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<?php $keys = ["first", "second", "third"]; $array = []; foreach(array_reverse($keys) as $key) { $temp = $array; unset($array[key($array)]); $array[$key] = $temp; } $array['first']['second']['third'] = 'value'; print_r($array);
Output for 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 ( [first] => Array ( [second] => Array ( [third] => value ) ) )
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 ( [first] => Array ( [second] => Array ( [third] => value ) ) )

preferences:
139.86 ms | 402 KiB | 152 Q