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<?php $signed_string = 'a:4:{s:28:"Tzo4OiJzdGRDbGFzcyI6MDp7fQ==";s:1:"1";s:9:"adminhash";N;s:4:"ajax";N;s:8:"postvars";N;}'; var_dump($signed_string, base64_decode($signed_string), unserialize(base64_decode($signed_string)));

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