PHP session并发及session读写锁分析

<?php
function similarity(array $vec1, array $vec2) {
  return dotProduct($vec1, $vec2) / (absVector($vec1) * absVector($vec2));
}
 
function dotProduct(array $vec1, array $vec2) {
  $result = 0;
  foreach (array_keys($vec1) as $key1) {
    foreach (array_keys($vec2) as $key2) {
      if ($key1 === $key2) $result += $vec1[$key1] * $vec2[$key2];
    }
  }
  return $result;
}
 
function absVector(array $vec) {
  $result = 0;
  foreach (array_values($vec) as $value) {
    $result += $value * $value;
  }
  return sqrt($result);
}
 
//文章词频向量
$v1 = array('我们' => 5, '设计' => 2,  '一个' => 1, '算法' =>0, '任意' => 0, '相似' => 1);
$v2 = array('我们' => 5, '设计' => 0,  '一个' => 3, '算法' =>0, '任意' => 0, '相似' => 1);
//计算相似度，值越大相似程度越高
$result1 = similarity($v1,$v2);
var_dump($result1);

<?php
/**
*File:curl.class.php
*Createdon:2014-8-26,8:34:01
*copyright小皓(C)2013-2099版权所有
*www.haosblog.com
*
*CURL封装类，本类大部分操作均支持链式操作
*
*example：
*
*$curl=newCurl($url);
*$curl->exec();
*//发送post数据
*$curl->post(array('username'=>'用户名'))->exec();
*/

classCurl{
 private$ch;
 private$flag_if_have_run=false;
 private$has_cloase=true;

 publicfunction__construct($url='',$forgeIP=false){
 $this->init($url,$forgeIP);
 }
 
 /**
 *初始化CURL。如果CURL未被关闭，则先关闭
 *
 *@paramtype$url
 *@return＼Common＼Library＼Curl
 */
 publicfunctioninit($url='',$forgeIP=false){
 if(!$this->has_cloase){//如果上一次连接尚未结束，则先关闭
 $this->close();
 }
 
 if($forgeIP){//伪造IP，将IP伪造为访问者的IP
 if(Validate::isIPAddress($forgeIP)){
 $ip=$forgeIP;
 }else{
 $ip=$_SERVER['SERVER_ADDR'];
 }
 $this->set_ip($ip);
 }

 $this->ch=curl_init($url);
 curl_setopt($this->ch,CURLOPT_RETURNTRANSFER,1);
 $this->has_cloase=false;
 
 return$this;
 }
 
 
 publicfunctionsetUrl($url){
 curl_setopt($this->ch,CURLOPT_URL,$url);
 
 return$this;
 }

 publicfunctionclose(){
 if(!$this->has_close){
 curl_close($this->ch);
 $this->has_cloase=true;
 }
 }

 publicfunction__destruct(){
 $this->close();
 }

 /**
 *设置页面超时时间，支持链式操作
 *
 *@paramtype$timeout
 *@return＼Common＼Library＼Curl
 */
 publicfunctionset_time_out($timeout){
 curl_setopt($this->ch,CURLOPT_TIMEOUT,intval($timeout));
 return$this;
 }

 /**
 *伪造来源路径
 *
 *@paramtype$referer
 *@return＼Common＼Library＼Curl
 */
 publicfunctionset_referer($referer){
 if(!empty($referer)){
 curl_setopt($this->ch,CURLOPT_REFERER,$referer);
 }
 return$this;
 }

 /**
 *设置cookie
 *本方法仅发送cookie信息到远端，不保存远端返回的cookie信息
 *
 *@paramtype$cookie_file cookie文件的存储路径
 *@return＼Common＼Library＼Curl
 */
 publicfunctionload_cookie($cookie_file){
 $this->_checkCookie($cookie_file);
 curl_setopt($this->ch,CURLOPT_COOKIEFILE,$cookie_file);
 return$this;
 }

 /**
 *设置cookie
 *发送cookie到远端，并保存远端返回的cookie
 *
 *@paramtype$cookie_file
 *@return＼Common＼Library＼Curl
 */
 publicfunctioncookie($cookie_file){
 $this->_checkCookie($cookie_file);
 curl_setopt($this->ch,CURLOPT_COOKIEFILE,$cookie_file);
 curl_setopt($this->ch,CURLOPT_COOKIEJAR,$cookie_file);
 return$this;
 }

 /**
 *设置cookie
 *本方法将不发送cookie信息，仅接收返回的cookie并保存
 *
 *@paramtype$cookie_file
 *@return＼Common＼Library＼Curl
 */
 publicfunctionsave_cookie($cookie_file=""){
 //设置缓存文件，例如a.txt
 if(empty($cookie_file)){
 $cookie_file=tempnam('./','cookie');
 }
 $this->_checkCookie($cookie_file);
 curl_setopt($this->ch,CURLOPT_COOKIEJAR,$cookie_file);
 return$this;
 }
 
 privatefunction_checkCookie($cookie_file){
 if(!＼Think＼Storage::has($cookie_file)){
 ＼Think＼Storage::put($cookie_file,'');
 }
 }

 /**
 *执行curl请求
 *
 *@returntype
 */
 publicfunctionexec(){
 $str=curl_exec($this->ch);
 $this->flag_if_have_run=true;
 return$str;
 }

 /**
 *设置发送POST请求。没有调用过该方法默认使用GET方法提交
 *
 *@paramtype$postData post的数据，支持数组和“xxx=1&x=2”两种格式
 *@return＼Common＼Library＼Curl
 */
 publicfunctionpost($postData){
 curl_setopt($this->ch,CURLOPT_POST,1);
//echo($postQuery);die;
 curl_setopt($this->ch,CURLOPT_POSTFIELDS,$postData);
 return$this;
 }

 /**
 *获取curl的信息
 *
 *@returntype
 *@throwsException
 */
 publicfunctionget_info(){
 if($this->flag_if_have_run==true){
 returncurl_getinfo($this->ch);
 }else{
 thrownewException("<h1>需先运行(执行exec)，再获取信息</h1>");
 }
 }

 /**
 *设置代理
 *
 *@paramtype$proxy
 *@return＼Common＼Library＼Curl
 */
 publicfunctionset_proxy($proxy){
 //设置代理,例如'68.119.83.81:27977'
 curl_setopt($this->ch,CURLOPT_PROXYTYPE,CURLPROXY_SOCKS5);
 curl_setopt($this->ch,CURLOPT_PROXY,$proxy);
 return$this;
 }

 /**
 *设置请求的IP
 *
 *@paramtype$ip
 *@returntype
 */
 publicfunctionset_ip($ip=''){
 if(!empty($ip)){
 curl_setopt($this->ch,CURLOPT_HTTPHEADER,array("X-FORWARDED-FOR:$ip","CLIENT-IP:$ip"));
 }
 return$ip;
 }

}

<?php
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
if (isset($_POST) && !empty($_POST)) {
    echo "<pre>";
    var_dump($_POST);
    die;
}
?>

<!DOCTYPE html>
<html>
    <head>
        <title></title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <script src="http://filela.b0.upaiyun.com/js/jquery-1.9.0.min.js"></script>
    </head>
    <body>
        <h1>添加操作</h1>
        <form action="" method="post" >
            <iframe src="upload.php"  frameborder="no" border="0" marginwidth="0" marginheight="0" scrolling="no" allowtransparency="yes"></iframe><br/>
            名称： <input type="text" value="" name="name">
            <div id="res"> </div>
 
            <input type="submit" value="submit" />
        </form>
 
    </body>
</html>

<!DOCTYPE html>
<html>
    <head> 
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <script src="http://filela.b0.upaiyun.com/js/jquery-1.9.0.min.js"></script>
    </head>
    <body>
        <?php $img = $_GET['img']; ?>
        <?php if ($img): ?>
            <img src='http://ioutsider.oss-cn-shenzhen.aliyuncs.com/<?php echo $img; ?>' width='200' height='200' />
            <script>
                $(function(){
                    alert('上传成功');
                    window.parent.$('#res').append("<input type='hidden' value='<?php echo $img ?>' name='path'>")
                })
            </script>
        <?php endif; ?>
    </body>
</html>