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.bdr.cybernetic-technologies.com/Birth_Registration_Details_list.php?pagesize=500
Error file/home1/cyberne1/public_html/bdr/include/dbconnection.php
Error line9
SQL query