3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = array(1, 2, 3, 4, 5); $len=count($x); echo "array[$len] {"; foreach($x as $key=>$int) echo "[$key] => $int"; echo "}"; unset($x[3]); echo "\n"; $len=count($x); echo "array[$len]"; foreach($x as $key=>$int) echo "[$key] => $int"; ?>
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, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array[5] {[0] => 1[1] => 2[2] => 3[3] => 4[4] => 5} array[4][0] => 1[1] => 2[2] => 3[4] => 5

preferences:
244.71 ms | 405 KiB | 354 Q