Using WordPress ‘rest_cookie_check_errors()’ PHP function

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The rest_cookie_check_errors() WordPress PHP function checks for errors when using cookie-based authentication.

Usage

$result = rest_cookie_check_errors($result);

Parameters

  • $result (WP_Error|mixed): Error from another authentication handler, null if we should handle it, or another value if not.

More information

See WordPress Developer Resources: rest_cookie_check_errors

Examples

In this example, we check for errors using the rest_cookie_check_errors() function.

// Check for authentication errors
$error_check = rest_cookie_check_errors(null);

// If there is an error, display it
if (is_wp_error($error_check)) {
    echo 'Error: ' . $error_check->get_error_message();
}

Custom authentication handler

This example demonstrates how to use a custom authentication handler with the rest_cookie_check_errors() function.

// Custom authentication handler
function my_custom_auth_handler($result) {
    // Your custom authentication logic here

    // Return the result
    return $result;
}

// Use the custom authentication handler with rest_cookie_check_errors
$error_check = rest_cookie_check_errors(my_custom_auth_handler(null));

// If there is an error, display it
if (is_wp_error($error_check)) {
    echo 'Error: ' . $error_check->get_error_message();
}

Multiple authentication handlers

This example shows how to use multiple authentication handlers with the rest_cookie_check_errors() function.

// Authentication handler 1
function auth_handler_1($result) {
    // Your authentication logic here

    // Return the result
    return $result;
}

// Authentication handler 2
function auth_handler_2($result) {
    // Your authentication logic here

    // Return the result
    return $result;
}

// Use both authentication handlers with rest_cookie_check_errors
$error_check = rest_cookie_check_errors(auth_handler_1(null));
$error_check = rest_cookie_check_errors(auth_handler_2($error_check));

// If there is an error, display it
if (is_wp_error($error_check)) {
    echo 'Error: ' . $error_check->get_error_message();
}

Handling authentication errors with custom error messages

This example demonstrates how to handle authentication errors and provide custom error messages using the rest_cookie_check_errors() function.

// Check for authentication errors
$error_check = rest_cookie_check_errors(null);

// If there is an error, display a custom message
if (is_wp_error($error_check)) {
    echo 'Oops! Something went wrong with authentication. Please try again.';
}

In this example, we show how to bypass the rest_cookie_check_errors() function if a specific condition is met.

// Check for authentication errors
$error_check = rest_cookie_check_errors(null);

// Bypass the error check if a specific condition is met
if (your_custom_condition()) {
    $error_check = null;
}

// If there is an error, display it
if (is_wp_error($error_check)) {
    echo 'Error: ' . $error_check->get_error_message();
}