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PHP DOMImplementation::hasFeature

PHP original manual for DOMImplementation::hasFeature [ show | php.net ]

DOMImplementation::hasFeature

(PHP 5, PHP 7)

DOMImplementation::hasFeature — Test if the DOM implementation implements a specific feature

Description

public bool DOMImplementation::hasFeature ( string $feature , string $version )

Test if the DOM implementation implements a specific feature.

You can find a list of all features in the » Conformance section of the DOM specification.

Parameters

feature

The feature to test.

version

The version number of the feature to test. In level 2, this can be either 2.0 or 1.0.

Return Values

Returns TRUE on success or FALSE on failure.

Errors/Exceptions

This method may be called statically, but will issue an E_STRICT error.

Examples

Example #1 Testing your DOM Implementation

<?php

$features = array(
  'Core'           => 'Core module',
  'XML'            => 'XML module',
  'HTML'           => 'HTML module',
  'Views'          => 'Views module',
  'Stylesheets'    => 'Style Sheets module',
  'CSS'            => 'CSS module',
  'CSS2'           => 'CSS2 module',
  'Events'         => 'Events module',
  'UIEvents'       => 'User interface Events module',
  'MouseEvents'    => 'Mouse Events module',
  'MutationEvents' => 'Mutation Events module',
  'HTMLEvents'     => 'HTML Events module',
  'Range'          => 'Range module',
  'Traversal'      => 'Traversal module'
);
               
foreach ($features as $key => $name) {
  if (DOMImplementation::hasFeature($key, '2.0')) {
    echo "Has feature $name\n";
  } else {
    echo "Missing feature $name\n";
  }
}

?>

See Also