DOMDocument::getElementById
(No version information available, might be only in CVS)
DOMDocument::getElementById — Searches for an element with a certain id
Description
DOMElement DOMDocument::getElementById
(
string $elementId
)
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.
Parameters
-
elementId
-
The unique id value for an element.
Return Values
Returns the DOMElement or NULL if the element is
not found.
Examples
Example #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";
?>
The above example will output:
The element whose id is books is: chapter
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