viewHere.php

$manager = $pdo->prepare("SELECT * FROM `manager` WHERE `id_user` = :id");
	$manager->bindValue(":id", $ln->user_id, PDO::PARAM_INT);
	$manager->execute();
	$retorno['manager'] = '';
	if($manager->rowCount() > 0){
		$x = 0;
		while($rs = $manager->fetchObject()){
			$retorno['manager'] .= $rs->id_artist;
			$x++;
			if($x < $manager->rowCount()){
				$retorno['manager'] .= ',';
			}
		}
	}