<?php $string = '1234567890'; echo preg_replace('/\d{3}\K/', '-', $string, 2); echo "\n---\n"; vprintf('%s-%s-%s', sscanf($string, '%3s%3s%4s')); echo "\n---\n"; echo implode('-', sscanf($string, '%3s%3s%4s'));
You have javascript disabled. You will not be able to edit any code.