PHP: DOM Functions - Manual

HP: DOM Functions - Manual

function getNodeXPath( $node ) {
// REMEMBER THAT XPATHS USE BASE-1 INSTEAD OF BASE-0!!!

// Get the index for the current node by looping through the siblings.
$parentNode = $node->parentNode;
if( $parentNode != null ) {
$nodeIndex = 0;
do {
$testNode = $parentNode->childNodes->item( $nodeIndex );
$nodeName = $testNode->nodeName;
$nodeIndex++;

// PHP trickery! Here we create a counter based on the node
// name of the test node to use in the XPath.
if( !isset( $$nodeName ) ) $$nodeName = 1;
else $$nodeName++;

// Failsafe return value.
if( $nodeIndex > $parentNode->childNodes->length ) return( "/" );
} while( !$node->isSameNode( $testNode ) );

// Recursively get the XPath for the parent.
return( getNodeXPath( $parentNode ) . "/{$node->nodeName}[{$$nodeName}]" );
} else {
// Hit the root node! Note that the slash is added when
// building the XPath, so we return just an empty string.
return( "" );
}
}
?>