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<?php $length = 10; $letters = array( 'B','C','D','F','G','H','J','K','L','M','N','O', 'P','Q','R','S','T','V','W','X','Y','Z','1','2', '3','4','5','6','7','8','9','0' ); $index = array_fill(0, $length, 0); $key = $length - 1; $count = 10; while($count--) { $code = ""; for($i=0;$i<$length;$i++) { $code .= $letters[$index[$i]]; } echo $code ."\n"; // output code $index[$key]++; while(!isset($letters[$index[$key]])) { $index[$key] = 0; $key--; if($key < 0) { break 2; } $index[$key]++; } $key = $length - 1; }
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