Online PHP editor | refs for mT7Of

<?php function removeLowerCharBeforeUpperChar(string $input): string { $output = ''; $length = strlen($input); for ($offset = 0; $offset < $length; ++$offset) { $nextLetter = $input[$offset + 1] ?? ''; if (ctype_lower($input[$offset]) && ctype_upper($nextLetter)) { $output .= $nextLetter; // omit current letter ++$offset; // double iterate } else { $output .= $input[$offset]; } } return $output; } echo removeLowerCharBeforeUpperChar('MickMacKusa');