Should We Manually Check for `mysqli_connect()` Errors, or Are Exceptions a Better Approach?

Should We Manually Check for mysqli_connect() Errors?

The PHP manual for mysqli_connect() suggests checking for the return value and displaying error messages manually. However, some argue against this practice, citing the following reasons:

Manual Error Checking Doesn't Provide More Information

The error message displayed manually contains the same information as the automatic warning generated by MySQLi. Moreover, the manual "debugging" may provide even less information.

Security Concerns

Manually displaying error messages reveals sensitive information like database username and password to end users, which is a security concern. It is recommended to log errors on the server instead.

Exceptions Are Preferable for Debugging

Instead of manually checking for errors, using exceptions is a more efficient way of handling connection failures. mysqli_report() can be used to configure MySQLi to throw exceptions automatically, which can stop script execution and provide more useful error information.

mysqli_error() Cannot Display Connection Errors

Unlike mysqli_connect_error() or the automatic warning, mysqli_error() cannot show any connection-related problems. It requires a valid mysqli connection and will generate an error if one does not exist.

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