php 清除手机中的空格和连字符，只留下“+”

Posted 2021-05-04

<?php
function kf__clean($string) {
    //$string = str_replace(' ', '', $string);
    return preg_replace('/[^A-Za-z0-9\+]/', '', $string); // Removes special chars.
}

echo kf__clean($string);


?>