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 /storage/content/26/147626/vanjaswebb.se/public_html/OLD/incl/content/bth/phpmvc/kmom0810/guest/CodeIgniter/system/database/drivers/mysql/mysql_driver.php:91 Stack trace: #0 /storage/content/26/147626/vanjaswebb.se/public_html/OLD/incl/content/bth/phpmvc/kmom0810/guest/CodeIgniter/system/database/DB_driver.php(115): CI_DB_mysql_driver->db_pconnect() #1 /storage/content/26/147626/vanjaswebb.se/public_html/OLD/incl/content/bth/phpmvc/kmom0810/guest/CodeIgniter/system/database/DB.php(148): CI_DB_driver->initialize() #2 /storage/content/26/147626/vanjaswebb.se/public_html/OLD/incl/content/bth/phpmvc/kmom0810/guest/CodeIgniter/system/core/Loader.php(346): DB(Array, NULL) #3 /storage/content/26/147626/vanjaswebb.se/public_html/OLD/incl/content/bth/phpmvc/kmom0810/guest/CodeIgniter/application/models/guestbook_model.php(6): CI_Loader->database() #4 /storage/content/26/147626/vanjaswebb.se/public_html/OLD/incl/content/bth/phpmvc/kmom0810/guest/CodeIgniter in /storage/content/26/147626/vanjaswebb.se/public_html/OLD/incl/content/bth/phpmvc/kmom0810/guest/CodeIgniter/system/database/drivers/mysql/mysql_driver.php on line 91