3v4l.org

run code in 300+ PHP versions simultaneously
<?php $myarray=array_fill ( 0 , 2 , array_fill (0,1,3) ); foreach($myarray as $val_array) { foreach($val_array as $val) { echo $val."\n"; } }
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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
3 3
preferences:
246.54 ms | 403 KiB | 291 Q