class f{
    #文件名$f,数组$a,文本$s

    function  zu($arr)
    {


        foreach ($arr as $v) {
            yield $v;
        }
    }
    function curl($url)
    {
        //初始化
        $ch = curl_init();
        //设置选项，包括URL
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); // https请求 不验证证书和hosts
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

        $output = curl_exec($ch); //执行并获取HTML文档内容
        //$str = htmlspecialchars($output);//转换为源代码形式
        //释放curl句柄
        curl_close($ch);
        return  $output;
    }

    function dk($l) //打开一个链接或文件，返回字符串
    {
        if ($this->bh($l, 'http')) {

            return $this->curl($l);
        } else {

            return @file_get_contents($l);
        }
    }
    


    function bl($dir = '*_')
    { //遍历
        $dirInfo = array();
        foreach ($this->zu(glob($dir, GLOB_NOSORT)) as $v) {

            if (!is_dir($v)) {
                $dirInfo[] = $v;
            }

            if (is_dir($v)) {
                $dirInfo[] = $v;
                $dirInfo = array_merge($dirInfo, $this->bl($v . '/*'));
            }
        }

        return $dirInfo;
    }
    function sc($p)
    {

        if (is_dir($p)) {
                  foreach ($this->zu($this->bl($p)) as $v) {
                (is_dir($v)) ? rmdir($v) : unlink($v);
                   
                }
return rmdir($p);


        }
      




     

    }


function kzm($f)
    {
return pathinfo($f, PATHINFO_EXTENSION);
    }

    function wjm($f)
    {
return pathinfo($f, PATHINFO_BASENAME);
    }

  function lj($f)
    {
return  pathinfo($f, PATHINFO_DIRNAME);
    }

  function cz($f)
    {
return file_exists($f);
    }

    function  th($s,$a){
return strtr($s, $a);
    }

    function  hc($a,$zf=""){
return implode($zf, $a);
    }

    function bh($s_fu, $s_zi) //字符串包含
    {
      return stristr($s_fu, $s_zi);  
    }


    function zz($zz, $s)
    {

        preg_match_all($zz, $s, $match);
        return $match;
    }

    function fg($s, $zf=',')
    {

        return (explode($zf, $s));

    }
    function tc()
    {

if(session_destroy()){
    echo "<script> alert('退出成功！');location.href='/'; </script> ";
}
        

    }

    function tj($l, $s, $zhuijia = "0") //添加内容
    {
        if (!$this->cz(dirname($l))) {
            mkdir(dirname($l), 0777, true);
        }
        if ($zhuijia == "0") {
            return  file_put_contents($l, $s);
        }
        if ($zhuijia == "1") {
            return   file_put_contents($l, $s, FILE_APPEND);
        }

        if ($zhuijia == "2") {
            return  file_put_contents($l, $s, LOCK_EX);
        }
    }

    function kg($str)
    {
        $qian = array(" ", "　", "\t", "\n", "\r");
        return str_replace($qian, '', $str);
    }

    function ys($str)
    {
        return gzdeflate($str);
    }

    function jys($str)
    {
        return gzinflate($str);
    }



    /**
     * 截取字符串
     * $str     => 要截取的原字符串
     * $length  => 要截取的长度
     * $type    => 是否在最后加“...” 1为不加，否则为加
     *
     **/
    function jq($str, $length, $type = 1)
    {
        $len = strlen($str);
        $r = array();
        $n = 0;
        $m = 0;
        for ($i = 0; $i < $len; $i++) {
            $x = substr($str,
                $i,
                1
            );
            $a  = base_convert(ord($x), 10, 2);
            $a = substr('00000000' . $a, -8);
            if (substr($a, 0, 1) == 0) {
                $r[] = substr($str, $i,
                    1
                );
            } elseif (substr($a, 0, 3) == 110
            ) {
                $r[] = substr($str, $i,
                    2
                );
                $i += 1;
            } elseif (substr($a, 0, 4) == 1110
            ) {
                $r[] = substr($str, $i,
                    3
                );
                $i += 2;
            } else {
                $r[] = '';
            }
            if (++$m >= $length) {
                break;
            }
        }
        return join($r) . ($type != 1 ? "..." : "");
    }








}