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846 lines
26 KiB
846 lines
26 KiB
<?php
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if (!defined('ENT_SUBSTITUTE')) {
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define('ENT_SUBSTITUTE', 8);
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}
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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class Twig_Extension_Core extends Twig_Extension
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{
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/**
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* Returns the token parser instance to add to the existing list.
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*
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* @return array An array of Twig_TokenParser instances
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*/
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public function getTokenParsers()
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{
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return array(
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new Twig_TokenParser_For(),
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new Twig_TokenParser_If(),
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new Twig_TokenParser_Extends(),
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new Twig_TokenParser_Include(),
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new Twig_TokenParser_Block(),
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new Twig_TokenParser_Use(),
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new Twig_TokenParser_Filter(),
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new Twig_TokenParser_Macro(),
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new Twig_TokenParser_Import(),
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new Twig_TokenParser_From(),
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new Twig_TokenParser_Set(),
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new Twig_TokenParser_Spaceless(),
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);
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}
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/**
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* Returns a list of filters to add to the existing list.
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*
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* @return array An array of filters
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*/
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public function getFilters()
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{
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$filters = array(
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// formatting filters
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'date' => new Twig_Filter_Function('twig_date_format_filter'),
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'format' => new Twig_Filter_Function('sprintf'),
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'replace' => new Twig_Filter_Function('twig_strtr'),
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// encoding
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'url_encode' => new Twig_Filter_Function('twig_urlencode_filter'),
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'json_encode' => new Twig_Filter_Function('twig_jsonencode_filter'),
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// string filters
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'title' => new Twig_Filter_Function('twig_title_string_filter', array('needs_environment' => true)),
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'capitalize' => new Twig_Filter_Function('twig_capitalize_string_filter', array('needs_environment' => true)),
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'upper' => new Twig_Filter_Function('strtoupper'),
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'lower' => new Twig_Filter_Function('strtolower'),
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'striptags' => new Twig_Filter_Function('strip_tags'),
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// array helpers
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'join' => new Twig_Filter_Function('twig_join_filter'),
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'reverse' => new Twig_Filter_Function('twig_reverse_filter'),
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'length' => new Twig_Filter_Function('twig_length_filter', array('needs_environment' => true)),
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'sort' => new Twig_Filter_Function('twig_sort_filter'),
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'merge' => new Twig_Filter_Function('twig_array_merge'),
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// iteration and runtime
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'default' => new Twig_Filter_Function('twig_default_filter'),
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'keys' => new Twig_Filter_Function('twig_get_array_keys_filter'),
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// escaping
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'escape' => new Twig_Filter_Function('twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
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'e' => new Twig_Filter_Function('twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
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);
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if (function_exists('mb_get_info')) {
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$filters['upper'] = new Twig_Filter_Function('twig_upper_filter', array('needs_environment' => true));
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$filters['lower'] = new Twig_Filter_Function('twig_lower_filter', array('needs_environment' => true));
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}
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return $filters;
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}
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/**
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* Returns a list of global functions to add to the existing list.
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*
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* @return array An array of global functions
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*/
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public function getFunctions()
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{
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return array(
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'range' => new Twig_Function_Function('range'),
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'constant' => new Twig_Function_Function('constant'),
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'cycle' => new Twig_Function_Function('twig_cycle'),
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);
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}
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/**
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* Returns a list of filters to add to the existing list.
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*
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* @return array An array of filters
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*/
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public function getTests()
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{
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return array(
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'even' => new Twig_Test_Function('twig_test_even'),
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'odd' => new Twig_Test_Function('twig_test_odd'),
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'defined' => new Twig_Test_Function('twig_test_defined'),
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'sameas' => new Twig_Test_Function('twig_test_sameas'),
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'none' => new Twig_Test_Function('twig_test_none'),
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'null' => new Twig_Test_Function('twig_test_none'),
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'divisibleby' => new Twig_Test_Function('twig_test_divisibleby'),
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'constant' => new Twig_Test_Function('twig_test_constant'),
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'empty' => new Twig_Test_Function('twig_test_empty'),
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);
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}
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/**
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* Returns a list of operators to add to the existing list.
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*
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* @return array An array of operators
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*/
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public function getOperators()
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{
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return array(
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array(
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'not' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Not'),
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'-' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Neg'),
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'+' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Pos'),
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),
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array(
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'b-and' => array('precedence' => 5, 'class' => 'Twig_Node_Expression_Binary_BitwiseAnd', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'b-xor' => array('precedence' => 5, 'class' => 'Twig_Node_Expression_Binary_BitwiseXor', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'b-or' => array('precedence' => 5, 'class' => 'Twig_Node_Expression_Binary_BitwiseOr', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'or' => array('precedence' => 10, 'class' => 'Twig_Node_Expression_Binary_Or', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'and' => array('precedence' => 15, 'class' => 'Twig_Node_Expression_Binary_And', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'==' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Equal', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'!=' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'<' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Less', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'>' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Greater', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'>=' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_GreaterEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'<=' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_LessEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'not in' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotIn', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'in' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_In', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'+' => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Add', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'-' => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Sub', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'~' => array('precedence' => 40, 'class' => 'Twig_Node_Expression_Binary_Concat', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'*' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mul', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'/' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Div', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'//' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_FloorDiv', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'%' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mod', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'is' => array('precedence' => 100, 'callable' => array($this, 'parseTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'is not' => array('precedence' => 100, 'callable' => array($this, 'parseNotTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'..' => array('precedence' => 110, 'class' => 'Twig_Node_Expression_Binary_Range', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
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'**' => array('precedence' => 200, 'class' => 'Twig_Node_Expression_Binary_Power', 'associativity' => Twig_ExpressionParser::OPERATOR_RIGHT),
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),
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);
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}
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public function parseNotTestExpression(Twig_Parser $parser, $node)
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{
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return new Twig_Node_Expression_Unary_Not($this->parseTestExpression($parser, $node), $parser->getCurrentToken()->getLine());
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}
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public function parseTestExpression(Twig_Parser $parser, $node)
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{
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$stream = $parser->getStream();
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$name = $stream->expect(Twig_Token::NAME_TYPE);
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$arguments = null;
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if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
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$arguments = $parser->getExpressionParser()->parseArguments();
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}
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return new Twig_Node_Expression_Test($node, $name->getValue(), $arguments, $parser->getCurrentToken()->getLine());
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}
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/**
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* Returns the name of the extension.
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*
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* @return string The extension name
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*/
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public function getName()
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{
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return 'core';
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}
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}
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/**
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* Cycles over a value.
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*
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* @param ArrayAccess|array $values An array or an ArrayAccess instance
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* @param integer $i The cycle value
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*
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* @return string The next value in the cycle
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*/
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function twig_cycle($values, $i)
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{
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if (!is_array($values) && !$values instanceof ArrayAccess) {
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return $values;
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}
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return $values[$i % count($values)];
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}
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/**
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* Converts a date to the given format.
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*
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* <pre>
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* {{ post.published_at|date("m/d/Y") }}
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* </pre>
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*
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* @param DateTime|string $date A date
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* @param string $format A format
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* @param DateTimeZone|string $timezone A timezone
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*
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* @return string The formatter date
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*/
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function twig_date_format_filter($date, $format = 'F j, Y H:i', $timezone = null)
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{
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if (!$date instanceof DateTime) {
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if (ctype_digit((string) $date)) {
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$date = new DateTime('@'.$date);
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$date->setTimezone(new DateTimeZone(date_default_timezone_get()));
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} else {
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$date = new DateTime($date);
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}
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}
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if (null !== $timezone) {
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if (!$timezone instanceof DateTimeZone) {
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$timezone = new DateTimeZone($timezone);
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}
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$date->setTimezone($timezone);
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}
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return $date->format($format);
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}
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/**
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* URL encodes a string.
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*
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* @param string $url A URL
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* @param bool $raw true to use rawurlencode() instead of urlencode
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*
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* @return string The URL encoded value
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*/
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function twig_urlencode_filter($url, $raw = false)
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{
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if ($raw) {
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return rawurlencode($url);
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}
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return urlencode($url);
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}
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if (version_compare(PHP_VERSION, '5.3.0', '<')) {
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/**
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* JSON encodes a PHP variable.
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*
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* @param mixed $value The value to encode.
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* @param integer $options Not used on PHP 5.2.x
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*
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* @return mixed The JSON encoded value
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*/
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function twig_jsonencode_filter($value, $options = 0)
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{
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if ($value instanceof Twig_Markup) {
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$value = (string) $value;
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} elseif (is_array($value)) {
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array_walk_recursive($value, '_twig_markup2string');
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}
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return json_encode($value);
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}
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} else {
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/**
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* JSON encodes a PHP variable.
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*
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* @param mixed $value The value to encode.
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* @param integer $options Bitmask consisting of JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT
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*
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* @return mixed The JSON encoded value
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*/
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function twig_jsonencode_filter($value, $options = 0)
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{
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if ($value instanceof Twig_Markup) {
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$value = (string) $value;
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} elseif (is_array($value)) {
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array_walk_recursive($value, '_twig_markup2string');
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}
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return json_encode($value, $options);
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}
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}
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function _twig_markup2string(&$value)
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{
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if ($value instanceof Twig_Markup) {
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$value = (string) $value;
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}
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}
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/**
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* Merges an array with another one.
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*
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* <pre>
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* {% set items = { 'apple': 'fruit', 'orange': 'fruit' } %}
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*
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* {% set items = items|merge({ 'peugeot': 'car' }) %}
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*
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* {# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car' } #}
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* </pre>
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*
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* @param array $arr1 An array
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* @param array $arr2 An array
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*
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* @return array The merged array
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*/
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function twig_array_merge($arr1, $arr2)
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{
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if (!is_array($arr1) || !is_array($arr2)) {
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throw new Twig_Error_Runtime('The merge filter only work with arrays or hashes.');
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}
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return array_merge($arr1, $arr2);
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}
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/**
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* Joins the values to a string.
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*
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* The separator between elements is an empty string per default, you can define it with the optional parameter.
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*
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* <pre>
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* {{ [1, 2, 3]|join('|') }}
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* {# returns 1|2|3 #}
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*
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* {{ [1, 2, 3]|join }}
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* {# returns 123 #}
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* </pre>
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*
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* @param array $value An array
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* @param string $glue The separator
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*
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* @return string The concatenated string
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*/
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function twig_join_filter($value, $glue = '')
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{
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return implode($glue, (array) $value);
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}
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/**
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* Returns the value or the default value when it is undefined or empty.
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*
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* <pre>
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*
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* {{ var.foo|default('foo item on var is not defined') }}
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*
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* </pre>
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*
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* @param mixed $value A value
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* @param mixed $default The default value
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*
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* @param mixed The value or the default value;
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*/
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function twig_default_filter($value, $default = '')
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{
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if (twig_test_empty($value)) {
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return $default;
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} else {
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return $value;
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}
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}
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/**
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* Returns the keys for the given array.
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*
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* It is useful when you want to iterate over the keys of an array:
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*
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* <pre>
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* {% for key in array|keys %}
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* {# ... #}
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* {% endfor %}
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* </pre>
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*
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* @param array $array An array
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*
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* @return array The keys
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*/
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function twig_get_array_keys_filter($array)
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{
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if (is_object($array) && $array instanceof Traversable) {
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return array_keys(iterator_to_array($array));
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}
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if (!is_array($array)) {
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return array();
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}
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return array_keys($array);
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}
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/**
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* Reverses an array.
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*
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* @param array|Traversable $array An array or a Traversable instance
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*
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* return array The array reversed
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*/
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function twig_reverse_filter($array)
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{
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if (is_object($array) && $array instanceof Traversable) {
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return array_reverse(iterator_to_array($array));
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}
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if (!is_array($array)) {
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return array();
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}
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return array_reverse($array);
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}
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/**
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* Sorts an array.
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*
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* @param array $array An array
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*/
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function twig_sort_filter($array)
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{
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asort($array);
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return $array;
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}
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/* used internally */
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function twig_in_filter($value, $compare)
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{
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if (is_array($compare)) {
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return in_array($value, $compare);
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} elseif (is_string($compare)) {
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return false !== strpos($compare, (string) $value);
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} elseif (is_object($compare) && $compare instanceof Traversable) {
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return in_array($value, iterator_to_array($compare, false));
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}
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return false;
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}
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/**
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* Replaces placeholders in a string.
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*
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* <pre>
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* {{ "I like %this% and %that%."|replace({'%this%': foo, '%that%': "bar"}) }}
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* </pre>
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*
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* @param string $pattern A string
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* @param string $replacements The values for the placeholders
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*
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* @return string The string where the placeholders have been replaced
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*/
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function twig_strtr($pattern, $replacements)
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{
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return str_replace(array_keys($replacements), array_values($replacements), $pattern);
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}
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/**
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* Escapes a string.
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*
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* @param Twig_Environment $env A Twig_Environment instance
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* @param string $string The value to be escaped
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* @param string $type The escaping strategy
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* @param string $charset The charset
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*/
|
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function twig_escape_filter(Twig_Environment $env, $string, $type = 'html', $charset = null)
|
|
{
|
|
if (is_object($string) && $string instanceof Twig_Markup) {
|
|
return $string;
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}
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|
|
if (!is_string($string) && !(is_object($string) && method_exists($string, '__toString'))) {
|
|
return $string;
|
|
}
|
|
|
|
if (null === $charset) {
|
|
$charset = $env->getCharset();
|
|
}
|
|
|
|
switch ($type) {
|
|
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 $string;
|
|
|
|
case 'html':
|
|
return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
|
|
|
|
default:
|
|
throw new Twig_Error_Runtime(sprintf('Invalid escape type "%s".', $type));
|
|
}
|
|
}
|
|
|
|
/* used internally */
|
|
function twig_escape_filter_is_safe(Twig_Node $filterArgs)
|
|
{
|
|
foreach ($filterArgs as $arg) {
|
|
if ($arg instanceof Twig_Node_Expression_Constant) {
|
|
return array($arg->getAttribute('value'));
|
|
} else {
|
|
return array();
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
return array('html');
|
|
}
|
|
|
|
if (function_exists('iconv')) {
|
|
function _twig_convert_encoding($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 PHP variable.
|
|
*
|
|
* @param Twig_Environment $env A Twig_Environment instance
|
|
* @param mixed $thing A PHP 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 PHP variable.
|
|
*
|
|
* @param Twig_Environment $env A Twig_Environment instance
|
|
* @param mixed $thing A PHP 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($seq)
|
|
{
|
|
if (is_array($seq) || (is_object($seq) && $seq instanceof Traversable)) {
|
|
return $seq;
|
|
} else {
|
|
return array();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks that a variable points to the same memory address than another one.
|
|
*
|
|
* <pre>
|
|
* {% if foo.attribute is sameas(false) %}
|
|
* the foo attribute really is the ``false`` PHP value
|
|
* {% endif %}
|
|
* </pre>
|
|
*
|
|
* @param mixed $value A PHP variable
|
|
* @param mixed $test The PHP variable to test against
|
|
*
|
|
* @return Boolean true if the values are the same, false otherwise
|
|
*/
|
|
function twig_test_sameas($value, $test)
|
|
{
|
|
return $value === $test;
|
|
}
|
|
|
|
/**
|
|
* Checks that a variable is null.
|
|
*
|
|
* <pre>
|
|
* {{ var is none }}
|
|
* </pre>
|
|
*
|
|
* @param mixed $value a PHP variable.
|
|
*
|
|
* @return Boolean true if the value is null, false otherwise
|
|
*/
|
|
function twig_test_none($value)
|
|
{
|
|
return null === $value;
|
|
}
|
|
|
|
/**
|
|
* Checks if a variable is divisible by a number.
|
|
*
|
|
* <pre>
|
|
* {% if loop.index is divisibleby(3) %}
|
|
* </pre>
|
|
*
|
|
* @param integer $value A PHP value
|
|
* @param integer $num A number
|
|
*
|
|
* @return Boolean true if the value is divisible by the number, false otherwise
|
|
*/
|
|
function twig_test_divisibleby($value, $num)
|
|
{
|
|
return 0 == $value % $num;
|
|
}
|
|
|
|
/**
|
|
* Checks if a number is even.
|
|
*
|
|
* <pre>
|
|
* {{ var is even }}
|
|
* </pre>
|
|
*
|
|
* @param integer $value An integer
|
|
*
|
|
* @return Boolean true if the value is even, false otherwise
|
|
*/
|
|
function twig_test_even($value)
|
|
{
|
|
return $value % 2 == 0;
|
|
}
|
|
|
|
/**
|
|
* Checks if a number is odd.
|
|
*
|
|
* <pre>
|
|
* {{ var is odd }}
|
|
* </pre>
|
|
*
|
|
* @param integer $value An integer
|
|
*
|
|
* @return Boolean true if the value is odd, false otherwise
|
|
*/
|
|
function twig_test_odd($value)
|
|
{
|
|
return $value % 2 == 1;
|
|
}
|
|
|
|
/**
|
|
* Checks if a variable is the exact same value as a constant.
|
|
*
|
|
* <pre>
|
|
* {% if post.status is constant('Post::PUBLISHED') %}
|
|
* the status attribute is exactly the same as Post::PUBLISHED
|
|
* {% endif %}
|
|
* </pre>
|
|
*
|
|
* @param mixed $value A PHP value
|
|
* @param mixed $constant The constant to test against
|
|
*
|
|
* @return Boolean true if the value is the same as the constant, false otherwise
|
|
*/
|
|
function twig_test_constant($value, $constant)
|
|
{
|
|
return constant($constant) === $value;
|
|
}
|
|
|
|
/**
|
|
* Checks if a variable is defined in the current context.
|
|
*
|
|
* <pre>
|
|
* {# defined works with variable names #}
|
|
* {% if foo is defined %}
|
|
* {# ... #}
|
|
* {% endif %}
|
|
* </pre>
|
|
*
|
|
* @param mixed $name A PHP variable
|
|
* @param array $context The current context
|
|
*
|
|
* @return Boolean true if the value is defined, false otherwise
|
|
*/
|
|
function twig_test_defined($name, $context)
|
|
{
|
|
return array_key_exists($name, $context);
|
|
}
|
|
|
|
/**
|
|
* 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 $value A PHP variable
|
|
*
|
|
* @return Boolean true if the value is empty, false otherwise
|
|
*/
|
|
function twig_test_empty($value)
|
|
{
|
|
if ($value instanceof Countable) {
|
|
return 0 == count($value);
|
|
}
|
|
return false === $value || (empty($value) && '0' != $value);
|
|
}
|
|
|