What is the purpose of the mysqli_error() function in PHP?

The mysqli_error() function in PHP is used to retrieve the error description for the most recent MySQLi function call. This can be helpful for debugging purposes when there is an issue with a MySQLi query or connection. By using mysqli_error(), developers can quickly identify and troubleshoot any errors that occur during database operations. 

// Example of using mysqli_error() to handle errors in a MySQLi query
$conn = mysqli_connect("localhost", "username", "password", "database");

if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

$sql = "SELECT * FROM users";
$result = mysqli_query($conn, $sql);

if (!$result) {
    echo "Error: " . mysqli_error($conn);
}

// Further code to process the query result

Keywords

mysqli_error PHP function error handling MySQL

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