3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( preg_split( '//u', "A\xef\xbf\xbdB" ) );
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(5) { [0]=> string(0) "" [1]=> string(1) "A" [2]=> string(3) "�" [3]=> string(1) "B" [4]=> string(0) "" }
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9
array(3) { [0]=> string(0) "" [1]=> string(1) "A" [2]=> string(4) "�B" }
Output for 4.3.0 - 4.3.4
array(7) { [0]=> string(0) "" [1]=> string(1) "A" [2]=> string(1) "�" [3]=> string(1) "�" [4]=> string(1) "�" [5]=> string(1) "B" [6]=> string(0) "" }

preferences:
242.87 ms | 401 KiB | 342 Q