DOMDocument->getElementById()

(no version information, might be only in CVS)

DOMDocument->getElementById() -- Searches for an element with a certain id

Beschreibung

class DOMDocument {

DOMElement getElementById ( string elementId )

}

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 later case, you will need to validate your document with DOMDocument->validate() or DOMDocument->validateOnParse before using this function.

Parameter Liste

elementId

The unique id value for an element.

Rückgabewerte

Returns the DOMElement or NULL if the element is not found.

Beispiele

Beispiel 1. DOMDocument->getElementById() Example

<?php

$doc
= new DomDocument;

// We need to validate our document before refering to the id
$doc->validateOnParse = true;
$doc->Load('book.xml');

echo
"The element whose id is books is: " . $doc->getElementById('books')->tagName . "\n";

?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

The element whose id is books is: chapter

Siehe auch

DOMDocument->getElementsByTagName()