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run code in 150+ php & hhvm versions
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<?php for($i=5;$i>=1;$i--){ for($j=5;$j>=$i;$j--){ echo $j; } echo "\n"; } ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
5 54 543 5432 54321