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run code in 500+ PHP versions simultaneously
<?php $fio = 'YusifovaVusaleЮзифоваВусаля'; print_r( preg_split('~(?!^)(?=\p{Lu})~u', $fio) );
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
Array ( [0] => Yusifova [1] => Vusale [2] => Юзифова [3] => Вусаля )
preferences:
132.53 ms | 1424 KiB | 4 Q