3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; global $n; ++$n; echo $n; var_dump($GLOBALS);
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
1array(9) { ["_GET"]=> array(0) { } ["_POST"]=> array(0) { } ["_COOKIE"]=> array(0) { } ["_FILES"]=> array(0) { } ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) ["_SERVER"]=> array(17) { ["TERM"]=> string(5) "xterm" ["PATH"]=> string(13) "/usr/bin:/bin" ["LANG"]=> string(1) "C" ["SHELL"]=> string(7) "/bin/sh" ["MAIL"]=> string(16) "/var/mail/nobody" ["LOGNAME"]=> string(6) "nobody" ["USER"]=> string(6) "nobody" ["HOME"]=> string(4) "/tmp" ["PHP_SELF"]=> string(9) "/in/VqGN0" ["SCRIPT_NAME"]=> string(9) "/in/VqGN0" ["SCRIPT_FILENAME"]=> string(9) "/in/VqGN0" ["PATH_TRANSLATED"]=> string(9) "/in/VqGN0" ["DOCUMENT_ROOT"]=> string(0) "" ["REQUEST_TIME_FLOAT"]=> float(1442648964.0001) ["REQUEST_TIME"]=> int(1442648964) ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) } ["a"]=> int(1) ["n"]=> int(1) }
Output for 8.0.0 - 8.0.30
1array(10) { ["_GET"]=> array(0) { } ["_POST"]=> array(0) { } ["_COOKIE"]=> array(0) { } ["_FILES"]=> array(0) { } ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) ["_SERVER"]=> array(17) { ["TERM"]=> string(5) "xterm" ["PATH"]=> string(13) "/usr/bin:/bin" ["LANG"]=> string(1) "C" ["SHELL"]=> string(7) "/bin/sh" ["MAIL"]=> string(16) "/var/mail/nobody" ["LOGNAME"]=> string(6) "nobody" ["USER"]=> string(6) "nobody" ["HOME"]=> string(4) "/tmp" ["PHP_SELF"]=> string(9) "/in/VqGN0" ["SCRIPT_NAME"]=> string(9) "/in/VqGN0" ["SCRIPT_FILENAME"]=> string(9) "/in/VqGN0" ["PATH_TRANSLATED"]=> string(9) "/in/VqGN0" ["DOCUMENT_ROOT"]=> string(0) "" ["REQUEST_TIME_FLOAT"]=> float(1442648964.0001) ["REQUEST_TIME"]=> int(1442648964) ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) } ["GLOBALS"]=> *RECURSION* ["a"]=> int(1) ["n"]=> int(1) }
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
1array(10) { ["_GET"]=> array(0) { } ["_POST"]=> array(0) { } ["_COOKIE"]=> array(0) { } ["_FILES"]=> array(0) { } ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) ["_SERVER"]=> array(17) { ["TERM"]=> string(5) "xterm" ["PATH"]=> string(13) "/usr/bin:/bin" ["LANG"]=> string(1) "C" ["SHELL"]=> string(7) "/bin/sh" ["MAIL"]=> string(16) "/var/mail/nobody" ["LOGNAME"]=> string(6) "nobody" ["USER"]=> string(6) "nobody" ["HOME"]=> string(4) "/tmp" ["PHP_SELF"]=> string(9) "/in/VqGN0" ["SCRIPT_NAME"]=> string(9) "/in/VqGN0" ["SCRIPT_FILENAME"]=> string(9) "/in/VqGN0" ["PATH_TRANSLATED"]=> string(9) "/in/VqGN0" ["DOCUMENT_ROOT"]=> string(0) "" ["REQUEST_TIME_FLOAT"]=> float(1442648964.0001) ["REQUEST_TIME"]=> int(1442648964) ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) } ["GLOBALS"]=> array(10) { ["_GET"]=> array(0) { } ["_POST"]=> array(0) { } ["_COOKIE"]=> array(0) { } ["_FILES"]=> array(0) { } ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) ["_SERVER"]=> array(17) { ["TERM"]=> string(5) "xterm" ["PATH"]=> string(13) "/usr/bin:/bin" ["LANG"]=> string(1) "C" ["SHELL"]=> string(7) "/bin/sh" ["MAIL"]=> string(16) "/var/mail/nobody" ["LOGNAME"]=> string(6) "nobody" ["USER"]=> string(6) "nobody" ["HOME"]=> string(4) "/tmp" ["PHP_SELF"]=> string(9) "/in/VqGN0" ["SCRIPT_NAME"]=> string(9) "/in/VqGN0" ["SCRIPT_FILENAME"]=> string(9) "/in/VqGN0" ["PATH_TRANSLATED"]=> string(9) "/in/VqGN0" ["DOCUMENT_ROOT"]=> string(0) "" ["REQUEST_TIME_FLOAT"]=> float(1442648964.0001) ["REQUEST_TIME"]=> int(1442648964) ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) } ["GLOBALS"]=> *RECURSION* ["a"]=> int(1) ["n"]=> int(1) } ["a"]=> int(1) ["n"]=> int(1) }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
1array(10) { ["_GET"]=> array(0) { } ["_POST"]=> array(0) { } ["_COOKIE"]=> array(0) { } ["_FILES"]=> array(0) { } ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) ["_SERVER"]=> array(17) { ["TERM"]=> string(5) "xterm" ["PATH"]=> string(13) "/usr/bin:/bin" ["LANG"]=> string(1) "C" ["SHELL"]=> string(7) "/bin/sh" ["MAIL"]=> string(16) "/var/mail/nobody" ["LOGNAME"]=> string(6) "nobody" ["USER"]=> string(6) "nobody" ["HOME"]=> string(4) "/tmp" ["PHP_SELF"]=> string(9) "/in/VqGN0" ["SCRIPT_NAME"]=> string(9) "/in/VqGN0" ["SCRIPT_FILENAME"]=> string(9) "/in/VqGN0" ["PATH_TRANSLATED"]=> string(9) "/in/VqGN0" ["DOCUMENT_ROOT"]=> string(0) "" ["REQUEST_TIME_FLOAT"]=> float(1442648964.0001) ["REQUEST_TIME"]=> int(1442648964) ["argv"]=> array(1) { [0]=> string(9) "/in/VqGN0" } ["argc"]=> int(1) } ["GLOBALS"]=> *RECURSION* ["a"]=> int(1) ["n"]=> &int(1) }

preferences:
262.64 ms | 404 KiB | 377 Q