Fatal error: Uncaught Error: Call to undefined function mysql_pconnect() in /opt/lampp/htdocs/dhtmlxSuite_v5.1/samples/dhtmlxTree/04_dataprocessor/php/update.php:18 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/dhtmlxSuite_v5.1/samples/dhtmlxTree/04_dataprocessor/php/update.php on line 18