error_list

In this article, we will focus on the mysqli_error_list() function in PHP, which is used to get an array of errors that occurred during the most recent MySQLi operation. We will provide you with an overview of the function, how it works, and examples of its use.

Introduction to the mysqli_error_list() function

The mysqli_error_list() function is a built-in function in PHP that is used to get an array of errors that occurred during the most recent MySQLi operation. This function is useful when you need to handle multiple errors in your MySQLi code and take appropriate action based on the errors.

How to use the mysqli_error_list() function

Using the mysqli_error_list() function is very simple. You just need to call the function on a valid MySQLi object. Here is an example:

How to use the mysqli_error_list() function?

<?php
$mysqli = mysqli_connect("localhost", "username", "password", "database");

$query = "SELECT * FROM my_table";
$result = mysqli_query($mysqli, $query);

if (!$result) {
    $error_list = mysqli_error_list($mysqli);
    foreach ($error_list as $error) {
        echo "Failed to execute query. Error message: " . $error['error'] . "\n";
    }
    exit();
}

mysqli_close($mysqli);
?>

In this example, we connect to a MySQL database, execute a query, and check for errors. If mysqli_query() fails, mysqli_error_list() retrieves the error details. We iterate through the returned array to display each error message before exiting the script.

Advanced usage

The mysqli_error_list() function can also be used in more advanced scenarios. For example, you can use the function to get the error code and SQLSTATE error code for each error. Here is an example:

Advanced usage of PHP mysqli_error_list()

<?php
$mysqli = mysqli_connect("localhost", "username", "password", "database");

$query = "SELECT * FROM my_table";
$result = mysqli_query($mysqli, $query);

if (!$result) {
    $error_list = mysqli_error_list($mysqli);
    foreach ($error_list as $error) {
        echo "Failed to execute query. Error message: " . $error['error'] . "\n";
        echo "Error code: " . $error['errno'] . "\n";
        echo "SQLSTATE error code: " . $error['sqlstate'] . "\n";
    }
    exit();
}

mysqli_close($mysqli);
?>

This example extends the previous one by also outputting the numeric error code (errno) and the SQLSTATE code (sqlstate) for each error, providing more detailed diagnostic information.

Conclusion

In conclusion, the mysqli_error_list() function is a useful tool for handling multiple errors in your MySQLi code and taking appropriate action based on the errors. By understanding how to use the function and interpreting its returned array, you can effectively debug and handle database connection and query failures in your PHP applications.

Practice