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    DOMImplementation::createDocumentType

    (PHP 5, PHP 7, PHP 8)

    DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object

    Beschreibung

    public DOMImplementation::createDocumentType(string $qualifiedName, string $publicId = "", string $systemId = ""): DOMDocumentType|false

    Creates an empty DOMDocumentType object. Entity declarations and notations are not made available. Entity reference expansions and default attribute additions do not occur.

    Parameter-Liste

    qualifiedName

    The qualified name of the document type to create.

    publicId

    The external subset public identifier.

    systemId

    The external subset system identifier.

    Rückgabewerte

    A new DOMDocumentType node with its ownerDocument set to null or false on error.

    Fehler/Exceptions

    DOM_NAMESPACE_ERR

    Raised if there is an error with the namespace, as determined by qualifiedName.

    Changelog

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

    Beispiele

    Beispiel #1 Creating a document with an attached DTD

    <?php

    // Creates an instance of the DOMImplementation class
    $imp = new DOMImplementation;

    // Creates a DOMDocumentType instance
    $dtd = $imp->createDocumentType('graph', '', 'graph.dtd');

    // Creates a DOMDocument instance
    $dom = $imp->createDocument("", "", $dtd);

    // Set other properties
    $dom->encoding = 'UTF-8';
    $dom->standalone = false;

    // Create an empty element
    $element = $dom->createElement('graph');

    // Append the element
    $dom->appendChild($element);

    // Retrieve and print the document
    echo $dom->saveXML();

    ?>

    Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE graph SYSTEM "graph.dtd">
<graph/>

    Siehe auch

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    User Contributed Notes 1 note

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    until-all-bytes-are-free at example dot org
    13 years ago
    I had problems to use a DTD from a file. It needed to be resolved relatively and it contained characters that made DomDocument failed to resolve the file.

    Encoding and an absolute filename did not help much. So I used the data:// streamwrapper ( http://php.net/manual/en/wrappers.data.php ) as a work-around:

    <?php

    // relative or absolute filename
    $path = '...';

    // convert file contents into a filename
    $data = file_get_contents($path);
    $systemId = 'data://text/plain;base64,'.base64_encode($data);

    // ...

    // Creates a DOMDocumentType instance
    $dtd = $aImp->createDocumentType('qualified name', '', $systemId);

    ?>

    Works like a charm.
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