Returns the value or the default value when it is undefined or empty.
<pre> {{ var.foo|default('foo item on var is not defined') }} </pre>
@package twig @author Fabien Potencier <fabien@symfony.com>
Expanded class hierarchy of Twig_Node_Expression_Filter_Default
class Twig_Node_Expression_Filter_Default extends Twig_Node_Expression_Filter {
public function __construct(Twig_NodeInterface $node, Twig_Node_Expression_Constant $filterName, Twig_NodeInterface $arguments, $lineno, $tag = null) {
$default = new Twig_Node_Expression_Filter($node, new Twig_Node_Expression_Constant('_default', $node
->getLine()), $arguments, $node
->getLine());
if ('default' === $filterName
->getAttribute('value') && ($node instanceof Twig_Node_Expression_Name || $node instanceof Twig_Node_Expression_GetAttr)) {
$test = new Twig_Node_Expression_Test_Defined(clone $node, 'defined', new Twig_Node(), $node
->getLine());
$false = count($arguments) ? $arguments
->getNode(0) : new Twig_Node_Expression_Constant('', $node
->getLine());
$node = new Twig_Node_Expression_Conditional($test, $default, $false, $node
->getLine());
}
else {
$node = $default;
}
parent::__construct($node, $filterName, $arguments, $lineno, $tag);
}
public function compile(Twig_Compiler $compiler) {
$compiler
->subcompile($this
->getNode('node'));
}
}
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
Twig_Node:: |
protected | property | ||
Twig_Node:: |
protected | property | ||
Twig_Node:: |
protected | property | ||
Twig_Node:: |
protected | property | ||
Twig_Node:: |
public | function | ||
Twig_Node:: |
public | function | Gets an attribute. | |
Twig_Node:: |
public | function | ||
Twig_Node:: |
public | function |
Overrides Twig_NodeInterface:: |
|
Twig_Node:: |
public | function | Gets a node by name. | |
Twig_Node:: |
public | function |
Overrides Twig_NodeInterface:: |
|
Twig_Node:: |
public | function | Returns true if the attribute is defined. | |
Twig_Node:: |
public | function | Returns true if the node with the given identifier exists. | |
Twig_Node:: |
public | function | Removes an attribute. | |
Twig_Node:: |
public | function | Removes a node by name. | |
Twig_Node:: |
public | function | Sets an attribute. | |
Twig_Node:: |
public | function | Sets a node. | |
Twig_Node:: |
public | function | ||
Twig_Node:: |
public | function | ||
Twig_Node_Expression_Filter:: |
protected | function | ||
Twig_Node_Expression_Filter_Default:: |
public | function |
Compiles the node to PHP. Overrides Twig_Node_Expression_Filter:: |
|
Twig_Node_Expression_Filter_Default:: |
public | function |
Constructor. Overrides Twig_Node_Expression_Filter:: |