3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(array_keys($_SERVER));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 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
array(17) { [0]=> string(4) "TERM" [1]=> string(4) "PATH" [2]=> string(4) "LANG" [3]=> string(5) "SHELL" [4]=> string(4) "MAIL" [5]=> string(7) "LOGNAME" [6]=> string(4) "USER" [7]=> string(4) "HOME" [8]=> string(8) "PHP_SELF" [9]=> string(11) "SCRIPT_NAME" [10]=> string(15) "SCRIPT_FILENAME" [11]=> string(15) "PATH_TRANSLATED" [12]=> string(13) "DOCUMENT_ROOT" [13]=> string(18) "REQUEST_TIME_FLOAT" [14]=> string(12) "REQUEST_TIME" [15]=> string(4) "argv" [16]=> string(4) "argc" }
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29
array(16) { [0]=> string(4) "TERM" [1]=> string(4) "PATH" [2]=> string(4) "LANG" [3]=> string(5) "SHELL" [4]=> string(4) "MAIL" [5]=> string(7) "LOGNAME" [6]=> string(4) "USER" [7]=> string(4) "HOME" [8]=> string(8) "PHP_SELF" [9]=> string(11) "SCRIPT_NAME" [10]=> string(15) "SCRIPT_FILENAME" [11]=> string(15) "PATH_TRANSLATED" [12]=> string(13) "DOCUMENT_ROOT" [13]=> string(12) "REQUEST_TIME" [14]=> string(4) "argv" [15]=> string(4) "argc" }
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
array(12) { [0]=> string(4) "TERM" [1]=> string(4) "PATH" [2]=> string(4) "LANG" [3]=> string(5) "SHELL" [4]=> string(4) "MAIL" [5]=> string(7) "LOGNAME" [6]=> string(4) "USER" [7]=> string(4) "HOME" [8]=> string(8) "PHP_SELF" [9]=> string(12) "REQUEST_TIME" [10]=> string(4) "argv" [11]=> string(4) "argc" }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
array(11) { [0]=> string(4) "TERM" [1]=> string(4) "PATH" [2]=> string(4) "LANG" [3]=> string(5) "SHELL" [4]=> string(4) "MAIL" [5]=> string(7) "LOGNAME" [6]=> string(4) "USER" [7]=> string(4) "HOME" [8]=> string(8) "PHP_SELF" [9]=> string(4) "argv" [10]=> string(4) "argc" }

preferences:
261.62 ms | 402 KiB | 464 Q