How Do MySQLi Prepared Statements Handle and Report Errors During Preparation and Execution?

MySQLi Prepared Statements Error Reporting Revisited

When using MySQLi prepared statements, developers may wonder if the return value of the prepare statement detects errors only during statement preparation or throughout its execution. This article delves into the matter, providing insights and addressing confusion.

Detecting Errors

By default, the return value of the prepare statement indicates if errors occurred during statement preparation. To capture execution errors, developers should use the following syntax:

if ($stmt_test->execute()) {
  $errorFlag = true;
}

However, it is not necessary to check $stmt_test->errno after statement execution because any errors will be thrown as PHP Exceptions.

Configuring Error Reporting

To enable comprehensive error reporting, execute the following line in the connection code:

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

This eliminates the need to test return values for errors. Instead, developers can simply execute prepared statements:

$stmt = $mysqli->prepare("INSERT INTO testtable VALUES (?,?,?)");
$stmt->bind_param('iii', $x, $y, $z);
$stmt->execute();

When an error occurs, a PHP Exception will be thrown, allowing for error handling or reporting.

Ensuring Error Visibility

To ensure error visibility, verify that PHP error reporting is configured appropriately:

• Display errors on-screen during development.
• Log errors instead of displaying them on production servers.

By following these recommendations, developers can effectively manage errors when using MySQLi prepared statements, ensuring the smooth execution of their database operations.

The above is the detailed content of How Do MySQLi Prepared Statements Handle and Report Errors During Preparation and Execution?. For more information, please follow other related articles on the PHP Chinese website!