PHP | DOMDocument getElementById() Function
Last Updated :
20 Feb, 2020
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The DOMDocument::getElementById() function is an inbuilt function in PHP which is used to search for an element with a certain id.
Syntax:
php
Output:
php
Output:
DOMElement DOMDocument::getElementById( string $elementId )Parameters:This function accepts a single parameter $elementId which holds the id to search for. Return Value: This function returns the DOMElement or NULL if the element is not found. Below given programs illustrate the DOMDocument::getElementById() function in PHP: Program 1: In this program we will get the tagname of element with certain id.
<?php
// Create a new DOM Document
$dom = new DOMDocument('1.0', 'iso-8859-1');
// Enable validate on parse
$dom->validateOnParse = true;
// Create a div element
$element = $dom->appendChild(new DOMElement('div'));
// Create a id attribute to div
$attr = $element->setAttributeNode(
new DOMAttr('id', 'my_id'));
// Set that attribute as id
$element->setIDAttribute('id', true);
// Get the tag name
$tagname = $dom->getElementById('my_id')->tagName;
echo $tagname;
?>
div // Because id 'my_id' is applied to div tag.Program 2: In this program we will get the content of element with certain id.
<?php
// Create a new DOM Document
$dom = new DOMDocument('1.0', 'iso-8859-1');
// Enable validate on parse
$dom->validateOnParse = true;
// Create a div element
$element = $dom->appendChild(new DOMElement('div',
'Hey, this is the text content of the div element.'));
// Create a id attribute to div
$attr = $element->setAttributeNode(
new DOMAttr('id', 'my_id'));
// Set that attribute as id
$element->setIDAttribute('id', true);
// Get the tag content
$tagcontent = $dom->getElementById('my_id')->textContent;
echo $tagcontent;
?>
Hey, this is the text content of the div element.Reference: https://www.php.net/manual/en/domdocument.getelementbyid.php
