<?php $start = 100; $end = 200; $step = 10; echo array_sum(range($start, $end, $step)); echo "\n---\n"; $factors = [2, 5]; $total = 0; for ($i = $start; $i <= $end; ++$i) { foreach ($factors as $f) { if ($i % $f !== 0) { continue 2; } } $total += $i; } echo $total;
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