PHP error happened

Technical information
Error type8192
Error descriptionmysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead
URLwww.grrrlzines.net/zineDB/articles_has_authors_list.php?
Error file/home/grrrlzin/public_html/zineDB/include/dbconnection.php
Error line9
SQL query