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run code in 300+ PHP versions simultaneously
<?php $array = [ 'PHP', 'Arrays', 'Funções', ]; function hashtag($x){ return "#".$x; } $y = array_map(function ($x){ return "#".$x; }, $array); print_r($y);
Output for 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 ( [0] => #PHP [1] => #Arrays [2] => #Funções )
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 ( [0] => #PHP [1] => #Arrays [2] => #Funções )

preferences:
200.03 ms | 402 KiB | 216 Q