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    DOMElement::toggleAttribute

    (PHP 8 >= 8.3.0)

    DOMElement::toggleAttribute — Toggle attribute

    说明

    public DOMElement::toggleAttribute(string $qualifiedName, ?bool $force = null): bool

    Toggle the attribute.

    参数

    qualifiedName

    The qualified name of the attribute.

    force

    • if null, the function will toggle the attribute.
    • if true, the function adds the attribute.
    • if false, the function removes the attribute.

    返回值

    Returns true if the attribute is present after finishing the call, false otherwise.

    示例

    示例 #1 DOMElement::toggleAttribute() example

    <?php

    $dom     = new DOMDocument();
    $dom->loadXML("<?xml version='1.0'?><container selected=\"\"/>");

    var_dump($dom->documentElement->toggleAttribute('selected'));
    echo     $dom->saveXML() . PHP_EOL;

    var_dump($dom->documentElement->toggleAttribute('selected'));
    echo     $dom->saveXML();
    ?>

    以上示例会输出：

    bool(false)
<?xml version="1.0"?>
<container/>

bool(true)
<?xml version="1.0"?>
<container selected=""/>
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