DOMAttr::isId

(PHP 5, PHP 7)

Checks if attribute is a defined ID

public bool DOMAttr::isId ( void )

This function checks if the attribute is a defined ID.

According to the DOM standard this requires a DTD which defines the attribute ID to be of type ID. You need to validate your document with DOMDocument::validate or DOMDocument::validateOnParse before using this function.

Returns:

Returns TRUE on success or FALSE on failure.

Examples:

DOMAttr::isId() Example

<?php
 
$doc = new DomDocument;
 
// We need to validate our document before refering to the id
$doc->validateOnParse = true;
$doc->Load('book.xml');
 
// We retrieve the attribute named id of the chapter element
$attr = $doc->getElementsByTagName('chapter')->item(0)->getAttributeNode('id');
 
var_dump($attr->isId()); // bool(true)
 
?>

Links:

http://php.net/manual/en/domattr.isid.php

doc_php

2025-01-10 15:47:30

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