3v4l.org

run code in 300+ PHP versions simultaneously
<?php for($i=1;$i<=10;$i++) { for($l=0;$l<=$i;$l++) { echo $i; echo"\l"; } }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1\l1\l2\l2\l2\l3\l3\l3\l3\l4\l4\l4\l4\l4\l5\l5\l5\l5\l5\l5\l6\l6\l6\l6\l6\l6\l6\l7\l7\l7\l7\l7\l7\l7\l7\l8\l8\l8\l8\l8\l8\l8\l8\l8\l9\l9\l9\l9\l9\l9\l9\l9\l9\l9\l10\l10\l10\l10\l10\l10\l10\l10\l10\l10\l10\l
preferences:
311.32 ms | 406 KiB | 423 Q