📅  最后修改于: 2022-03-11 14:53:40.780000             🧑  作者: Mango
$users = [
'user1' => 'user1@example.com',
'user2' => 'user2@example.com'
];
echo implode(', ',$users);
// "user1@example.com, user2@example.com"