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run code in 300+ PHP versions simultaneously
<?php $array = ['1','a','b','c']; echo "$array[2]". "\n"; echo $array [4]= 'd'."\n"; echo $array[]='f'."\n"; print_r($array); ?>
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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
b d f Array ( [0] => 1 [1] => a [2] => b [3] => c [4] => d [5] => f )
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 b d f Array ( [0] => 1 [1] => a [2] => b [3] => c [4] => d [5] => f )

preferences:
172.05 ms | 402 KiB | 173 Q