How Can I Handle `mysqli_query()` Errors More Securely and Effectively Than Using `or die()`?

mysqli_query() and Error Handling

When executing queries using the mysqli_query() function, the or die() syntax is commonly used to handle errors. However, this approach has several drawbacks.

Disadvantages of or die():

• Exposes system internals to potential attackers.
• Confuses users with incomprehensible error messages.
• Terminates the script abruptly, leaving users stranded.
• Kills the script without providing information on the error's location.

Alternatives to or die():

To prevent these issues, consider the following alternatives:

Exception Handling:

Configure mysqli to throw exceptions on errors by adding the following line to your connection code:

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

With this setting, you can execute queries without error checks, and any errors will be thrown as exceptions:

$result = mysqli_query($link, $sql);

Custom Error Logging Function:

In the example provided, you wanted to log errors to another table. You can create a custom function for this purpose:

function log_mysqli_error($query, $error) {
  // Perform logging logic here
}

Then, use this function within your query execution:

$update_result = mysqli_query($link, $sql_update_login) or log_mysqli_error($sql_update_login, mysqli_error($link));

By using these alternatives, you can handle mysqli errors more effectively and maintain a cleaner and safer codebase.

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