How to debug stored procedure call failure problem using mysqli_stmt::$error?
It is not uncommon to call stored procedures when interacting with databases using PHP's mysqli extension. In this case, debugging errors can become relatively difficult because MySQL's stored procedure errors are usually not returned directly to where PHP is called. Fortunately, PHP's mysqli_stmt::$error property can help us capture error information from stored procedure calls, thus providing clues for debugging. This article will explain in detail how to use this property to debug stored procedure call failures.
mysqli_stmt::$error