DOMDocument::getElementById
(No version information available, might be only in CVS)
DOMDocument::getElementById — Searches for an element with a certain id
Описание
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.
Список параметров
- elementId
-
The unique id value for an element.
Возвращаемые значения
Returns the DOMElement or NULL if the element is not found.
Примеры
Пример #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";
?>
Результат выполнения данного примера:
The element whose id is books is: chapter
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