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run code in 200+ php & hhvm versions
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<?php for($i=5;$i>=1;$i--){ for($j=$i;$j<=5;$j++){ echo $j; } echo "<br>"; } ?>
Output for 4.3.0 - 7.2.0
5<br>45<br>345<br>2345<br>12345<br>