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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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