PHP 删除字符串里面所有的空格

    /** 删除所有的空格
     * @param $str <p>要去除空格的字符串</p>
     * @return array|string|string[]
     */
    public function removespaces($str)
    {
        $qian = array(" ", "　", "\t", "\n", "\r");
        $hou = array("", "", "", "", "");
        return str_replace($qian, $hou, $str);
    }