Warning: Undefined array key "codigo" in C:\xampp\htdocs\mobile\entrec.php on line 4

Warning: Undefined array key "usuario" in C:\xampp\htdocs\mobile\entrec.php on line 5

Fatal error: Uncaught PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064 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 2 in C:\xampp\htdocs\mobile\entrec.php:9 Stack trace: #0 C:\xampp\htdocs\mobile\entrec.php(9): PDO->query('update entregas...') #1 {main} thrown in C:\xampp\htdocs\mobile\entrec.php on line 9