DomDocumentType->public_id
    (no version information, might be only in CVS)
DomDocumentType->public_id -- 
     Returns public id of document type
    
Description
string 
DomDocumentType->public_id ( void )
     This function returns the public id of the document type.
    
     The following example echos nothing.
     
Example 1. 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(); ?>
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