PHP | DOMNode isSupported() Function

The DOMNode::isSupported() function is an inbuilt function in PHP which is used to check if the asked feature is supported for the specified version.

Syntax:

bool DOMNode::isSupported( string $feature, string $version )

Parameters: This function accepts two parameters as mentioned above and described below:

• $feature: It specifies the feature to test.
• $version: It specifies the version of feature to test.

Return Value: This function returns TRUE on success or FALSE on failure.

Below examples illustrate the DOMNode::isSupported() function in PHP:

Example 1:

<?php

// Write the feature name
$featureName1 = "Core";

// Check if it exists
$node1 = new DOMNode();
$isSupported1 = $node1->isSupported($featureName1, '1.0');
if ($isSupported1) {
    echo "Has feature $featureName1 module<br>";
}

// Write another feature name
$featureName2 = "XML";

// Check if it exists
$isSupported2 = $node1->isSupported($featureName2, '2.0');
if ($isSupported2) {
    echo "Has feature $featureName2 module";
}
?>

Output:

Has feature Core module
Has feature XML module

Example 2:

<?php

// Write the feature name
$featureName1 = "Events";

// Check if it exists
$node1 = new DOMNode();
$isSupported1 = $node1->isSupported($featureName1, '1.0');
if (!$isSupported1) {
    echo "Doesn't has feature $featureName1 module<br>";
}

// Write another feature name
$featureName2 = "CSS";

// Check if it exists
$isSupported2 = $node1->isSupported($featureName2, '2.0');
if (!$isSupported2) {
    echo "Doesn't has feature $featureName2 module";
}
?>

Output:

Doesn't has feature Events module
Doesn't has feature CSS module

Reference: https://www.php.net/manual/en/domnode.issupported.php