Prüfung in JetEngine, ob E-Mail bereits im System existiert und zu einem User-Account gehört.php

#region Check if user e-mail is unique
function jet_fb_v_check_user_email($value, $context): bool {
	if (!is_user_logged_in()) {
		return !in_array($value, get_all_user_emails());
	}
	return get_user_data() === $value;
}
#endregion Check if user e-mail is unique

#region Get all user e-mails and return them as an array
function get_all_user_emails() {
	$emails = array(); // Initialize an empty array to hold the email addresses
	
	// Query to get all user data
	$users = get_users();
	
	// Loop through each user to fetch their email
	foreach ($users as $user) {
		$emails[] = $user->user_email;
	}
	
	return $emails; // Return the array of email addresses
}
#endregion Get all user e-mails and return them as an array

Warum nicht einfach email_exists() oder username_exists()? :)