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Name.php (2976B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) 2009 Fabien Potencier
      7  * (c) 2009 Armin Ronacher
      8  *
      9  * For the full copyright and license information, please view the LICENSE
     10  * file that was distributed with this source code.
     11  */
     12 class Twig_Node_Expression_Name extends Twig_Node_Expression
     13 {
     14     protected $specialVars = array(
     15         '_self' => '$this',
     16         '_context' => '$context',
     17         '_charset' => '$this->env->getCharset()',
     18     );
     19 
     20     public function __construct($name, $lineno)
     21     {
     22         parent::__construct(array(), array('name' => $name, 'is_defined_test' => false, 'ignore_strict_check' => false, 'always_defined' => false), $lineno);
     23     }
     24 
     25     public function compile(Twig_Compiler $compiler)
     26     {
     27         $name = $this->getAttribute('name');
     28 
     29         $compiler->addDebugInfo($this);
     30 
     31         if ($this->getAttribute('is_defined_test')) {
     32             if ($this->isSpecial()) {
     33                 $compiler->repr(true);
     34             } else {
     35                 $compiler->raw('array_key_exists(')->repr($name)->raw(', $context)');
     36             }
     37         } elseif ($this->isSpecial()) {
     38             $compiler->raw($this->specialVars[$name]);
     39         } elseif ($this->getAttribute('always_defined')) {
     40             $compiler
     41                 ->raw('$context[')
     42                 ->string($name)
     43                 ->raw(']')
     44             ;
     45         } else {
     46             // remove the non-PHP 5.4 version when PHP 5.3 support is dropped
     47             // as the non-optimized version is just a workaround for slow ternary operator
     48             // when the context has a lot of variables
     49             if (PHP_VERSION_ID >= 50400) {
     50                 // PHP 5.4 ternary operator performance was optimized
     51                 $compiler
     52                     ->raw('(isset($context[')
     53                     ->string($name)
     54                     ->raw(']) ? $context[')
     55                     ->string($name)
     56                     ->raw('] : ')
     57                 ;
     58 
     59                 if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
     60                     $compiler->raw('null)');
     61                 } else {
     62                     $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
     63                 }
     64             } else {
     65                 $compiler
     66                     ->raw('$this->getContext($context, ')
     67                     ->string($name)
     68                 ;
     69 
     70                 if ($this->getAttribute('ignore_strict_check')) {
     71                     $compiler->raw(', true');
     72                 }
     73 
     74                 $compiler
     75                     ->raw(')')
     76                 ;
     77             }
     78         }
     79     }
     80 
     81     public function isSpecial()
     82     {
     83         return isset($this->specialVars[$this->getAttribute('name')]);
     84     }
     85 
     86     public function isSimple()
     87     {
     88         return !$this->isSpecial() && !$this->getAttribute('is_defined_test');
     89     }
     90 }