// Register the settings
function myplugin_register_settings() {
    register_setting('general', 'google_api_settings', 'myplugin_sanitize_callback');
    // Add a new section to the General Settings page
    add_settings_section(
        'google_api_settings_section',
        'Google API Settings',
        'myplugin_section_callback',
        'general'
    );
    // Add fields to the new section
    add_settings_field(
        'google_api_secret_key',
        'Secret Key',
        'myplugin_secret_key_callback',
        'general',
        'google_api_settings_section'
    );
    add_settings_field(
        'google_api_key',
        'API Key',
        'myplugin_api_key_callback',
        'general',
        'google_api_settings_section'
    );
}
// Sanitize and validate input
function myplugin_sanitize_callback($input) {
    // Sanitize the secret key and API key using sanitize_text_field
    $sanitized_input['google_api_secret_key'] = sanitize_text_field($input['google_api_secret_key']);
    $sanitized_input['google_api_key'] = sanitize_text_field($input['google_api_key']);
    // Additional validation can be added if needed
    return $sanitized_input;
}
// Section callback
function myplugin_section_callback() {
    echo '<p>Enter your Google API settings below:</p>';
}
// Secret Key field callback
function myplugin_secret_key_callback() {
    $value = get_option('google_api_settings')['google_api_secret_key'];
    echo "<input type='text' name='google_api_settings[google_api_secret_key]' value='$value' />";
}
// API Key field callback
function myplugin_api_key_callback() {
    $value = get_option('google_api_settings')['google_api_key'];
    echo "<input type='text' name='google_api_settings[google_api_key]' value='$value' />";
}
// Hook into the settings API
add_action('admin_init', 'myplugin_register_settings');