Verzeichnisstruktur phpBB-3.3.15
- Veröffentlicht
- 28.08.2024
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DefaultFilter.php
01 <?php
02
03 /*
04 * This file is part of Twig.
05 *
06 * (c) Fabien Potencier
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Twig\Node\Expression\Filter;
13
14 use Twig\Compiler;
15 use Twig\Node\Expression\ConditionalExpression;
16 use Twig\Node\Expression\ConstantExpression;
17 use Twig\Node\Expression\FilterExpression;
18 use Twig\Node\Expression\GetAttrExpression;
19 use Twig\Node\Expression\NameExpression;
20 use Twig\Node\Expression\Test\DefinedTest;
21 use Twig\Node\Node;
22
23 /**
24 * Returns the value or the default value when it is undefined or empty.
25 *
26 * {{ var.foo|default('foo item on var is not defined') }}
27 *
28 * @author Fabien Potencier <fabien@symfony.com>
29 */
30 class DefaultFilter extends FilterExpression
31 {
32 public function __construct(Node $node, ConstantExpression $filterName, Node $arguments, int $lineno, string $tag = null)
33 {
34 $default = new FilterExpression($node, new ConstantExpression('default', $node->getTemplateLine()), $arguments, $node->getTemplateLine());
35
36 if ('default' === $filterName->getAttribute('value') && ($node instanceof NameExpression || $node instanceof GetAttrExpression)) {
37 $test = new DefinedTest(clone $node, 'defined', new Node(), $node->getTemplateLine());
38 $false = \count($arguments) ? $arguments->getNode(0) : new ConstantExpression('', $node->getTemplateLine());
39
40 $node = new ConditionalExpression($test, $default, $false, $node->getTemplateLine());
41 } else {
42 $node = $default;
43 }
44
45 parent::__construct($node, $filterName, $arguments, $lineno, $tag);
46 }
47
48 public function compile(Compiler $compiler)
49 {
50 $compiler->subcompile($this->getNode('node'));
51 }
52 }
53
54 class_alias('Twig\Node\Expression\Filter\DefaultFilter', 'Twig_Node_Expression_Filter_Default');
55