Warning: mysql_connect() [function.mysql-connect]: Headers and client library minor version mismatch. Headers:100508 Library:30120 in /home/ewtstrainingcom/public_html/data/include/dbconnection.php on line 9

php error happened

	Technical information
Error type	2
Error description	Cannot modify header information - headers already sent by (output started at /home/ewtstrainingcom/public_html/data/include/dbconnection.php:9)
URL	ewtstraining.com.au/data/login.php?
Error file	/home/ewtstrainingcom/public_html/data/include/commonfunctions.php
Error line	4003
SQL query

Call stack
	File: line	Function	Arguments
#0.	include/commonfunctions.php:4003	header	1. Cache-Control: no-cache, no-store, max-age=0, must-revalidate;
#1.	include/commonfunctions.php:4003	add_nocache_headers	N/A
#2.	login.php:7	Global scope	N/A