3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array("Alice", "Mary", "George", "Dave"); $r = array_reverse($arr); var_dump($r); list($a,$a) = $r; var_dump($a); // Alice or Mary?
Output for 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 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(4) { [0]=> string(4) "Dave" [1]=> string(6) "George" [2]=> string(4) "Mary" [3]=> string(5) "Alice" } string(6) "George"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 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 - 5.6.40
array(4) { [0]=> string(4) "Dave" [1]=> string(6) "George" [2]=> string(4) "Mary" [3]=> string(5) "Alice" } string(4) "Dave"
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/UFhsU on line 6
Process exited with code 255.

preferences:
311.51 ms | 401 KiB | 455 Q