DOMDocument::getElementById
PHP function
Edit on GitHub ✎
(PHP 5, PHP 7, PHP 8)
Searches for an element with a certain id
Description
DOMDocument::getElementById(string $elementId): DOMElement|null
This function is similar to domdocument.getelementsbytagname but searches for an element with a given id.
For this function to work, you will need either to set some ID attributes with domelement.setidattribute or a DTD which defines an attribute to be of type ID. In the latter case, you will need to validate your document with domdocument.validate or DOMDocument::$validateOnParse before using this function.
Parameters
elementIdThe unique id value for an element.
Return Values
Returns the DOMElement or null if the element is not found.
Examples
DOMDocument::getElementById() Example
Example
php
<?php
$doc = new DomDocument;
// We need to validate our document before referring to the id
$doc->validateOnParse = true;
$doc->load('examples/book.xml');
echo "The element whose id is 'php-basics' is: " . $doc->getElementById('php-basics')->tagName . "\n";
?>The above example will output:
output
The element whose id is 'php-basics' is: book See Also
DOMDocument::getElementsByTagName