3v4l.org

run code in 300+ PHP versions simultaneously
<?php $code = "03255000000"; $len = strlen($code); $i = 0; $sum = 0; do { $r = $i+1; $sum += $code[$i]*$r; echo "$r:$sum<br>"; $i++; }while($i < $len); echo (string)($sum%11); ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.32, 7.1.0 - 7.1.24, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1:0<br>2:6<br>3:12<br>4:32<br>5:57<br>6:57<br>7:57<br>8:57<br>9:57<br>10:57<br>11:57<br>2
preferences:
298.56 ms | 406 KiB | 420 Q