WB 2.08.x

<?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.

     *

     * @param DateTimeZone|string $timezone The default timezone string or a DateTimeZone object

     */

    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()

    {

        if (null === $this->timezone) {

            $this->timezone = new DateTimeZone(date_default_timezone_get());

        }

        return $this->timezone;

    }

    /**

     * Sets the default format to be used by the number_format filter.

     *

     * @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.

     */

    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(),

            new Twig_TokenParser_Embed(),

        );

    }

    /**

     * 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)),

            'date_modify'   => new Twig_Filter_Function('twig_date_modify_filter', array('needs_environment' => true)),

            '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)),

            'abs'           => new Twig_Filter_Function('abs'),

            // 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'),

            'split'   => new Twig_Filter_Function('twig_split_filter'),

            '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),

                '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),

                '=='     => 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

 *

 * @param Twig_Environment                 $env    A Twig_Environment instance

 * @param Traversable|array|integer|string $values The values to pick a random item from

 *

 * @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

 *

 * @return string The formatted date

 */

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];

    }

    if ($date instanceof DateInterval) {

        return $date->format($format);

    }

    return twig_date_converter($env, $date, $timezone)->format($format);

}

/**

 * 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;

}

/**

 * 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)

{

    // determine the timezone

    if (!$timezone) {

        $defaultTimezone = $env->getExtension('core')->getTimezone();

    } elseif (!$timezone instanceof DateTimeZone) {

        $defaultTimezone = new DateTimeZone($timezone);

    } else {

        $defaultTimezone = $timezone;

    }

    if ($date instanceof DateTime) {

        $date = clone $date;

        if (false !== $timezone) {

            $date->setTimezone($defaultTimezone);

        }

        return $date;

    }

    $asString = (string) $date;

    if (ctype_digit($asString) || (!empty($asString) && '-' === $asString[0] && ctype_digit(substr($asString, 1)))) {

        $date = new DateTime('@'.$date);

        $date->setTimezone($defaultTimezone);

        return $date;

    }

    return new DateTime($date, $defaultTimezone);

}

/**

 * 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

 * @param integer             $decimal      The number of decimal points to display.

 * @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);

}

/**

 * 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);

}

// 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)

{

    $strict = is_object($value);

    if (is_array($compare)) {

        return in_array($value, $compare, $strict);

    } elseif (is_string($compare)) {

        if (!strlen((string) $value)) {

            return empty($compare);

        }

        return false !== strpos($compare, (string) $value);

    } elseif (is_object($compare) && $compare instanceof Traversable) {

        return in_array($value, iterator_to_array($compare, false), $strict);

    }

    return false;

}

/**

 * Escapes a string.

 *

 * @param Twig_Environment $env        A Twig_Environment instance

 * @param string           $string     The value to be escaped

 * @param string           $strategy   The escaping strategy

 * @param string           $charset    The charset

 * @param Boolean          $autoescape Whether the function is called by the auto-escaping feature (true) or by the developer (false)

 */

function twig_escape_filter(Twig_Environment $env, $string, $strategy = 'html', $charset = null, $autoescape = false)

{

    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;

    switch ($strategy) {

        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);

            }

            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_js_callback', $string);

            if ('UTF-8' != $charset) {

                $string = twig_convert_encoding($string, $charset, 'UTF-8');

            }

            return $string;

        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;

        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

            // top of the function slow downs other escaping strategies.

            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,