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PHP | DOMElement hasAttribute() Function

Last Updated : 05 Mar, 2020
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The DOMElement::hasAttribute() function is an inbuilt function in PHP which is used to know whether attribute with a specific name exists as a member of the element. Syntax: 
bool DOMElement::hasAttribute( string $name )
Parameters: This function accepts a single parameter $name which holds the name of attribute. Return Value: This function returns TRUE on success or FALSE on failure. Below given programs illustrate the DOMElement::hasAttribute() function in PHP: Program 1: php 
<?php

// Create a new DOMDocument
$dom = new DOMDocument();

// Load the XML
$dom->loadXML("<?xml version=\"1.0\"?>
<root>
    <div>
        <!-- id attribute is there -->
        <p id=\"prog\"> HELLO </p>
    </div>
</root>");

// Get the elements
$nodeList = $dom->getElementsByTagName('p');

foreach ($nodeList as $node) {
    if($node->hasAttribute('id')) {
        echo "Yes, id attribute is there.";
    }
}
?>
Output: 
Yes, id attribute is there.
Program 2: php 
<?php

// Create a new DOMDocument
$dom = new DOMDocument();

// Load the XML
$dom->loadXML("<?xml version=\"1.0\"?>
<root>
    <div>
        <!-- id attribute is missing -->
        <p> HELLO </p>
    </div>
</root>");

// Get the elements
$nodeList = $dom->getElementsByTagName('p');
foreach ($nodeList as $node) {
    if(!$node->hasAttribute('id')) {
        echo "No, id attribute isn't there.";
    }
}
?>
Output: 
No, id attribute isn't there.
Reference: https://www.php.net/manual/en/domelement.hasattribute.php

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