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run code in 300+ PHP versions simultaneously
<?php $a1 = [0, 1, 2]; $a2 = [3, 4, 5]; var_export(array_merge(...array_map(null, $a1, $a2)));
Output for 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 - 8.3.7
array ( 0 => 0, 1 => 3, 2 => 1, 3 => 4, 4 => 2, 5 => 5, )
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 => 0, 1 => 3, 2 => 1, 3 => 4, 4 => 2, 5 => 5, )

preferences:
132.71 ms | 403 KiB | 157 Q