email_exists( string $email ): int|false

2094function email_exists( $email ) {2095	$user = get_user_by( 'email', $email );2096	if ( $user ) {2097		$user_id = $user->ID;2098	} else {2099		$user_id = false;2100	}2101 2102	/**2103	 * Filters whether the given email exists.2104	 *2105	 * @since 5.6.02106	 *2107	 * @param int|false $user_id The user ID associated with the email,2108	 *                           or false if the email does not exist.2109	 * @param string    $email   The email to check for existence.2110	 */2111	return apply_filters( 'email_exists', $user_id, $email );2112}