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编辑当前文件:/home/qrafawbu/lugarcollectibles.com/system/library/template/Twig/Node/Expression/Test/Null.php
<?php /* * This file is part of Twig. * * (c) 2011 Fabien Potencier * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ /** * Checks that a variable is null. * * <pre> * {{ var is none }} * </pre> * * @author Fabien Potencier <fabien@symfony.com> */ class Twig_Node_Expression_Test_Null extends Twig_Node_Expression_Test { public function compile(Twig_Compiler $compiler) { $compiler ->raw('(null === ') ->subcompile($this->getNode('node')) ->raw(')') ; } }