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DOMImplementation::hasFeature

(PHP 5, PHP 7, PHP 8)

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

Descrizione

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

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.

Elenco dei parametri

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.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento.

Log delle modifiche

Versione Descrizione
8.0.0 Calling this function statically will now throw an Error. Previously, an E_DEPRECATED was raised.

Esempi

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";
}
}

?>

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