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@ 2021-03-19T00:49:42Z

<?php

$string = 'ADJKANKNAKLNKALNFKLANFKLNAKLFNKALN';

[$first5, $string] = preg_split('~.{5}\K~', $string, 2);

var_export([$first5, $string]);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
preg_split: documentation ( source)

preferences:dark modelive previewkey bindings

30.71 ms | 405 KiB | 5 Q