<?php $code = "03255000000"; //$len = strlen($code); $code = substr("03255000000", 0, (strlen($code)-1)); $len = strlen($code); $i = 0; $r = 1; $sum = 0; do { $r = ($r > 10)?1:$r++; $s = ($code[$i]*$r); $sum = ($sum + $s); echo $i.": ".$code[$i]." * $r = $s sum = $sum\n"; $i++; $r++; }while($i < $len); echo (string)($sum%11); ?>
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