Fires immediately after the given user's cache is cleaned.
$username
Sortie :
@param int $user_id User ID. @param WP_User $user User object. @param string $username The username to check for existence. @return int|false The user ID on success, false on failure.
// Utilisation de la fonction username_exists
$result = username_exists($username);
if ($result) {
// Votre logique ici
}
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