<?php $command = 1; $chksum = 2; $session_id = 3; $reply_id = 4; $command_string = 'test'; $buf = pack('SSSS', $command, $chksum, $session_id, $reply_id).$command_string; $buf = unpack('C'.(8+strlen($command_string)).'c', $buf); var_dump($buf);
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