<?php $string = 'abclkjabc'; $notRepeated = []; foreach (count_chars($string, 1) as $char => $count) { if ($count === 1) { $notRepeated[] = chr($char); } } var_export($notRepeated); echo "\nCount = " . count($notRepeated);
You have javascript disabled. You will not be able to edit any code.