These are incorrect.
char server[] = "192.168.0.2/TA/user_room.php";
client.println("HOST: 192.168.0.2/TA/user_room.php");
Use these instead.
IPAddress server(192,168,0,2);
client.println("Host: 192.168.0.2");
These are incorrect.
char server[] = "192.168.0.2/TA/user_room.php";
client.println("HOST: 192.168.0.2/TA/user_room.php");
Use these instead.
IPAddress server(192,168,0,2);
client.println("Host: 192.168.0.2");