PHP | DOMElement hasAttribute() Function

<?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.";
    }
}
?>

<?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.";
    }
}
?>