<?php function check($str) { $cond1 = preg_match('#[a-z].*[a-z]#', $str); $cond2 = preg_match('#[A-Z].*[A-Z]#', $str); return $cond1 && $cond2; } $str = 'CTyZQW9c5j2ja'; var_dump(check($str));
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