<?php $input = $argv[1]; $start = strpos($input, '1010001'); /* Start Sentinel */ $to_parse = substr($input, $start); // strip leading zeros $byte = 0x0; $pos = 0; $end_sentinel = false; while ($pos < strlen($to_parse)) { $byte = bindec(strrev(substr($to_parse, $pos, 7))); $byte &= 0x3f; $byte += 0x20; echo chr($byte); if ($end_sentinel) { break; } if (chr($byte) == '?') { /* End Sentinel */ $end_sentinel = true; } $pos += 7; } echo "\n";