DOMDocument->getElementById()
(no version information, might be only in CVS)
DOMDocument->getElementById() -- Searches for an element with a certain id
Description
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.
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";
?>
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The above example will output: The element whose id is books is: chapter |
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