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# DomDocumentType->system_id

(no version information, might be only in CVS)

DomDocumentType->system_id -- Returns system id of document type

## Description

string DomDocumentType->system_id ( void)

Returns the system id of the document type.

The following example echos '/share/sgml/Norman_Walsh/db3xml10/db3xml10.dtd'.

Example 1. Retrieving the system id
    <?php
    include("example.inc");

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

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

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DomDocumentType->public_id | Up | DomElement->get_attribute_node