Warning: Undefined array key "id" in E:\Program_Files\wamp64\www\ivf_tracking\delete_project.php on line 3

Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1 in E:\Program_Files\wamp64\www\ivf_tracking\delete_project.php:5 Stack trace: #0 E:\Program_Files\wamp64\www\ivf_tracking\delete_project.php(5): mysqli->query('DELETE FROM pro...') #1 {main} thrown in E:\Program_Files\wamp64\www\ivf_tracking\delete_project.php on line 5