|
/******************************************************************************
|
|
843
|
* This function returns the finished version of the value of the variable named
|
|
844
|
* by $varname. That is, the policy regarding unresolved variable names will be
|
|
845
|
* applied to the variable $varname and the result returned.
|
|
846
|
*
|
|
847
|
* Returns: a finished string derived from the variable $varname.
|
|
848
|
*
|
|
849
|
* usage: get(string $varname)
|
|
850
|
*
|
|
851
|
* @param $varname a string containing the name of the variable to finish
|
|
852
|
* @access public
|
|
853
|
* @return void
|
|
854
|
* @see set_unknowns
|
|
855
|
* @see finish
|
|
856
|
*/
|
|
857
|
function get($varname) {
|
|
858
|
return $this->finish($this->get_var($varname));
|
|
859
|
}
|
|
860
|
|
|
861
|
|
|
862
|
/******************************************************************************
|
|
863
|
* When called with a relative pathname, this function will return the pathname
|
|
864
|
* with $this->root prepended. Absolute pathnames are returned unchanged.
|
|
865
|
*
|
|
866
|
* Returns: a string containing an absolute pathname.
|
|
867
|
*
|
|
868
|
* usage: filename(string $filename)
|
|
869
|
*
|
|
870
|
* @param $filename a string containing a filename
|
|
871
|
* @access private
|
|
872
|
* @return string
|
|
873
|
* @see set_root
|
|
874
|
*/
|
|
875
|
function filename($filename) {
|
|
876
|
if ($this->debug & 4) {
|
|
877
|
echo "<p><b>filename:</b> filename = $filename</p>\n";
|
|
878
|
}
|
|
879
|
if (substr($filename, 0, 1) != "/"
|
|
880
|
&& substr($filename, 0, 1) != "\\"
|
|
881
|
&& substr($filename, 1, 2) != ":\\"
|
|
882
|
&& substr($filename, 1, 2) != ":/"
|
|
883
|
) {
|
|
884
|
$filename = $this->root."/".$filename;
|
|
885
|
}
|
|
886
|
|
|
887
|
if (!file_exists($filename)) {
|
|
888
|
$this->halt("filename: file $filename does not exist.");
|
|
889
|
}
|
|
890
|
return $filename;
|
|
891
|
}
|
|
892
|
|
|
893
|
|
|
894
|
/******************************************************************************
|
|
895
|
* This function will construct a regexp for a given variable name with any
|
|
896
|
* special chars quoted.
|
|
897
|
*
|
|
898
|
* Returns: a string containing an escaped variable name.
|
|
899
|
*
|
|
900
|
* usage: varname(string $varname)
|
|
901
|
*
|
|
902
|
* @param $varname a string containing a variable name
|
|
903
|
* @access private
|
|
904
|
* @return string
|
|
905
|
*/
|
|
906
|
function varname($varname) {
|
|
907
|
return preg_quote("{" . $varname . "}");
|
|
908
|
}
|
|
909
|
|
|
910
|
|
|
911
|
/******************************************************************************
|
|
912
|
* If a variable's value is undefined and the variable has a filename stored in
|
|
913
|
* $this->file[$varname] then the backing file will be loaded and the file's
|
|
914
|
* contents will be assigned as the variable's value.
|
|
915
|
*
|
|
916
|
* Note that the behaviour of this function changed slightly after the 7.2d
|
|
917
|
* release. Where previously a variable was reloaded from file if the value
|
|
918
|
* was empty, now this is not done. This allows a variable to be loaded then
|
|
919
|
* set to "", and also prevents attempts to load empty variables. Files are
|
|
920
|
* now only loaded if $this->varvals[$varname] is unset.
|
|
921
|
*
|
|
922
|
* Returns: true on success, false on error.
|
|
923
|
*
|
|
924
|
* usage: loadfile(string $varname)
|
|
925
|
*
|
|
926
|
* @param $varname a string containing the name of a variable to load
|
|
927
|
* @access private
|
|
928
|
* @return boolean
|
|
929
|
* @see set_file
|
|
930
|
*/
|
|
931
|
function loadfile($varname) {
|
|
932
|
if ($this->debug & 4) {
|
|
933
|
echo "<p><b>loadfile:</b> varname = $varname</p>\n";
|
|
934
|
}
|
|
935
|
|
|
936
|
if (!isset($this->file[$varname])) {
|
|
937
|
// $varname does not reference a file so return
|
|
938
|
if ($this->debug & 4) {
|
|
939
|
echo "<p><b>loadfile:</b> varname $varname does not reference a file</p>\n";
|
|
940
|
}
|
|
941
|
return true;
|
|
942
|
}
|
|
943
|
|
|
944
|
if (isset($this->varvals[$varname])) {
|
|
945
|
// will only be unset if varname was created with set_file and has never been loaded
|
|
946
|
// $varname has already been loaded so return
|
|
947
|
if ($this->debug & 4) {
|
|
948
|
echo "<p><b>loadfile:</b> varname $varname is already loaded</p>\n";
|
|
949
|
}
|
|
950
|
return true;
|
|
951
|
}
|
|
952
|
$filename = $this->file[$varname];
|
|
953
|
|
|
954
|
/* use @file here to avoid leaking filesystem information if there is an error */
|
|
955
|
$str = implode("", @file($filename));
|
|
956
|
if (empty($str)) {
|
|
957
|
$this->halt("loadfile: While loading $varname, $filename does not exist or is empty.");
|
|
958
|
return false;
|
|
959
|
}
|
|
960
|
|
|
961
|
if ($this->filename_comments) {
|
|
962
|
$str = "<!-- START FILE $filename -->\n$str<!-- END FILE $filename -->\n";
|
|
963
|
}
|
|
964
|
if ($this->debug & 4) {
|
|
965
|
printf("<b>loadfile:</b> loaded $filename into $varname<br>\n");
|
|
966
|
}
|
|
967
|
$this->set_var($varname, $str);
|
|
968
|
|
|
969
|
return true;
|
|
970
|
}
|
|
971
|
|
|
972
|
|
|
973
|
/******************************************************************************
|
|
974
|
* This function is called whenever an error occurs and will handle the error
|
|
975
|
* according to the policy defined in $this->halt_on_error. Additionally the
|
|
976
|
* error message will be saved in $this->last_error.
|
|
977
|
*
|
|
978
|
* Returns: always returns false.
|
|
979
|
*
|
|
980
|
* usage: halt(string $msg)
|
|
981
|
*
|
|
982
|
* @param $msg a string containing an error message
|
|
983
|
* @access private
|
|
984
|
* @return void
|
|
985
|
* @see $halt_on_error
|
|
986
|
*/
|
|
987
|
function halt($msg) {
|
|
988
|
$this->last_error = $msg;
|
|
989
|
|
|
990
|
if ($this->halt_on_error != "no") {
|
|
991
|
$this->haltmsg($msg);
|
|
992
|
}
|
|
993
|
|
|
994
|
if ($this->halt_on_error == "yes") {
|
|
995
|
die("<b>Halted.</b>");
|
|
996
|
}
|
|
997
|
|
|
998
|
return false;
|
|
999
|
}
|
|
1000
|
|
|
1001
|
|
|
1002
|
/******************************************************************************
|
|
1003
|
* This function prints an error message.
|
|
1004
|
* It can be overridden by your subclass of Template. It will be called with an
|
|
1005
|
* error message to display.
|
|
1006
|
*
|
|
1007
|
* usage: haltmsg(string $msg)
|
|
1008
|
*
|
|
1009
|
* @param $msg a string containing the error message to display
|
|
1010
|
* @access public
|
|
1011
|
* @return void
|
|
1012
|
* @see halt
|
|
1013
|
*/
|
|
1014
|
function haltmsg($msg) {
|
|
1015
|
printf("<b>Template Error:</b> %s<br>\n", $msg);
|
|
1016
|
}
|
|
1017
|
|
|
1018
|
}
|
|
1019
|
?>
|