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run code in 300+ PHP versions simultaneously
<?php var_dump(array_flip(range('a', 'z')));
Output for 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 - 8.3.4, 8.3.6
array(26) { ["a"]=> int(0) ["b"]=> int(1) ["c"]=> int(2) ["d"]=> int(3) ["e"]=> int(4) ["f"]=> int(5) ["g"]=> int(6) ["h"]=> int(7) ["i"]=> int(8) ["j"]=> int(9) ["k"]=> int(10) ["l"]=> int(11) ["m"]=> int(12) ["n"]=> int(13) ["o"]=> int(14) ["p"]=> int(15) ["q"]=> int(16) ["r"]=> int(17) ["s"]=> int(18) ["t"]=> int(19) ["u"]=> int(20) ["v"]=> int(21) ["w"]=> int(22) ["x"]=> int(23) ["y"]=> int(24) ["z"]=> int(25) }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(26) { ["a"]=> int(0) ["b"]=> int(1) ["c"]=> int(2) ["d"]=> int(3) ["e"]=> int(4) ["f"]=> int(5) ["g"]=> int(6) ["h"]=> int(7) ["i"]=> int(8) ["j"]=> int(9) ["k"]=> int(10) ["l"]=> int(11) ["m"]=> int(12) ["n"]=> int(13) ["o"]=> int(14) ["p"]=> int(15) ["q"]=> int(16) ["r"]=> int(17) ["s"]=> int(18) ["t"]=> int(19) ["u"]=> int(20) ["v"]=> int(21) ["w"]=> int(22) ["x"]=> int(23) ["y"]=> int(24) ["z"]=> int(25) }

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