How can PHP developers effectively handle query errors when using mysqli?

When using mysqli in PHP, developers can effectively handle query errors by checking the return value of the query execution function and then accessing the error message if the query fails. This can be done by using the mysqli_error() function to retrieve the error message and handle it accordingly in the code. 

// Perform a query
$result = mysqli_query($connection, "SELECT * FROM users");

// Check for query error
if (!$result) {
    $error = mysqli_error($connection);
    // Handle the error as needed
    echo "Query error: " . $error;
} else {
    // Process the query result
    while ($row = mysqli_fetch_assoc($result)) {
        // Handle each row
    }
}

// Close the connection
mysqli_close($connection);

Keywords

PHP mysqli error handling exceptions debugging

Related Questions