note 60188 added to ref.dom

The project I'm currently working on uses XPaths to dynamically navigate through chunks of an XML file. I couldn't find any PHP code on the net that would build the XPath to a node for me, so I wrote my own function. Turns out it wasn't as hard as I thought it might be (yay recursion), though it does entail using some PHP shenanigans... Hopefully it'll save someone else the trouble of reinventing this wheel. <?php 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( "" ); } } ?> ---- Manual Page -- http://www.php.net/manual/en/ref.dom.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+60188 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+60188&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+60188&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+60188&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+60188&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+60188&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+60188&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+60188&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+60188&report=yes Search -- http://master.php.net/manage/user-notes.php