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当我从特定的 access_token 获取所有信息时,数组元素之一是:
[app_id] => ****** [is_valid] => 1 [profile_id] => ******* [application] => ***** [user_id] => ****** [issued_at] => 1375454193 [expires_at] => 0 [scopes] => Array
假设有这个-> [expires_at] => 0?