/branches/2.8.x/wb/include/Twig/Extension/Core.php - Annotate - WB 2.08.x - Tracking

wb-archiv283/branches/2.8.x/wb/include/Twig/Extension/Core.php @ 1857

-            darkviper
+<?php
 if (!defined('ENT_SUBSTITUTE')) {
     define('ENT_SUBSTITUTE', 8);
+}
 /*
  * This file is part of Twig.
+ *
  * (c) 2009 Fabien Potencier
+ *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 class Twig_Extension_Core extends Twig_Extension
+{
     protected $dateFormats = array('F j, Y H:i', '%d days');
     protected $numberFormat = array(0, '.', ',');
     protected $timezone = null;
     /**
      * Sets the default format to be used by the date filter.
+     *
      * @param string $format             The default date format string
      * @param string $dateIntervalFormat The default date interval format string
      */
     public function setDateFormat($format = null, $dateIntervalFormat = null)
+    {
         if (null !== $format) {
             $this->dateFormats[0] = $format;
+        }
         if (null !== $dateIntervalFormat) {
             $this->dateFormats[1] = $dateIntervalFormat;
+        }
+    }
     /**
      * Gets the default format to be used by the date filter.
+     *
      * @return array The default date format string and the default date interval format string
      */
     public function getDateFormat()
+    {
         return $this->dateFormats;
+    }
     /**
      * Sets the default timezone to be used by the date filter.
+     *
-            darkviper
+     * @param DateTimeZone|string $timezone The default timezone string or a DateTimeZone object
-            darkviper
+     */
     public function setTimezone($timezone)
+    {
         $this->timezone = $timezone instanceof DateTimeZone ? $timezone : new DateTimeZone($timezone);
+    }
     /**
      * Gets the default timezone to be used by the date filter.
+     *
      * @return DateTimeZone The default timezone currently in use
      */
     public function getTimezone()
+    {
-            darkviper
+        if (null === $this->timezone) {
             $this->timezone = new DateTimeZone(date_default_timezone_get());
+        }
-            darkviper
+        return $this->timezone;
+    }
     /**
      * Sets the default format to be used by the number_format filter.
+     *
-            darkviper
+     * @param integer $decimal      The number of decimal places to use.
      * @param string  $decimalPoint The character(s) to use for the decimal point.
      * @param string  $thousandSep  The character(s) to use for the thousands separator.
-            darkviper
+     */
     public function setNumberFormat($decimal, $decimalPoint, $thousandSep)
+    {
         $this->numberFormat = array($decimal, $decimalPoint, $thousandSep);
+    }
     /**
      * Get the default format used by the number_format filter.
+     *
      * @return array The arguments for number_format()
      */
     public function getNumberFormat()
+    {
         return $this->numberFormat;
+    }
     /**
      * Returns the token parser instance to add to the existing list.
+     *
      * @return array An array of Twig_TokenParser instances
      */
     public function getTokenParsers()
+    {
         return array(
             new Twig_TokenParser_For(),
             new Twig_TokenParser_If(),
             new Twig_TokenParser_Extends(),
             new Twig_TokenParser_Include(),
             new Twig_TokenParser_Block(),
             new Twig_TokenParser_Use(),
             new Twig_TokenParser_Filter(),
             new Twig_TokenParser_Macro(),
             new Twig_TokenParser_Import(),
             new Twig_TokenParser_From(),
             new Twig_TokenParser_Set(),
             new Twig_TokenParser_Spaceless(),
             new Twig_TokenParser_Flush(),
             new Twig_TokenParser_Do(),
-            darkviper
+            new Twig_TokenParser_Embed(),
-            darkviper
+        );
+    }
     /**
      * Returns a list of filters to add to the existing list.
+     *
      * @return array An array of filters
      */
     public function getFilters()
+    {
         $filters = array(
             // formatting filters
             'date'          => new Twig_Filter_Function('twig_date_format_filter', array('needs_environment' => true)),
-            darkviper
+            'date_modify'   => new Twig_Filter_Function('twig_date_modify_filter', array('needs_environment' => true)),
-            darkviper
+            'format'        => new Twig_Filter_Function('sprintf'),
             'replace'       => new Twig_Filter_Function('strtr'),
             'number_format' => new Twig_Filter_Function('twig_number_format_filter', array('needs_environment' => true)),
-            darkviper
+            'abs'           => new Twig_Filter_Function('abs'),
             darkviper
             // encoding
             'url_encode'       => new Twig_Filter_Function('twig_urlencode_filter'),
             'json_encode'      => new Twig_Filter_Function('twig_jsonencode_filter'),
             'convert_encoding' => new Twig_Filter_Function('twig_convert_encoding'),
             // string filters
             'title'      => new Twig_Filter_Function('twig_title_string_filter', array('needs_environment' => true)),
             'capitalize' => new Twig_Filter_Function('twig_capitalize_string_filter', array('needs_environment' => true)),
             'upper'      => new Twig_Filter_Function('strtoupper'),
             'lower'      => new Twig_Filter_Function('strtolower'),
             'striptags'  => new Twig_Filter_Function('strip_tags'),
             'trim'       => new Twig_Filter_Function('trim'),
             'nl2br'      => new Twig_Filter_Function('nl2br', array('pre_escape' => 'html', 'is_safe' => array('html'))),
             // array helpers
             'join'    => new Twig_Filter_Function('twig_join_filter'),
-            darkviper
+            'split'   => new Twig_Filter_Function('twig_split_filter'),
-            darkviper
+            'sort'    => new Twig_Filter_Function('twig_sort_filter'),
             'merge'   => new Twig_Filter_Function('twig_array_merge'),
             // string/array filters
             'reverse' => new Twig_Filter_Function('twig_reverse_filter', array('needs_environment' => true)),
             'length'  => new Twig_Filter_Function('twig_length_filter', array('needs_environment' => true)),
             'slice'   => new Twig_Filter_Function('twig_slice', array('needs_environment' => true)),
             // iteration and runtime
             'default' => new Twig_Filter_Node('Twig_Node_Expression_Filter_Default'),
             '_default' => new Twig_Filter_Function('_twig_default_filter'),
             'keys'    => new Twig_Filter_Function('twig_get_array_keys_filter'),
             // escaping
             'escape' => new Twig_Filter_Function('twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
             'e'      => new Twig_Filter_Function('twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
         );
         if (function_exists('mb_get_info')) {
             $filters['upper'] = new Twig_Filter_Function('twig_upper_filter', array('needs_environment' => true));
             $filters['lower'] = new Twig_Filter_Function('twig_lower_filter', array('needs_environment' => true));
+        }
         return $filters;
+    }
     /**
      * Returns a list of global functions to add to the existing list.
+     *
      * @return array An array of global functions
      */
     public function getFunctions()
+    {
         return array(
             'range'    => new Twig_Function_Function('range'),
             'constant' => new Twig_Function_Function('constant'),
             'cycle'    => new Twig_Function_Function('twig_cycle'),
             'random'   => new Twig_Function_Function('twig_random', array('needs_environment' => true)),
             'date'     => new Twig_Function_Function('twig_date_converter', array('needs_environment' => true)),
         );
+    }
     /**
      * Returns a list of tests to add to the existing list.
+     *
      * @return array An array of tests
      */
     public function getTests()
+    {
         return array(
             'even'        => new Twig_Test_Node('Twig_Node_Expression_Test_Even'),
             'odd'         => new Twig_Test_Node('Twig_Node_Expression_Test_Odd'),
             'defined'     => new Twig_Test_Node('Twig_Node_Expression_Test_Defined'),
             'sameas'      => new Twig_Test_Node('Twig_Node_Expression_Test_Sameas'),
             'none'        => new Twig_Test_Node('Twig_Node_Expression_Test_Null'),
             'null'        => new Twig_Test_Node('Twig_Node_Expression_Test_Null'),
             'divisibleby' => new Twig_Test_Node('Twig_Node_Expression_Test_Divisibleby'),
             'constant'    => new Twig_Test_Node('Twig_Node_Expression_Test_Constant'),
             'empty'       => new Twig_Test_Function('twig_test_empty'),
             'iterable'    => new Twig_Test_Function('twig_test_iterable'),
         );
+    }
     /**
      * Returns a list of operators to add to the existing list.
+     *
      * @return array An array of operators
      */
     public function getOperators()
+    {
         return array(
             array(
                 'not' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Not'),
                 '-'   => array('precedence' => 500, 'class' => 'Twig_Node_Expression_Unary_Neg'),
                 '+'   => array('precedence' => 500, 'class' => 'Twig_Node_Expression_Unary_Pos'),
             ),
             array(
                 'or'     => array('precedence' => 10, 'class' => 'Twig_Node_Expression_Binary_Or', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 'and'    => array('precedence' => 15, 'class' => 'Twig_Node_Expression_Binary_And', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
-            darkviper
+                'b-or'   => array('precedence' => 16, 'class' => 'Twig_Node_Expression_Binary_BitwiseOr', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 'b-xor'  => array('precedence' => 17, 'class' => 'Twig_Node_Expression_Binary_BitwiseXor', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 'b-and'  => array('precedence' => 18, 'class' => 'Twig_Node_Expression_Binary_BitwiseAnd', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
-            darkviper
+                '=='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Equal', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '!='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '<'      => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Less', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '>'      => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Greater', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '>='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_GreaterEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '<='     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_LessEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 'not in' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotIn', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 'in'     => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_In', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '..'     => array('precedence' => 25, 'class' => 'Twig_Node_Expression_Binary_Range', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '+'      => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Add', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '-'      => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Sub', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '~'      => array('precedence' => 40, 'class' => 'Twig_Node_Expression_Binary_Concat', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '*'      => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mul', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '/'      => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Div', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '//'     => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_FloorDiv', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '%'      => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mod', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 'is'     => array('precedence' => 100, 'callable' => array($this, 'parseTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 'is not' => array('precedence' => 100, 'callable' => array($this, 'parseNotTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
                 '**'     => array('precedence' => 200, 'class' => 'Twig_Node_Expression_Binary_Power', 'associativity' => Twig_ExpressionParser::OPERATOR_RIGHT),
             ),
         );
+    }
     public function parseNotTestExpression(Twig_Parser $parser, $node)
+    {
         return new Twig_Node_Expression_Unary_Not($this->parseTestExpression($parser, $node), $parser->getCurrentToken()->getLine());
+    }
     public function parseTestExpression(Twig_Parser $parser, $node)
+    {
         $stream = $parser->getStream();
         $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
         $arguments = null;
         if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
             $arguments = $parser->getExpressionParser()->parseArguments();
+        }
         $class = $this->getTestNodeClass($parser->getEnvironment(), $name);
         return new $class($node, $name, $arguments, $parser->getCurrentToken()->getLine());
+    }
     protected function getTestNodeClass(Twig_Environment $env, $name)
+    {
         $testMap = $env->getTests();
         if (isset($testMap[$name]) && $testMap[$name] instanceof Twig_Test_Node) {
             return $testMap[$name]->getClass();
+        }
         return 'Twig_Node_Expression_Test';
+    }
     /**
      * Returns the name of the extension.
+     *
      * @return string The extension name
      */
     public function getName()
+    {
         return 'core';
+    }
+}
 /**
  * Cycles over a value.
+ *
  * @param ArrayAccess|array $values An array or an ArrayAccess instance
  * @param integer           $i      The cycle value
+ *
  * @return string The next value in the cycle
  */
 function twig_cycle($values, $i)
+{
     if (!is_array($values) && !$values instanceof ArrayAccess) {
         return $values;
+    }
     return $values[$i % count($values)];
+}
 /**
  * Returns a random value depending on the supplied parameter type:
  * - a random item from a Traversable or array
  * - a random character from a string
  * - a random integer between 0 and the integer parameter
+ *
-            darkviper
+ * @param Twig_Environment                 $env    A Twig_Environment instance
  * @param Traversable|array|integer|string $values The values to pick a random item from
             darkviper
  * @throws Twig_Error_Runtime When $values is an empty array (does not apply to an empty string which is returned as is).
+ *
  * @return mixed A random value from the given sequence
  */
 function twig_random(Twig_Environment $env, $values = null)
+{
     if (null === $values) {
         return mt_rand();
+    }
     if (is_int($values) || is_float($values)) {
         return $values < 0 ? mt_rand($values, 0) : mt_rand(0, $values);
+    }
     if ($values instanceof Traversable) {
         $values = iterator_to_array($values);
     } elseif (is_string($values)) {
         if ('' === $values) {
             return '';
+        }
         if (null !== $charset = $env->getCharset()) {
             if ('UTF-8' != $charset) {
                 $values = twig_convert_encoding($values, 'UTF-8', $charset);
+            }
             // unicode version of str_split()
             // split at all positions, but not after the start and not before the end
             $values = preg_split('/(?<!^)(?!$)/u', $values);
             if ('UTF-8' != $charset) {
                 foreach ($values as $i => $value) {
                     $values[$i] = twig_convert_encoding($value, $charset, 'UTF-8');
+                }
+            }
         } else {
             return $values[mt_rand(0, strlen($values) - 1)];
+        }
+    }
     if (!is_array($values)) {
         return $values;
+    }
     if (0 === count($values)) {
         throw new Twig_Error_Runtime('The random function cannot pick from an empty array.');
+    }
     return $values[array_rand($values, 1)];
+}
 /**
  * Converts a date to the given format.
+ *
  * <pre>
  *   {{ post.published_at|date("m/d/Y") }}
  * </pre>
+ *
  * @param Twig_Environment             $env      A Twig_Environment instance
  * @param DateTime|DateInterval|string $date     A date
  * @param string                       $format   A format
  * @param DateTimeZone|string          $timezone A timezone
+ *
-            darkviper
+ * @return string The formatted date
-            darkviper
+ */
 function twig_date_format_filter(Twig_Environment $env, $date, $format = null, $timezone = null)
+{
     if (null === $format) {
         $formats = $env->getExtension('core')->getDateFormat();
         $format = $date instanceof DateInterval ? $formats[1] : $formats[0];
+    }
-            darkviper
+    if ($date instanceof DateInterval) {
-            darkviper
+        return $date->format($format);
+    }
     return twig_date_converter($env, $date, $timezone)->format($format);
+}
 /**
-            darkviper
+ * Returns a new date object modified
+ *
  * <pre>
  *   {{ post.published_at|modify("-1day")|date("m/d/Y") }}
  * </pre>
+ *
  * @param Twig_Environment  $env      A Twig_Environment instance
  * @param DateTime|string   $date     A date
  * @param string            $modifier A modifier string
+ *
  * @return DateTime A new date object
  */
 function twig_date_modify_filter(Twig_Environment $env, $date, $modifier)
+{
     $date = twig_date_converter($env, $date, false);
     $date->modify($modifier);
     return $date;
+}
 /**
-            darkviper
+ * Converts an input to a DateTime instance.
+ *
  * <pre>
  *    {% if date(user.created_at) < date('+2days') %}
  *      {# do something #}
  *    {% endif %}
  * </pre>
+ *
  * @param Twig_Environment    $env      A Twig_Environment instance
  * @param DateTime|string     $date     A date
  * @param DateTimeZone|string $timezone A timezone
+ *
  * @return DateTime A DateTime instance
  */
 function twig_date_converter(Twig_Environment $env, $date = null, $timezone = null)
+{
-            darkviper
+    // determine the timezone
     if (!$timezone) {
         $defaultTimezone = $env->getExtension('core')->getTimezone();
     } elseif (!$timezone instanceof DateTimeZone) {
         $defaultTimezone = new DateTimeZone($timezone);
     } else {
         $defaultTimezone = $timezone;
+    }
-            darkviper
+    if ($date instanceof DateTime) {
-            darkviper
+        $date = clone $date;
         if (false !== $timezone) {
             $date->setTimezone($defaultTimezone);
+        }
-            darkviper
+        return $date;
+    }
     $asString = (string) $date;
     if (ctype_digit($asString) || (!empty($asString) && '-' === $asString[0] && ctype_digit(substr($asString, 1)))) {
         $date = new DateTime('@'.$date);
-            darkviper
+        $date->setTimezone($defaultTimezone);
             darkviper
-            darkviper
+        return $date;
             darkviper
-            darkviper
+    return new DateTime($date, $defaultTimezone);
             darkviper
 /**
  * Number format filter.
+ *
  * All of the formatting options can be left null, in that case the defaults will
  * be used.  Supplying any of the parameters will override the defaults set in the
  * environment object.
+ *
  * @param Twig_Environment    $env          A Twig_Environment instance
  * @param mixed               $number       A float/int/string of the number to format
-            darkviper
+ * @param integer             $decimal      The number of decimal points to display.
-            darkviper
+ * @param string              $decimalPoint The character(s) to use for the decimal point.
  * @param string              $thousandSep  The character(s) to use for the thousands separator.
+ *
  * @return string The formatted number
  */
 function twig_number_format_filter(Twig_Environment $env, $number, $decimal = null, $decimalPoint = null, $thousandSep = null)
+{
     $defaults = $env->getExtension('core')->getNumberFormat();
     if (null === $decimal) {
         $decimal = $defaults[0];
+    }
     if (null === $decimalPoint) {
         $decimalPoint = $defaults[1];
+    }
     if (null === $thousandSep) {
         $thousandSep = $defaults[2];
+    }
     return number_format((float) $number, $decimal, $decimalPoint, $thousandSep);
+}
 /**
  * URL encodes a string.
+ *
  * @param string $url A URL
  * @param bool   $raw true to use rawurlencode() instead of urlencode
+ *
  * @return string The URL encoded value
  */
 function twig_urlencode_filter($url, $raw = false)
+{
     if ($raw) {
         return rawurlencode($url);
+    }
     return urlencode($url);
+}
 if (version_compare(PHP_VERSION, '5.3.0', '<')) {
     /**
      * JSON encodes a variable.
+     *
      * @param mixed   $value   The value to encode.
      * @param integer $options Not used on PHP 5.2.x
+     *
      * @return mixed The JSON encoded value
      */
     function twig_jsonencode_filter($value, $options = 0)
+    {
         if ($value instanceof Twig_Markup) {
             $value = (string) $value;
         } elseif (is_array($value)) {
             array_walk_recursive($value, '_twig_markup2string');
+        }
         return json_encode($value);
+    }
 } else {
     /**
      * JSON encodes a variable.
+     *
      * @param mixed   $value   The value to encode.
      * @param integer $options Bitmask consisting of JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT
+     *
      * @return mixed The JSON encoded value
      */
     function twig_jsonencode_filter($value, $options = 0)
+    {
         if ($value instanceof Twig_Markup) {
             $value = (string) $value;
         } elseif (is_array($value)) {
             array_walk_recursive($value, '_twig_markup2string');
+        }
         return json_encode($value, $options);
+    }
+}
 function _twig_markup2string(&$value)
+{
     if ($value instanceof Twig_Markup) {
         $value = (string) $value;
+    }
+}
 /**
  * Merges an array with another one.
+ *
  * <pre>
  *  {% set items = { 'apple': 'fruit', 'orange': 'fruit' } %}
+ *
  *  {% set items = items|merge({ 'peugeot': 'car' }) %}
+ *
  *  {# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car' } #}
  * </pre>
+ *
  * @param array $arr1 An array
  * @param array $arr2 An array
+ *
  * @return array The merged array
  */
 function twig_array_merge($arr1, $arr2)
+{
     if (!is_array($arr1) || !is_array($arr2)) {
         throw new Twig_Error_Runtime('The merge filter only works with arrays or hashes.');
+    }
     return array_merge($arr1, $arr2);
+}
 /**
  * Slices a variable.
+ *
  * @param Twig_Environment $env          A Twig_Environment instance
  * @param mixed            $item         A variable
  * @param integer          $start        Start of the slice
  * @param integer          $length       Size of the slice
  * @param Boolean          $preserveKeys Whether to preserve key or not (when the input is an array)
+ *
  * @return mixed The sliced variable
  */
 function twig_slice(Twig_Environment $env, $item, $start, $length = null, $preserveKeys = false)
+{
     if ($item instanceof Traversable) {
         $item = iterator_to_array($item, false);
+    }
     if (is_array($item)) {
         return array_slice($item, $start, $length, $preserveKeys);
+    }
     $item = (string) $item;
     if (function_exists('mb_get_info') && null !== $charset = $env->getCharset()) {
         return mb_substr($item, $start, null === $length ? mb_strlen($item, $charset) - $start : $length, $charset);
+    }
     return null === $length ? substr($item, $start) : substr($item, $start, $length);
+}
 /**
  * Joins the values to a string.
+ *
  * The separator between elements is an empty string per default, you can define it with the optional parameter.
+ *
  * <pre>
  *  {{ [1, 2, 3]|join('|') }}
  *  {# returns 1|2|3 #}
+ *
  *  {{ [1, 2, 3]|join }}
  *  {# returns 123 #}
  * </pre>
+ *
  * @param array  $value An array
  * @param string $glue  The separator
+ *
  * @return string The concatenated string
  */
 function twig_join_filter($value, $glue = '')
+{
     if ($value instanceof Traversable) {
         $value = iterator_to_array($value, false);
+    }
     return implode($glue, (array) $value);
+}
-            darkviper
+/**
  * Splits the string into an array.
+ *
  * <pre>
  *  {{ "one,two,three"|split(',') }}
  *  {# returns [one, two, three] #}
+ *
  *  {{ "one,two,three,four,five"|split(',', 3) }}
  *  {# returns [one, two, "three,four,five"] #}
+ *
  *  {{ "123"|split('') }}
  *  {# returns [1, 2, 3] #}
+ *
  *  {{ "aabbcc"|split('', 2) }}
  *  {# returns [aa, bb, cc] #}
  * </pre>
+ *
  * @param string  $value     A string
  * @param string  $delimiter The delimiter
  * @param integer $limit     The limit
+ *
  * @return array The split string as an array
  */
 function twig_split_filter($value, $delimiter, $limit = null)
+{
     if (empty($delimiter)) {
         return str_split($value, null === $limit ? 1 : $limit);
+    }
     return null === $limit ? explode($delimiter, $value) : explode($delimiter, $value, $limit);
+}
-            darkviper
+// The '_default' filter is used internally to avoid using the ternary operator
 // which costs a lot for big contexts (before PHP 5.4). So, on average,
 // a function call is cheaper.
 function _twig_default_filter($value, $default = '')
+{
     if (twig_test_empty($value)) {
         return $default;
+    }
     return $value;
+}
 /**
  * Returns the keys for the given array.
+ *
  * It is useful when you want to iterate over the keys of an array:
+ *
  * <pre>
  *  {% for key in array|keys %}
  *      {# ... #}
  *  {% endfor %}
  * </pre>
+ *
  * @param array $array An array
+ *
  * @return array The keys
  */
 function twig_get_array_keys_filter($array)
+{
     if (is_object($array) && $array instanceof Traversable) {
         return array_keys(iterator_to_array($array));
+    }
     if (!is_array($array)) {
         return array();
+    }
     return array_keys($array);
+}
 /**
  * Reverses a variable.
+ *
  * @param Twig_Environment         $env          A Twig_Environment instance
  * @param array|Traversable|string $item         An array, a Traversable instance, or a string
  * @param Boolean                  $preserveKeys Whether to preserve key or not
+ *
  * @return mixed The reversed input
  */
 function twig_reverse_filter(Twig_Environment $env, $item, $preserveKeys = false)
+{
     if (is_object($item) && $item instanceof Traversable) {
         return array_reverse(iterator_to_array($item), $preserveKeys);
+    }
     if (is_array($item)) {
         return array_reverse($item, $preserveKeys);
+    }
     if (null !== $charset = $env->getCharset()) {
         $string = (string) $item;
         if ('UTF-8' != $charset) {
             $item = twig_convert_encoding($string, 'UTF-8', $charset);
+        }
         preg_match_all('/./us', $item, $matches);
         $string = implode('', array_reverse($matches[0]));
         if ('UTF-8' != $charset) {
             $string = twig_convert_encoding($string, $charset, 'UTF-8');
+        }
         return $string;
+    }
     return strrev((string) $item);
+}
 /**
  * Sorts an array.
+ *
  * @param array $array An array
  */
 function twig_sort_filter($array)
+{
     asort($array);
     return $array;
+}
 /* used internally */
 function twig_in_filter($value, $compare)
+{
-            darkviper
+    $strict = is_object($value);
-            darkviper
+    if (is_array($compare)) {
-            darkviper
+        return in_array($value, $compare, $strict);
-            darkviper
+    } elseif (is_string($compare)) {
         if (!strlen((string) $value)) {
             return empty($compare);
+        }
         return false !== strpos($compare, (string) $value);
     } elseif (is_object($compare) && $compare instanceof Traversable) {
-            darkviper
+        return in_array($value, iterator_to_array($compare, false), $strict);
             darkviper
     return false;
+}
 /**
  * Escapes a string.
+ *
  * @param Twig_Environment $env        A Twig_Environment instance
  * @param string           $string     The value to be escaped
-            darkviper
+ * @param string           $strategy   The escaping strategy
-            darkviper
+ * @param string           $charset    The charset
  * @param Boolean          $autoescape Whether the function is called by the auto-escaping feature (true) or by the developer (false)
  */
-            darkviper
+function twig_escape_filter(Twig_Environment $env, $string, $strategy = 'html', $charset = null, $autoescape = false)
             darkviper
     if ($autoescape && is_object($string) && $string instanceof Twig_Markup) {
         return $string;
+    }
     if (!is_string($string) && !(is_object($string) && method_exists($string, '__toString'))) {
         return $string;
+    }
     if (null === $charset) {
         $charset = $env->getCharset();
+    }
     $string = (string) $string;
-            darkviper
+    switch ($strategy) {
-            darkviper
+        case 'js':
             // escape all non-alphanumeric characters
             // into their \xHH or \uHHHH representations
             if ('UTF-8' != $charset) {
                 $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
-            darkviper
+            if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
-            darkviper
+                throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
-            darkviper
+            $string = preg_replace_callback('#[^a-zA-Z0-9,\._]#Su', '_twig_escape_js_callback', $string);
-            darkviper
+            if ('UTF-8' != $charset) {
                 $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
             return $string;
-            darkviper
+        case 'css':
             if ('UTF-8' != $charset) {
                 $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
             if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
                 throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
             $string = preg_replace_callback('#[^a-zA-Z0-9]#Su', '_twig_escape_css_callback', $string);
             if ('UTF-8' != $charset) {
                 $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
             return $string;
         case 'html_attr':
             if ('UTF-8' != $charset) {
                 $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
             if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
                 throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
             $string = preg_replace_callback('#[^a-zA-Z0-9,\.\-_]#Su', '_twig_escape_html_attr_callback', $string);
             if ('UTF-8' != $charset) {
                 $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
             return $string;
-            darkviper
+        case 'html':
             // see http://php.net/htmlspecialchars
             // Using a static variable to avoid initializing the array
             // each time the function is called. Moving the declaration on the
-            darkviper
+            // top of the function slow downs other escaping strategies.
-            darkviper
+            static $htmlspecialcharsCharsets = array(
                 'iso-8859-1' => true, 'iso8859-1' => true,
                 'iso-8859-15' => true, 'iso8859-15' => true,
                 'utf-8' => true,
                 'cp866' => true, 'ibm866' => true, '866' => true,
                 'cp1251' => true, 'windows-1251' => true, 'win-1251' => true,
                 '1251' => true,
                 'cp1252' => true, 'windows-1252' => true, '1252' => true,
                 'koi8-r' => true, 'koi8-ru' => true, 'koi8r' => true,
                 'big5' => true, '950' => true,
                 'gb2312' => true, '936' => true,
                 'big5-hkscs' => true,
                 'shift_jis' => true, 'sjis' => true, '932' => true,
                 'euc-jp' => true, 'eucjp' => true,
                 'iso8859-5' => true, 'iso-8859-5' => true, 'macroman' => true,
             );
             if (isset($htmlspecialcharsCharsets[strtolower($charset)])) {
                 return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
+            }
             $string = twig_convert_encoding($string, 'UTF-8', $charset);
             $string = htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
             return twig_convert_encoding($string, $charset, 'UTF-8');
-            darkviper
+        case 'url':
             if (version_compare(PHP_VERSION, '5.3.0', '<')) {
                 return str_replace('%7E', '~', rawurlencode($string));
+            }
             return rawurlencode($string);
-            darkviper
+        default:
-            darkviper
+            throw new Twig_Error_Runtime(sprintf('Invalid escaping strategy "%s" (valid ones: html, js, url, css, and html_attr).', $strategy));
             darkviper
+}
 /* used internally */
 function twig_escape_filter_is_safe(Twig_Node $filterArgs)
+{
     foreach ($filterArgs as $arg) {
         if ($arg instanceof Twig_Node_Expression_Constant) {
             return array($arg->getAttribute('value'));
+        }
         return array();
+    }
     return array('html');
+}
-            darkviper
+if (function_exists('mb_convert_encoding')) {
-            darkviper
+    function twig_convert_encoding($string, $to, $from)
+    {
-            darkviper
+        return mb_convert_encoding($string, $to, $from);
             darkviper
-            darkviper
+} elseif (function_exists('iconv')) {
-            darkviper
+    function twig_convert_encoding($string, $to, $from)
+    {
-            darkviper
+        return iconv($from, $to, $string);
             darkviper
 } else {
     function twig_convert_encoding($string, $to, $from)
+    {
         throw new Twig_Error_Runtime('No suitable convert encoding function (use UTF-8 as your encoding or install the iconv or mbstring extension).');
+    }
+}
 function _twig_escape_js_callback($matches)
+{
     $char = $matches[0];
     // \xHH
     if (!isset($char[1])) {
-            darkviper
+        return '\\x'.strtoupper(substr('00'.bin2hex($char), -2));
             darkviper
     // \uHHHH
     $char = twig_convert_encoding($char, 'UTF-16BE', 'UTF-8');
-            darkviper
+    return '\\u'.strtoupper(substr('0000'.bin2hex($char), -4));
             darkviper
-            darkviper
+function _twig_escape_css_callback($matches)
+{
     $char = $matches[0];
     // \xHH
     if (!isset($char[1])) {
         $hex = ltrim(strtoupper(bin2hex($char)), '0');
         if (0 === strlen($hex)) {
             $hex = '0';
+        }
         return '\\'.$hex.' ';
+    }
     // \uHHHH
     $char = twig_convert_encoding($char, 'UTF-16BE', 'UTF-8');
     return '\\'.ltrim(strtoupper(bin2hex($char)), '0').' ';
+}
 /**
  * This function is adapted from code coming from Zend Framework.
+ *
  * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
  * @license   http://framework.zend.com/license/new-bsd New BSD License
  */
 function _twig_escape_html_attr_callback($matches)
+{
     /*
      * While HTML supports far more named entities, the lowest common denominator
      * has become HTML5's XML Serialisation which is restricted to the those named
      * entities that XML supports. Using HTML entities would result in this error:
      *     XML Parsing Error: undefined entity
      */
     static $entityMap = array(
 => 'quot', /* quotation mark */
 => 'amp',  /* ampersand */
 => 'lt',   /* less-than sign */
 => 'gt',   /* greater-than sign */
     );
     $chr = $matches[0];
     $ord = ord($chr);
     /**
      * The following replaces characters undefined in HTML with the
      * hex entity for the Unicode replacement character.
      */
     if (($ord <= 0x1f && $chr != "\t" && $chr != "\n" && $chr != "\r") || ($ord >= 0x7f && $ord <= 0x9f)) {
         return '&#xFFFD;';
+    }
     /**
      * Check if the current character to escape has a name entity we should
      * replace it with while grabbing the hex value of the character.
      */
     if (strlen($chr) == 1) {
         $hex = strtoupper(substr('00'.bin2hex($chr), -2));
     } else {
         $chr = twig_convert_encoding($chr, 'UTF-16BE', 'UTF-8');
         $hex = strtoupper(substr('0000'.bin2hex($chr), -4));
+    }
     $int = hexdec($hex);
     if (array_key_exists($int, $entityMap)) {
         return sprintf('&%s;', $entityMap[$int]);
+    }
     /**
      * Per OWASP recommendations, we'll use hex entities for any other
      * characters where a named entity does not exist.
      */
     return sprintf('&#x%s;', $hex);
+}
-            darkviper
+// add multibyte extensions if possible
 if (function_exists('mb_get_info')) {
     /**
      * Returns the length of a variable.
+     *
      * @param Twig_Environment $env   A Twig_Environment instance
      * @param mixed            $thing A variable
+     *
      * @return integer The length of the value
      */
     function twig_length_filter(Twig_Environment $env, $thing)
+    {
         return is_scalar($thing) ? mb_strlen($thing, $env->getCharset()) : count($thing);
+    }
     /**
      * Converts a string to uppercase.
+     *
      * @param Twig_Environment $env    A Twig_Environment instance
      * @param string           $string A string
+     *
      * @return string The uppercased string
      */
     function twig_upper_filter(Twig_Environment $env, $string)
+    {
         if (null !== ($charset = $env->getCharset())) {
             return mb_strtoupper($string, $charset);
+        }
         return strtoupper($string);
+    }
     /**
      * Converts a string to lowercase.
+     *
      * @param Twig_Environment $env    A Twig_Environment instance
      * @param string           $string A string
+     *
      * @return string The lowercased string
      */
     function twig_lower_filter(Twig_Environment $env, $string)
+    {
         if (null !== ($charset = $env->getCharset())) {
             return mb_strtolower($string, $charset);
+        }
         return strtolower($string);
+    }
     /**
      * Returns a titlecased string.
+     *
      * @param Twig_Environment $env    A Twig_Environment instance
      * @param string           $string A string
+     *
      * @return string The titlecased string
      */
     function twig_title_string_filter(Twig_Environment $env, $string)
+    {
         if (null !== ($charset = $env->getCharset())) {
             return mb_convert_case($string, MB_CASE_TITLE, $charset);
+        }
         return ucwords(strtolower($string));
+    }
     /**
      * Returns a capitalized string.
+     *
      * @param Twig_Environment $env    A Twig_Environment instance
      * @param string           $string A string
+     *
      * @return string The capitalized string
      */
     function twig_capitalize_string_filter(Twig_Environment $env, $string)
+    {
         if (null !== ($charset = $env->getCharset())) {
             return mb_strtoupper(mb_substr($string, 0, 1, $charset), $charset).
                          mb_strtolower(mb_substr($string, 1, mb_strlen($string, $charset), $charset), $charset);
+        }
         return ucfirst(strtolower($string));
+    }
+}
 // and byte fallback
-            darkviper
+else {
-            darkviper
+    /**
      * Returns the length of a variable.
+     *
      * @param Twig_Environment $env   A Twig_Environment instance
      * @param mixed            $thing A variable
+     *
      * @return integer The length of the value
      */
     function twig_length_filter(Twig_Environment $env, $thing)
+    {
         return is_scalar($thing) ? strlen($thing) : count($thing);
+    }
     /**
      * Returns a titlecased string.
+     *
      * @param Twig_Environment $env    A Twig_Environment instance
      * @param string           $string A string
+     *
      * @return string The titlecased string
      */
     function twig_title_string_filter(Twig_Environment $env, $string)
+    {
         return ucwords(strtolower($string));
+    }
     /**
      * Returns a capitalized string.
+     *
      * @param Twig_Environment $env    A Twig_Environment instance
      * @param string           $string A string
+     *
      * @return string The capitalized string
      */
     function twig_capitalize_string_filter(Twig_Environment $env, $string)
+    {
         return ucfirst(strtolower($string));
+    }
+}
 /* used internally */
 function twig_ensure_traversable($seq)
+{
     if ($seq instanceof Traversable || is_array($seq)) {
         return $seq;
+    }
     return array();
+}
 /**
  * Checks if a variable is empty.
+ *
  * <pre>
  * {# evaluates to true if the foo variable is null, false, or the empty string #}
  * {% if foo is empty %}
  *     {# ... #}
  * {% endif %}
  * </pre>
+ *
  * @param mixed $value A variable
+ *
  * @return Boolean true if the value is empty, false otherwise
  */
 function twig_test_empty($value)
+{
     if ($value instanceof Countable) {
         return 0 == count($value);
+    }
     return false === $value || (empty($value) && '0' != $value);
+}
 /**
  * Checks if a variable is traversable.
+ *
  * <pre>
  * {# evaluates to true if the foo variable is an array or a traversable object #}
  * {% if foo is traversable %}
  *     {# ... #}
  * {% endif %}
  * </pre>
+ *
  * @param mixed $value A variable
+ *
  * @return Boolean true if the value is traversable
  */
 function twig_test_iterable($value)
+{
     return $value instanceof Traversable || is_array($value);
+}

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