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run code in 200+ php & hhvm versions
Bugs & Features
<?php $vouchers = array( 1 => 100, 3 => 150, 5 => 100 ); $specials = array( 3 => true ); $discounts = array(); $orders = [50, 100, 200, 300, 500, 1000]; foreach ($orders as $order) { foreach ($vouchers as $voucher) { $discounts[$order][$voucher] = 0; } $remainingValue = $order; $voucher = array_pop($vouchers); if ($voucher === null) { continue; } while($remainingValue > 0 && $voucher !== null) { $value = min ($remainingValue, $voucher); $discounts[$order][$voucher] = $value; $vaucher = array_pop($vouchers); } } var_dump($discounts);
based on vMDfp
Output for 5.4.1 - 7.2.0

Process exited with code 137.
Output for 5.3.11 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/9EKZM on line 14
Process exited with code 255.