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
