DomDocumentType::public_id

Returns public id of document type

&reftitle.description; `string` `DomDocumentType::public_id`

This function returns the public id of the document type.

&reftitle.returnvalues;

Returns the public id of the `DomDocumentType`, as a string.

&reftitle.examples;

The following example echos nothing.

### Retrieving the public id

    <?php
    include("example.inc");

    if (!$dom = domxml_open_mem($xmlstr)) {
      echo "Error while parsing the document\n";
      exit;
    }

    $doctype = $dom->doctype();
    echo $doctype->public_id();
    ?>

## Migrating to PHP 5

Use the `publicId` property of the `DOMDocumentType` object.