A PHP Error was encountered

Severity: Notice

Message: Only variables should be assigned by reference

Filename: core/Loader.php

Line Number: 74

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /home/newyalechina/new.yalechina.org/system/codeigniter/system/database/drivers/mysql/mysql_driver.php:73 Stack trace: #0 /home/newyalechina/new.yalechina.org/system/codeigniter/system/database/DB_driver.php(115): CI_DB_mysql_driver->db_connect() #1 /home/newyalechina/new.yalechina.org/system/codeigniter/system/database/DB_driver.php(450): CI_DB_driver->initialize() #2 /home/newyalechina/new.yalechina.org/system/codeigniter/system/database/DB_driver.php(299): CI_DB_driver->simple_query('SELECT *\nFROM (...') #3 /home/newyalechina/new.yalechina.org/system/codeigniter/system/database/DB_active_rec.php(1066): CI_DB_driver->query('SELECT *\nFROM (...') #4 /home/newyalechina/new.yalechina.org/system/expressionengine/core/EE_Config.php(211): CI_DB_active_record->get_where('sites', Array) #5 /home/newyalechina/new.yalechina.org/system/expressionengine/libraries/Core.php(134): EE_Config->site_prefs('') #6 /home/newyalechina/new.yalechina.org/system/express in /home/newyalechina/new.yalechina.org/system/codeigniter/system/database/drivers/mysql/mysql_driver.php on line 73