<?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()
{
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)),
'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)),
// 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'),
'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(
'b-and' => array('precedence' => 5, 'class' => 'Twig_Node_Expression_Binary_BitwiseAnd', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
'b-xor' => array('precedence' => 5, 'class' => 'Twig_Node_Expression_Binary_BitwiseXor', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
'b-or' => array('precedence' => 5, 'class' => 'Twig_Node_Expression_Binary_BitwiseOr', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
'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),
'==' => 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|int|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 formatter 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 || $date instanceof DateTime) {
if (null !== $timezone) {
$date = clone $date;
$date->setTimezone($timezone instanceof DateTimeZone ? $timezone : new DateTimeZone($timezone));
}
return $date->format($format);
}
return twig_date_converter($env, $date, $timezone)->format($format);
}
/**
* 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, $timezone = null)
{
if ($date instanceof DateTime) {
return $date;
}
$asString = (string) $date;
if (ctype_digit($asString) || (!empty($asString) && '-' === $asString[0] && ctype_digit(substr($asString, 1)))) {
$date = new DateTime('@'.$date);
$date->setTimezone(new DateTimeZone(date_default_timezone_get()));
} else {
$date = new DateTime($date);
}
// set Timezone
if (null !== $timezone) {
if (!$timezone instanceof DateTimeZone) {
$timezone = new DateTimeZone($timezone);
}
$date->setTimezone($timezone);
} elseif (($timezone = $env->getExtension('core')->getTimezone()) instanceof DateTimeZone) {
$date->setTimezone($timezone);
}
return $date;
}
/**
* 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 int $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) $value);
}
// The '_default' filter is used internally to avoid using the ternary operator
// which costs a lot for big contexts (before PHP 5.4). So, on average,
// a function call is cheaper.
function _twig_default_filter($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, $compare)
{
if (is_array($compare)) {
return in_array($value, $compare);
} elseif (is_string($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));
}
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 (null === $string = preg_replace_callback('#[^\p{L}\p{N} ]#u', '_twig_escape_js_callback', $string)) {
throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 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 $htmlspecialcharsCharsets = array(
'iso-8859-1' => true, 'iso8859-1' => true,
'iso-8859-15' => true, 'iso8859-15' => true,
'utf-8' => true,
'cp866' => true, 'ibm866' => true, '866' => true,
'cp1251' => true, 'windows-1251' => true, 'win-1251' => true,
'1251' => true,
'cp1252' => true, 'windows-1252' => true, '1252' => true,
'koi8-r' => true, 'koi8-ru' => true, 'koi8r' => true,
'big5' => true, '950' => true,
'gb2312' => true, '936' => true,
'big5-hkscs' => true,
'shift_jis' => true, 'sjis' => true, '932' => true,
'euc-jp' => true, 'eucjp' => true,
'iso8859-5' => true, 'iso-8859-5' => true, 'macroman' => true,
);
if (isset($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');
default:
throw new Twig_Error_Runtime(sprintf('Invalid escaping strategy "%s" (valid ones: html, js).', $strategy));
}
}
/* used internally */
function twig_escape_filter_is_safe(Twig_Node $filterArgs)
{
foreach ($filterArgs as $arg) {
if ($arg instanceof Twig_Node_Expression_Constant) {
return array($arg->getAttribute('value'));
}
return array();
}
return array('html');
}
if (function_exists('iconv')) {
function twig_convert_encoding($string, $to, $from)
{
return iconv($from, $to, $string);
}
} elseif (function_exists('mb_convert_encoding')) {
function twig_convert_encoding($string, $to, $from)
{
return mb_convert_encoding($string, $to, $from);
}
} else {
function twig_convert_encoding($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])) {
return '\\x'.substr('00'.bin2hex($char), -2);
}
// \uHHHH
$char = twig_convert_encoding($char, 'UTF-16BE', 'UTF-8');
return '\\u'.substr('0000'.bin2hex($char), -4);
}
// 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
else
{
/**
* 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);
}
