Notice: Undefined index: username in C:\xampp\htdocs\Pre\Plan\Login.php on line 13

Notice: Undefined index: password in C:\xampp\htdocs\Pre\Plan\Login.php on line 14
USERNAME FIELD EMPTY
Notice: Undefined variable: con in C:\xampp\htdocs\Pre\Plan\Login.php on line 99

Warning: oci_close() expects parameter 1 to be resource, null given in C:\xampp\htdocs\Pre\Plan\Login.php on line 99