มันขึ้นเเบบนี้

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in C:\xampp\htdocs\Project_end\connect.php:7 Stack trace: #0 C:\xampp\htdocs\Project_end\a_admin.php(14): include() #1 {main} thrown in C:\xampp\htdocs\Project_end\connect.php on line 7