switch_locale │ action-hook │ WP 4.7.0

Fires when the locale is switched.

Usage

add_action( 'switch_locale', 'wp_kama_switch_locale_action', 10, 2 );

/**
 * Function for `switch_locale` action-hook.
 * 
 * @param string    $locale  The new locale.
 * @param false|int $user_id User ID for context if available.
 *
 * @return void
 */
function wp_kama_switch_locale_action( $locale, $user_id ){

	// action...
}

$locale(string)

The new locale.

$user_id(false|int)

User ID for context if available.

Changelog

Where the hook is called

do_action( 'switch_locale', $locale, $user_id );

Where the hook is used in WordPress