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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.29 - 7.2.33, 7.3.16 - 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:
240.22 ms | 406 KiB | 309 Q