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@ 2023-12-19T06:24:32Z

<?php

$array = ['4149','8397','9652','4378','3199','7999','8431','5349','7068'];

var_export(preg_grep('/(.).*\1/', $array, PREG_GREP_INVERT));

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
preg_grep: documentation ( source)

preferences:dark modelive previewkey bindings

29.39 ms | 405 KiB | 5 Q