Should You Manually Check Errors After `mysqli_stmt_prepare`?

Evaluating Error Verification in mysqli_stmt_prepare Execution

In the realm of PHP database operations utilizing MySQLi prepared statements, a question arises regarding the efficacy of manually checking for errors when executing mysqli_stmt_prepare. This inquiry focuses specifically on the need to validate the output of the prepare statement, not the final result.

PHP Manual's Suggestion

The PHP manual recommends enclosing the mysqli_stmt_prepare statement within an if statement:

$sql = "SELECT * FROM `users`;";
$stmt = mysqli_stmt_init($db);
if (mysqli_stmt_prepare($stmt, 'SELECT * FROM `users`;')) {
    mysqli_stmt_execute($stmt);
    $result = mysqli_stmt_get_result($stmt);
}

This approach assumes manual error checking.

Automated Error Checking

However, it is important to note that MySQLi provides an automated error checking mechanism. By configuring MySQLi to report errors, developers can eliminate the need for manual validation. To enable this feature, simply execute the following code before calling mysqli_connect():

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

Once configured, MySQLi will automatically throw an exception when encountering an error, obviating the need for manual inspection of the mysqli_stmt_prepare return value.

Exception Handling

Upon encountering an error, it is imperative to handle exceptions appropriately. Comprehensive error handling practices are covered in detail in the article "PHP Error Reporting."

Conclusion

While the PHP manual suggests manual error checking, MySQLi's automated error reporting capabilities render this practice unnecessary. By configuring MySQLi to throw exceptions on errors, developers can streamline their code and ensure reliable database operations.

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