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    DOMImplementation::createDocumentType

    (PHP 5, PHP 7, PHP 8)

    DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object

    Descrizione

    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.

    Elenco dei parametri

    qualifiedName

    The qualified name of the document type to create.

    publicId

    The external subset public identifier.

    systemId

    The external subset system identifier.

    Valori restituiti

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

    Errori/Eccezioni

    DOM_NAMESPACE_ERR

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

    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 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();

    ?>

    Il precedente esempio visualizzerà:

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

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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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