3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [0 => 0, 1 => 0, 2 => 8, 3 => 0, 4 => 0, 5 => 0, 6 => 0, 7 => 0, 8 => 10, 10 => 0, 11 => 0, 12 => 0, 14 => 0, 15 => 0]; $keys = array_keys($a); print_r(array_replace(array_fill(min($keys), max($keys) - min($keys), 999), $a));

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13.99 ms | 409 KiB | 5 Q