php中session放cookie优缺点分析

    $logo = 'logo.png';

    if(is_file($logo))
    {
        $QR = imagecreatefromstring(file_get_contents($filename));
        $logo = imagecreatefromstring(file_get_contents($logo));
        $QR_width = imagesx($QR);
        $QR_height = imagesy($QR);
        $logo_width = imagesx($logo);
        $logo_height = imagesy($logo);
        $logo_qr_width = $QR_width / 5;
        $scale = $logo_width / $logo_qr_width;
        $logo_qr_height = $logo_height / $scale;
        $from_width = ($QR_width - $logo_qr_width) / 2;
        imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
        imagepng($QR,$filename);
    }

    <?php
    /**
    * @author: vfhky 20130304 20:10
    * @description: PHP调用新浪短网址API接口
    *    * @param string $type: 非零整数代表长网址转短网址,0表示短网址转长网址
    */
    function xlUrlAPI($type,$url){
    /* 这是我申请的APPKEY，大家可以测试使用 */
    $key = '1562966081';
    if($type)
    $baseurl = 'http://api.t.sina.com.cn/short_url/shorten.json?source='.$key.'&url_long='.$url;
    else
    $baseurl = 'http://api.t.sina.com.cn/short_url/expand.json?source='.$key.'&url_short='.$url;
    $ch=curl_init();
    curl_setopt($ch, CURLOPT_URL,$baseurl);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_TIMEOUT, 15);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
    $strRes=curl_exec($ch);
    curl_close($ch);
    $arrResponse=json_decode($strRes,true);
    if (isset($arrResponse->error) || !isset($arrResponse[0]['url_long']) || $arrResponse[0]['url_long'] == '')
    return 0;
    if($type)
    return $arrResponse[0]['url_short'];
    else
    return $arrResponse[0]['url_long'];
    }
    echo '<br/><br/>----------新浪短网址API----------<br/><br/>';
    echo 'Long to Short: '.xlUrlAPI(1,'http://www.111cn.net').'<br/>';
    echo 'Short to Long: '.xlUrlAPI(0,'http://t.cn/8FdW1rm').'<br/><br/>';
    ?>

abstract class Task extends Thread {
 private $finished;
 public $terminated;
 protected $id;
 public $terminate;
 public function __construct($id) {
  $this->id = $id;
  $this->terminated = true;
  $this->finished = false;
  $this->terminate = false;
 }
}

abstract class Task extends Thread {
 private $finished=false;
 public $terminated=false;
 protected $id;// www.111cn.net
 public $terminate=false;
 public function __construct($id) {
  $this->id = $id;
 }
}

function cut_str($string, $sublen, $start = 0, $code = 'UTF-8')
{
    if($code == 'UTF-8')
    {
        $pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/";
        preg_match_all($pa, $string, $t_string);

        if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen));
        return join('', array_slice($t_string[0], $start, $sublen));
    }
    else
    {
        $start = $start*2;
        $sublen = $sublen*2;
        $strlen = strlen($string);
        $tmpstr = '';www.111cn.Net

        for($i=0; $i< $strlen; $i++)
        {
            if($i>=$start && $i< ($start+$sublen))
            {
                if(ord(substr($string, $i, 1))>129)
                {
                    $tmpstr.= substr($string, $i, 2);
                }
                else
                {
                    $tmpstr.= substr($string, $i, 1);
                }
            }
            if(ord(substr($string, $i, 1))>129) $i++;
        }
        //if(strlen($tmpstr)< $strlen ) $tmpstr.= "...";
        return $tmpstr;
    }
}

$str = "如来神掌";
echo cut_str($str, 1, 0).'**'.cut_str($str, 1, -1);
//输出：如**掌

<?php 

$ip =$_SERVER['REMOTE_ADDR'];

  $ip_arr= explode('.', $ip);

  $ip_arr[3]='*';

  $ip= implode('.', $ip_arr);

echo $ip;

?>

<?php
$haoma="15012345678";
echo preg_replace("/(d{3})d{5}/","$1*****",$haoma);
//150*****678
?>