A PHP Error was encountered

Severity: Notice

Message: Only variable references should be returned by reference

Filename: core/Common.php

Line Number: 257

Fatal error: Uncaught Error: Call to undefined function mysql_pconnect() in /home/kfinance/public_html/system/database/drivers/mysql/mysql_driver.php:91 Stack trace: #0 /home/kfinance/public_html/system/database/DB_driver.php(115): CI_DB_mysql_driver->db_pconnect() #1 /home/kfinance/public_html/system/database/DB.php(148): CI_DB_driver->initialize() #2 /home/kfinance/public_html/webapp/config/routes.php(89): DB() #3 /home/kfinance/public_html/system/core/Router.php(138): include('/home/kfinance/...') #4 /home/kfinance/public_html/system/core/CodeIgniter.php(173): CI_Router->_set_routing() #5 /home/kfinance/public_html/index.php(202): require_once('/home/kfinance/...') #6 {main} thrown in /home/kfinance/public_html/system/database/drivers/mysql/mysql_driver.php on line 91