PHP 7.0.6 Released

    DOMImplementation::createDocumentType

    (PHP 5, PHP 7)

    DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object

    Description

    public DOMDocumentType DOMImplementation::createDocumentType ([ string $qualifiedName = NULL [, string $publicId = NULL [, string $systemId = NULL ]]] )

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

    Parameters

    qualifiedName

    The qualified name of the document type to create.

    publicId

    The external subset public identifier.

    systemId

    The external subset system identifier.

    Return Values

    A new DOMDocumentType node with its ownerDocument set to NULL.

    Errors/Exceptions

    DOM_NAMESPACE_ERR

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

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

    Examples

    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();

    ?>

    The above example will output:

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

    See Also

    User Contributed Notes

    until-all-bytes-are-free at example dot org
    5 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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