php文件缓存实例代码

php教程文件缓存实例代码
缓存在实际使用当中应用很广泛，可以减轻对服务器数据库教程的访问，提高运行速度。目前很多cms内容管理系统中频繁使用缓存机制来提高系统运行的效率
cache.php 代码如下：
php代码
<? 
/*
用户需要事先定义的常量：
_cachepath_        模板缓存路径
_cacheenable_        自动缓存机制是否开启，未定义或为空，表示关闭自动缓存机制
_recachetime_        自动重新缓存间隔时间，单位为秒，未定义或为空，表示关闭自动重新缓存
*/ 
 
class cache { 
 
var $cachefile; 
var $cachefilevar; 
 
function cache() { 
        //生成当前页的cache组文件名 $this->cachefilevar 及文件名 $this->cachefile 
        //动态页的参数不同对应的cache文件也不同，但是每一个动态页的所有cache文件都有相同的文件名，只是扩展名不同 
        $s=array(".","/");$r=array("_",""); 
        $this->cachefilevar=str_replace($s,$r,$_server["script_name"])."_".$_get[_actionvar_]; 
        $this->cachefile=$this->cachefilevar.".".md5($_server["request_uri"]); 
} 
 
//删除当前页/模块的缓存 
function delete() { 
        //删除当前页的缓存 
        $d = dir(_cachepath_); 
        $strlen=strlen($this->cachefilevar); 
        //返回当前页的所有cache文件组 
        while (false !== ($entry = $d->read())) { 
                    if (substr($entry,0,$strlen)==$this->cachefilevar) { 
                            if (!unlink(_cachepath_."/".$entry)) {echo "cache目录无法写入";exit;} 
                    } 
            } 
} 
 
//判断是否已cache过，以及是否需要cache 
function check() { 
        //如果设置了缓存更新间隔时间 _recachetime_ 
        if (_recachetime_+0>0)        { 
                //返回当前页cache的最后更新时间 
                $var=@file(_cachepath_."/".$this->cachefilevar);$var=$var[0]; 
                //如果更新时间超出更新间隔时间则删除cache文件 
                if (time()-$var>_recachetime_) { 
                        $this->delete();$ischage=true; 
                } 
        } 
        //返回当前页的cache 
        $file=_cachepath_."/".$this->cachefile; 
        //判断当前页cache是否存在 且 cache功能是否开启 
        return (file_exists($file) and _cacheenable_ and !$ischange); 
} 
 
//读取cache 
function read() { 
        //返回当前页的cache 
        $file=_cachepath_."/".$this->cachefile; 
        //读取cache文件的内容 
        if (_cacheenable_) return readfile($file); 
        else return false; 
} 
 
//生成cache 
function write($output) { 
        //返回当前页的cache 
        $file=_cachepath_."/".$this->cachefile; 
        //如果cache功能开启 
        if (_cacheenable_) { 
                //把输出的内容写入cache文件 
                fopen($file,'w'">$fp=@fopen($file,'w'); 
                if (!@fputs($fp,$output)) {echo "模板cache写入失败";exit;} 
                @fclose($fp); 
                //如果设置了缓存更新间隔时间 _recachetime_ 
                if (_recachetime_+0>0) { 
                        //更新当前页cache的最后更新时间 
                        $file=_cachepath_."/".$this->cachefilevar; 
                        $fp=@fopen($file,'w'); 
                        if (!@fwrite($fp,time())) {echo "cache目录无法写入";exit;} 
                        @fclose($fp); 
                } 
        } 
} 
 
} 
?> 
使用过程：
php代码
<?php 
        define("_cachepath_","./cache/"); 
        define("_cacheenable_","1"); 
        define("_recachetime_","43200"); 
        include('cache.php'); 
        $cache=new cache(); 
        if ($cache->check()) { 
        $template=$cache->read(); 
                }else { 
                ob_start(); 
                ob_implicit_flush(0); 
        ?> 
                                  页面内容。。。。 
<?php 
        $template = ob_get_contents(); 
        $cache->write($template); 
        } 
        ?> 

类名 :httprequest($url="",$method="get",$usesocket=0)
//$url为请求的地址；默认请求方法为get；$usesocket默认为0，使用fsockopen方法，如果设置为1则使用socket_create方法

方法：
open($ip="",$port=-1) //打开同服务器的连接，默认不用设置这两个参数（一个同事在linux用的时候，请求的不是hostname解析的ip，因此加了这两个参数，以连接真实的服务器ip）
settimeout($timeout=0) //设置获取数据的超时时间，必须在send方法调用之前设置才有效,单位秒，默认值0为不限制
setrequestheader($key,$value="") //设置请求头，必须在send方法调用之前设置才有效
removerequestheader($key,$value="") //移除指定键值的请求头，必须在send方法调用之前调用才有效
send($data="") //发送数据$data到服务器
getresponsebody() //获取服务器返回的文本
getallresponseheaders() //获取服务器响应的所有头信息
getresponseheader($key) //获取服务器响应的某个头信息，例如server,set_cookie等

属性：
$url //要请求的url
$method //请求方法(post/get)
$port //请求的端口
$hostname //请求的主机名
$uri //url的文件部分
$protocol //请求协议(http)(包括本属性的以上5个属性均由程序自动通过url分析)
$excption //异常信息
$_headers=array() //请求头array("key"=>"value")
$_senddata //发送到服务器的数据
$status //返回的状态码
$statustext //状态信息
$httpprotocolversion //服务器的http协议版本

注意：
host头由程序自动设置，当用post方法请求时，content-length和content-type已被自动设置。
支持gzip压缩的页面

inc.http.php教程文件

<?php

class httprequest{
 public $url,$method,$port,$hostname,$uri,$protocol,$excption,$_headers=array(),$_senddata,$status,$statustext,$httpprotocolversion;
 private $fp=0,$_buffer="",$responsebody,$responseheader,$timeout=0,$usesocket;
 //构造函数
 function __construct($url="",$method="get",$usesocket=0){
  $this->url = $url;
  $this->method = strtoupper($method);
  $this->usesocket = $usesocket;
  $this->setrequestheader("accept","*/*");
  $this->setrequestheader("accept-language","zh-cn");
  $this->setrequestheader("accept-encoding","gzip, deflate");
  $this->setrequestheader("user-agent","httprequest class 1.0");  //可调用setrequestheader来修改
 }
 
 //连接服务器
 public function open($ip="",$port=-1){
  if(!$this->_geturlinfo()) return false;
  $this->setrequestheader("host",$this->hostname);
  $this->setrequestheader("connection","close");
  $ip = ($ip=="" ? $this->hostname : $ip);
  $port = ($port==-1 ? $this->port : $port);
  if($this->usesocket==1){
   if(!$this->fp=$socket=socket_create(af_inet,sock_stream,0)) {
    $this->excption="can not create socket";return false;
   }else{
    if(!socket_connect($this->fp,$ip, $port) ){
     $this->excption="can not connect to server " . $this->hostname . " on port" . $this->port;return false;
    }
   }
  }else{
   if(!$this->fp=fsockopen($ip, $port,$errno,$errstr,10)) {
    $this->excption="can not connect to server " . $this->hostname . " on port" . $this->port;return false;
   }
  }
  return true;
 }
 
 public function send($data=""){
  if(!$this->fp){$this->excption="is not a resource id";return false;}
  if($this->method=="get" && $data!=""){
   $s_str="?";
   if(strpos($this->uri,"?")>0) $s_str = "&";
   $this->uri.= $s_str . $data;
   $data="";
  }
  $senddata=$this->method . " " . $this->uri . " http/1.1rn";
  if($this->method=="post"){
   $this->setrequestheader("content-length",strlen($data));
   $this->setrequestheader("content-type", "application/x-www-form-urlencoded");
  }
  foreach($this->_headers as $keys => $value){
   $senddata .= "$keys: $valuern";
  }
  $senddata .= "rn";
  if($this->method=="post") $senddata .= $data;
  $this->_senddata = $senddata;
  if($this->usesocket==1){
   socket_write($this->fp,$this->_senddata);
   $buffer="";
   $timestart = time();
   do{
    if($this->timeout>0){
     if(time()-$timestart>$this->timeout){break;}
    }
    $this->_buffer.=$buffer;
    $buffer = socket_read($this->fp,4096);
   }while($buffer!="");
   socket_close($this->fp); 
  }else{
   fputs($this->fp, $senddata);
   $this->_buffer="";
   $timestart = time();
   while(!feof($this->fp))
   {
    if($this->timeout>0){
     if(time()-$timestart>$this->timeout){break;}
    }
    $this->_buffer.=fgets($this->fp,4096);
   }
   fclose($this->fp);   
  }
  $this->_splitcontent();
  $this->_getheaderinfo();
 }
 
 public function getresponsebody(){
  if($this->getresponseheader("content-encoding")=="gzip" && $this->getresponseheader("transfer-encoding")=="chunked"){
   return gzdecode_1(transfer_encoding_chunked_decode($this->responsebody));
  }else if($this->getresponseheader("content-encoding")=="gzip"){
   return gzdecode_1($this->responsebody);
  }else{
   return $this->responsebody;
  }
 }
 
 public function getallresponseheaders(){
  return  $this->responseheader;
 }
 
 public function getresponseheader($key){
  $key = str_replace("-","-",$key);
  $headerstr = $this->responseheader . "rn";
  $count = preg_match_all("/n$key:(.+?)r/is",$headerstr,$result,preg_set_order);
  if($count>0){
   $returnstr="";
   foreach($result as $key1=>$value){
    if(strtoupper($key)=="set-cookie"){
     $value[1] = substr($value[1],0,strpos($value[1],";"));
    }
    $returnstr .= ltrim($value[1]) . "; ";
   }
   $returnstr = substr($returnstr,0,strlen($returnstr)-2);
   return $returnstr;
  }else{return "";}
 }
 
 public function settimeout($timeout=0){
  $this->timeout = $timeout; 
 }
 
 public function setrequestheader($key,$value=""){
  $this->_headers[$key]=$value;
 }
 
 public function removerequestheader($key){
  if(count($this->_headers)==0){return;}
  $_temp=array();
  foreach($this->_headers as $keys => $value){
   if($keys!=$key){
    $_temp[$keys]=$value;
   }
  }
  $this->_headers = $_temp;
 }
 
 //拆分url
 private function _geturlinfo(){
  $url = $this->url;
  $count = preg_match("/^http://([^:/]+?)(:(d+))?/(.+?)$/is",$url,$result);
  if($count>0){
   $this->uri="/" . $result[4];
  }else{
   $count = preg_match("/^http://([^:/]+?)(:(d+))?(/)?$/is",$url,$result);
   if($count>0){
    $this->uri="/";
   }
  }
  if($count>0){
   $this->protocol="http";
   $this->hostname=$result[1];
   if(isset($result[2]) && $result[2]!="") {$this->port=intval($result[3]);}else{$this->port=80;}
   return true;
  }else{$this->excption="url format error";return false;}
 }
 
 private function _splitcontent(){
  $this->responseheader="";
  $this->responsebody="";
  $p1 = strpos($this->_buffer,"rnrn");
  if($p1>0){
   $this->responseheader = substr($this->_buffer,0,$p1);
   if($p1+4<strlen($this->_buffer)){
    $this->responsebody = substr($this->_buffer,$p1+4);
   }
  }
 }
 
 private function _getheaderinfo(){
  $headerstr = $this->responseheader;
  $count = preg_match("/^http/(.+?)s(d+)s(.+?)rn/is",$headerstr,$result);
  if($count>0){
   $this->httpprotocolversion = $result[1];
   $this->status = intval($result[2]);
   $this->statustext = $result[3];
  }
 }
}

//以下两函数参考网络
function gzdecode_1 ($data) {
 $data = ($data);
 if (!function_exists ( 'gzdecode' )) {
  $flags = ord ( substr ( $data, 3, 1 ) );
  $headerlen = 10;
  $extralen = 0;
  $filenamelen = 0;
  if ($flags & 4) {
   $extralen = unpack ( 'v', substr ( $data, 10, 2 ) );
   $extralen = $extralen [1];
   $headerlen += 2 + $extralen;
  }
  if ($flags & 8) // filename
   $headerlen = strpos ( $data, chr ( 0 ), $headerlen ) + 1;
  if ($flags & 16) // comment
   $headerlen = strpos ( $data, chr ( 0 ), $headerlen ) + 1;
  if ($flags & 2) // crc at end of file
   $headerlen += 2;
  $unpacked = @gzinflate ( substr ( $data, $headerlen ) );
  if ($unpacked === false)
   $unpacked = $data;
  return $unpacked;
 }else{
  return gzdecode($data);
 }
}

function transfer_encoding_chunked_decode($in) {
 $out = "";
 while ( $in !="") {
  $lf_pos = strpos ( $in, "12" );
  if ($lf_pos === false) {
   $out .= $in;
   break;
  }
  $chunk_hex = trim ( substr ( $in, 0, $lf_pos ) );
  $sc_pos = strpos ( $chunk_hex, ';' );
  if ($sc_pos !== false)
   $chunk_hex = substr ( $chunk_hex, 0, $sc_pos );
  if ($chunk_hex =="") {
   $out .= substr ( $in, 0, $lf_pos );
   $in = substr ( $in, $lf_pos + 1 );
   continue;
  }
  $chunk_len = hexdec ( $chunk_hex );
  if ($chunk_len) {
   $out .= substr ( $in, $lf_pos + 1, $chunk_len );
   $in = substr ( $in, $lf_pos + 2 + $chunk_len );
  } else {
   $in = "";
  }
 }
 return $out;
}
function utf8togb($str){
 return iconv("utf-8","gbk",$str);
}

function gbtoutf8($str){
 return iconv("gbk","utf-8",$str);
}
?>

response.asp教程文件

<%
response.cookies("a") = "anlige"
response.cookies("a").expires = dateadd("yyyy",1,now())
response.cookies("b")("c") = "wsdasdadsa"
response.cookies("b")("d") = "ddd"
response.cookies("b").expires = dateadd("yyyy",1,now())
response.write "querystring : " & request.querystring & "<br />"
for each v in request.querystring
 response.write v & "=" & request.querystring(v) & "<br />"
next
response.write "<br />form : " &  request.form  & "<br />"
for each v in request.form
 response.write v & "=" & request.form(v) & "<br />"
next
response.write "<br />url : " &  request.servervariables("url")  & "<br />"
response.write "referer : " &  request.servervariables("http_referer")  & "<br />"
response.write "host : " &  request.servervariables("http_host")  & "<br />"
response.write "user-agent : " &  request.servervariables("http_user_agent")  & "<br />"
response.write "cookie" & request.servervariables("http_cookie")
%>

index.php文件

<a href="?action=get">get传数据</a>
<a href="?action=post">post传数据</a>
<a href="?action=header_referer">向服务器发送来路信息</a>
<a href="?action=header_useragent">向服务器发送user-agent</a>
<a href="?action=status">获取服务器返回的状态</a>
<a href="?action=get_headers">获取服务器响应头</a>
<a href="?action=get_image">保存图片</a><br /><br /><br />
<?php
include("inc_http.php");
$responseurl = "http://dev.mo.cn/aiencode/http/response.asp";

$act = isset($_get["action"]) ? $_get["action"] : "";
if($act == "get"){  //get传数据

 $myhttp = new httprequest("$responseurl?a=text");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody()); 
 
}else if($act == "post"){ //post传数据

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody());
 
}else if($act == "header_referer"){  //向服务器发送来路信息

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->setrequestheader("referer","http://www.baidu.com");
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody()); 
 
}else if($act == "header_useragent"){  //向服务器发送user-agent

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->setrequestheader("referer","http://www.baidu.com");
 $myhttp->setrequestheader("user-agent","mozilla/4.0 (compatible; msie 7.0; windows nt 6.0; trident/4.0)");
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody()); 
 
}else if($act == "status"){   //获取服务器返回的状态

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->status . " " . $myhttp->statustext ."<br /><br />"); 
 echo($myhttp->getresponsebody());
 
}else if($act == "get_headers"){  //获取服务器响应头

 $myhttp = new httprequest("$responseurl?a=text","get");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getallresponseheaders()."<br /><br />");  
 echo($myhttp->getresponseheader("server")."<br /><br />"); 
 
}else if($act == "get_image"){
 
 $myhttp = new httprequest("http://www.baidu.com/img/baidu_logo.gif");
 $myhttp->open();
 $myhttp->send(); 
 $fp = @fopen("demo.gif","w");
 fwrite($fp,$myhttp->getresponsebody());
 fclose($fp);
 echo("<img src="demo.gif" />");
}

?>

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>关键字百度排名批量查</title>
<base target="_blank" />
<meta http-equiv="x-ua-compatible" content="ie=emulateie7" />
<style type="text/css教程">
body{margin:0;padding:0;background:#fff;color:#000;font:12px 微软雅黑, verdana, tahoma, lucida grande, arial, sans-serif;text-align:center;}
#wrapper{width:990px;margin:0 auto;line-height:20px;text-align:left;}
#header,#main,#footer{clear:both;float:left;margin:10px 0 0 0;width:100%;}
a,a:visited{color:#0196e3;text-decoration:none;}
form{margin:10px;}
.kinput{width:300px;margin:0 5px;padding:2px;text-align:left;border:1px solid #ccc;font-weight:bold;}
.kbutton{width:80px;margin:0 5px;padding:2px;height:20px;}
#kgrid{float:left;width:100%;}
.s_kw,.s_rank,.s_wt,.s_title,.s_cache,.s_feng,.s_baidu,.s_mu{float:left;height:30px;line-height:30px;overflow:hidden;text-align:left;border:1px solid #c2d5e3;}
.s_bar{clear:both;float:left;width:100%;height:30px;line-height:30px;text-align:center;}
.s_kw{clear:both;width:120px;}
.s_rank{width:30px;}
.s_wt{width:50px;color:#0e774a;}
.s_title{width:340px;}
.s_cache{width:80px;}
.s_feng{width:80px;}
.s_baidu{width:150px;}
.s_mu{width:120px;}
</style>
</head>

<body>
<div id="wrapper">
<?php教程
function tongji()
{
 $myhost = $_server['http_host'];
 if (preg_match("/(www.)?baiek.com/i", $myhost, $myout))
 {
  echo '<script language="网页特效" type="text/javascript" src="http://js.users.51.la/4295418.js"></script>';
 }
}

function libxml_display_error($error)
{
 $return = "<br/>n";
 switch ($error->level)
 {
  case libxml_err_warning:
   $return .= "<b>warning $error->code</b>: ";
   break;
  case libxml_err_error:
   $return .= "<b>error $error->code</b>: ";
   break;
  case libxml_err_fatal:
   $return .= "<b>fatal error $error->code</b>: ";
   break;
 }
 $return .= trim($error->message);
 if ($error->file)
 {
  $return .= " in <b>$error->file</b>";
 }
 $return .= " on line <b>$error->line</b>n";
 return $return;
}

function libxml_display_errors()
{
 $errors = libxml_get_errors();
 foreach ($errors as $error)
 {
  print libxml_display_error($error);
 }
 libxml_clear_errors();
}

$kfname = '';
if (isset($_get['kf']))
{
 $kfname = trim($_get['kf']);
}
$version = '<script language="javascript" type="text/javascript" src="http://www.111cn.net/version.js"></script>';
echo <<< eoth
<div id="header">
 做企业站或认识企业站的朋友，请支持一下我的小站 <a href="http://www.198114.com/"><b>198114产品企业分类目录</b></a>，多谢多谢！！
 <a href="http://www.111cn.net/" target="_self"><h1>关键字百度排名批量查询（php网页版） baiek.com</h1></a>
 <form method="get" target="_self">
  <input id="kf" name="kf" type="text" class="kinput" value="{$kfname}" />
  <input id="submitbtn" type="submit" class="kbutton" value="批量查询" />
  &emsp;<a href="http://www.111cn.net/baiek.rar" target="_self"><b>点击此处下载（更新于{$version}）</b></a>
  &emsp;在线演示：<a href="http://www.111cn.net/?kf=kw1.xml" target="_self">演示1</a>&emsp;<a href="http://www.111cn.net/?kf=kw2.xml" target="_self">演示2</a>&emsp;<a href="http://www.111cn.net/?kf=kw3.xml" target="_self">演示3</a>
 </form>
</div>

eoth;
if (!file_exists($kfname) || !is_readable($kfname))
{
 tongji();
 exit('请输入正确的关键字清单文件（xml格式，请参考<a href="http://www.111cn.net/readme.txt">readme</a>文件）！！');
}
libxml_use_internal_errors(true);
$doc = new domdocument();
$doc->load($kfname);
if (!$doc->schemavalidate('kw.xsd'))
{
 print '<b>关键字列表xml文件发现错误！</b>';
 libxml_display_errors();
 tongji();
 exit;
}

//由xml文件提取关键字列表与相应的域名
$kwlist = array(); $g = 1;
$kgroups教程 = $doc->getelementsbytagname("kgroup");
foreach ($kgroups as $kgroup)
{
 $kwlist[$g]['domain'] = trim($kgroup->getelementsbytagname("kdomain")->item(0)->nodevalue);
 $kwords = $kgroup->getelementsbytagname("kword");
 $w = 1;
 foreach ($kwords as $kword)
 {
  if ($kword->haschildnodes())
  {
   $kwlist[$g]['kword'][$w] = trim($kword->firstchild->nodevalue);
  }
  $w++;
 }
 $g++;
}
?>
<div id="main">
<?php
function get_dm_weight($h, $i)
{
 //$h表示搜索结果的url，$i表示结果排名
 $p = ceil($i / 10);  //搜索结果第几页
 
 $i_weight = array(1 => 52, 2 => 15, 3 => 10, 4 => 5, 5 => 5, 6 => 4, 7 => 1, 8 => 3, 9 => 2, 0 => 3);
 $h_str = preg_replace("/^.*?://(.*?)(#.*)?$/i", "$1$3", $h); //去除url中的协议（例如http）与#信息片段部分
 $h_arr = explode("?", $h_str, 2);
 $h0_arr = explode("/", $h_arr[0]);
 if ($h0_arr[count($h0_arr) - 1] == '')
 {
  $level_l = count($h0_arr) - 1;
 }
 else
 {
  $level_l = count($h0_arr);
 }
 if (isset($h_arr[1]))
 {
  if ($h_arr[1] != '')
  {
   $level_r = count(explode("&", $h_arr[1]));
  }
  else
  {
   $level_r = 0;
  }
 }
 else
 {
  $level_r = 0;
 }
 $dw = $i_weight[$i % 10] * pow(0.5, ($level_l + $level_r - 1)) * 9 / pow(10, $p);
 return number_format($dw, 1);;
}

function fetch_baidu($d, $k)
{
 $urlw = urlencode(iconv("utf-8","gbk//ignore",$k));
 $max_srh_page = 2; //百度搜索结果50条/页，提取2页，也就是只在前100条搜索结果中检查排名，最大值可以设为16
 $baidu_ids = array(); //存储百度系列子站点占据的排名位置
 $baidu_mus = array(); //存储百度开放平台等优质站点占据的排名位置
 $isrank = 0; //$isrank = 1 当前域名下这个关键词获得排名; $isrank = 0 当前域名下这个关键词没有排名
 $all_count = 0; //测试变量，以确认匹配规则不会遗漏任何一条搜索结果
 $dm_weight = 0; //分析搜索结果页面中顶级、次级、目录、内页的情况，粗略反映一个关键字的竞争激烈程度，非常不准，仅供参考
 for ($page_no = 1; $page_no <= $max_srh_page; $page_no++)
 {
  if ($page_no > 16) break;
  $fail_try = 1;
  $pn = ($page_no - 1) * 50;
  $url = "http://www.baidu.com/s?wd={$urlw}&pn={$pn}&rn=50";
  $snoopy = new snoopy;
//  $snoopy->proxy_host = "127.0.0.1"; //采集可选代理ip，以免频繁抓百度反被百度咬
//  $snoopy->proxy_port = "80";   //proxy代理所用端口
  $snoopy->fetch($url);
  $contents = iconv("gbk","utf-8//ignore",$snoopy->results);
  unset($snoopy);
//  echo $contents;
  if (!preg_match("/<span>此内容系百度根据您的指令自动搜索的结果/i",$contents,$out))
  {
   if ($fail_try > 5)
   {
    continue;
   }
   else
   {
    $fail_try++;
    $page_no--;
    sleep(30);
    continue;
   }
  }
  if (!isset($ebaidu))
  {
   $ebaidu = array('lt' => 0, 'lb' => 0, 'r' => 0); //记录百度推广数量，分为左上、左下、右侧
   if (preg_match_all("/<tr><td class="f ec_pp"><a id="awd+"/i", $contents, $out_lt))
   {
    $ebaidu['lt'] = count($out_lt[0]);
   }
   if (preg_match_all("/<table id="40d+".*?class="ec_mr15">/i", $contents, $out_lt))
   {
    $ebaidu['lt'] = count($out_lt[0]);
   }
   if (preg_match_all("/<table width="65%".*?class="ec_mr15">/i", $contents, $out_lb))
   {
    $ebaidu['lb'] = count($out_lb[0]);
   }
   if (preg_match_all("/<div id="bdfsd+" class="ec_pp".*?><a id=dfsd+/i", $contents, $out_r))
   {
    $ebaidu['r'] = count($out_r[0]);
   }
  }
  if (preg_match_all("/((<table cellpadding="0" cellspacing="0".*?id="(d+)" mu="(.*?)">)|(<table id="(d+)"  cellpadding="0" cellspacing="0" mu="(.*?)">))[s|s]*?((<a.*?href=".*?".*?>(.*?)</a>)|(<div id="app_.*?"></div>))/i", $contents, $out_mu))
  {
   foreach ($out_mu[0] as $om_key => $om_val)
   {
    $om_id1 = $out_mu[3][$om_key];
    $om_href1 = $out_mu[4][$om_key];
    $om_id2 = $out_mu[6][$om_key];
    $om_href2 = $out_mu[7][$om_key];
    $om_title = strip_tags($out_mu[10][$om_key]);
    $baidu_mus[] = $om_id1 . $om_id2;
    $dm_weight = $dm_weight + get_dm_weight($om_href1 . $om_href2, $om_id1 . $om_id2);
    if (preg_match("/://(w*?.)*?baidu.com//i", $om_href1 . $om_href2, $om_domain))
    {
     $baidu_ids[] = $om_id1 . $om_id2;
    }
    if (preg_match("/://(w*?.)*?{$d}//i", $om_href1 . $om_href2, $om_domain))
    {
     echo '<div style="clear:both"></div><span class="s_kw"><a href="http://www.baidu.com/s?wd=' . $urlw . '">' . $k . '</a></span><span class="s_rank">' . $om_id1 . $om_id2 . '</span><span class="s_wt"></span><span class="s_title"><a href="' . $om_href1 . $om_href2 . '">' . $om_title . '</a></span><span class="s_cache"></span>';
     $isrank = 1;
    }
   }
  }
  if (preg_match_all("/<table cellpadding="0" cellspacing="0" class="result" id="(d+)"><tr><td class=f><h3 class="t">(<font.*?</font>)?<a.*?href="(.*?)" target="_blank">(.*?)</a></h3><font size=-1>.*?<span class="g">.*? ((d{4}-d{1,2}-d{1,2})|(d+小时前)|(d+分钟前)) .*?</span>.*?<br></font></td></tr></table>/i", $contents, $out_all))
  {
   foreach ($out_all[0] as $o_key => $o_val)
   {
    $o_id = $out_all[1][$o_key];
    $o_href = $out_all[3][$o_key];
    $o_title = strip_tags($out_all[4][$o_key]);
    $o_cache = $out_all[6][$o_key] . $out_all[7][$o_key] . $out_all[8][$o_key];
    $dm_weight = $dm_weight + get_dm_weight($o_href, $o_id);
    if (preg_match("/://(w*?.)*?baidu.com//i", $o_href, $o_domain))
    {
     $baidu_ids[] = $o_id;
    }
    if (preg_match("/://(w*?.)*?{$d}//i", $o_href, $o_domain))
    {
     echo '<div style="clear:both"></div><span class="s_kw"><a href="http://www.baidu.com/s?wd=' . $urlw . '">' . $k . '</a></span><span class="s_rank">' . $o_id . '</span><span class="s_wt">' . $dm_weight . '%</span><span class="s_title"><a href="' . $o_href . '">' . $o_title . '</a></span><span class="s_cache">' . $o_cache . '</span>';
     $isrank = 1;
    }
   }
  }
  //$all_count用来检查上述正则匹配是否匹配到所有搜索结果，特别关注百度系列站点、百度开放平台以及百度应用等有别于普通搜索结果
  if (isset($out_mu[0])) $all_count = $all_count + count($out_mu[0]);
  if (isset($out_all[0])) $all_count = $all_count + count($out_all[0]);
//  echo '<br />总共找到' . $all_count . '个匹配<br />';
  if (!preg_match("/<a href="s?wd=.*?>下一页</a>.*?</p>/i",$contents,$out))
  {
   break;
  }
 }
 if (count($baidu_mus) >= 1)
 {
  $bmus = implode(",", $baidu_mus);
 }
 else
 {
  $bmus = '';
 }
 if (count($baidu_ids) >= 1)
 {
  $bids = implode(",", $baidu_ids);
 }
 else
 {
  $bids = '';
 }
 if ($isrank == 1)
 {
  echo '<span class="s_feng">上' . $ebaidu['lt'] . '下' . $ebaidu['lb'] . '右' . $ebaidu['r'] . '</span><span class="s_baidu">' . $bids . '</span><span class="s_mu">' . $bmus . '</span>';
 }
 else
 {
  echo '<div style="clear:both"></div><span class="s_kw"><a href="http://www.baidu.com/s?wd=' . $urlw . '">' . $k . '</a></span><span class="s_rank">0</span><span class="s_wt">' . $dm_weight . '%</span><span class="s_title"></span><span class="s_cache"></span><span class="s_feng">上' . $ebaidu['lt'] . '下' . $ebaidu['lb'] . '右' . $ebaidu['r'] . '</span><span class="s_baidu">' . $bids . '</span><span class="s_mu">' . $bmus . '</span>';
 }
 unset($ebaidu);
}
//逐个域名与关键字采集百度排名信息并显示
set_include_path(".");
include "snoopy.class.php";
set_time_limit(0);
ob_flush(); flush(); ob_end_clean(); ob_implicit_flush(1);
echo '<div id="kgrid">';
echo '<span class="s_kw">关键字</span><span class="s_rank">排名</span><span class="s_wt">竞争度</span><span class="s_title">网页标题</span><span class="s_cache">百度快照</span><span class="s_feng">百度推广数量</span><span class="s_baidu">百度占位</span><span class="s_mu">百度mu占位</span>';
foreach ($kwlist as $d_ks)
{
 $dm = $d_ks['domain'];
 echo '<div style="clear:both"></div><span class="s_bar">域名：' . $dm . '</span>';
 foreach ($d_ks['kword'] as $k)
 {
  fetch_baidu($dm, $k);
 }
}
echo '</div>';
?>
</div><!--div main end-->
</div><!--div wrap end-->
<?php
tongji();
?>
</body>
</html>

ajax php教程仿网易文章评论顶一下效果

<div class='plding fr'>
<a href='action.php?id="1&action=top_num'>顶一下</a>[5]
</div>

js ajax

<script language="网页特效" type="text/javascript">
<!--
// ajax检测评论是否已经支持过了
function getcookie(c_name){ //检测cookie
 if (document.cookie.length>0){
  c_start=document.cookie.indexof(c_name + "=")
  if(c_start!=-1){
   c_start=c_start + c_name.length+1;
   c_end=document.cookie.indexof(";",c_start);
   if(c_end==-1) c_end=document.cookie.length;
   return unescape(document.cookie.substring(c_start,c_end));
  }
 }
 return "";
}

function setcookie(c_name,value,expiredays){ //设置cookie
 var exdate=new date();
 exdate.setdate(exdate.getdate()+expiredays);
 document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.togmtstring());
}

function createxmlhttprequest(){ //创建xmlhttprequest对象
 if(window.activexobject){  //ie
  try {
   return new activexobject("microsoft.xmlhttp");
  } catch(e){
   return;
  }
 }else if(window.xmlhttprequest){ //mozilla,firefox
  try {
   return new xmlhttprequest();
  } catch(e){
   return;
  }
 }
}

function get_top_num(id){ //主调函数
 var get_top_cookie=getcookie('get_top_'+id+'_cookie');
 if(get_top_cookie!=null && get_top_cookie!=""){
  alert('此条评论你已经支持过了');
 }
 else{
  var xmlhttp=createxmlhttprequest();
  var url = "action.php?action=top_num&id="+id;
  if (id==""){
   return false ;
  }
  if (xmlhttp){
   callback = getreadystatehandler(xmlhttp,id);
   xmlhttp.onreadystatechange = callback;
   xmlhttp.open("get", url,true);
   xmlhttp.send(null);
  }
  setcookie('get_top_'+id+'_cookie','istop',1);
 }
}

function getreadystatehandler(xmlhttp,id){  //服务器返回后处理函数
 var top_num = document.getelementbyid("top_num_"+id).innerhtml;
 return function (){
  if(xmlhttp.readystate == 4){
   if(xmlhttp.status == 200){
    if (xmlhttp.responsetext==1){
     document.getelementbyid("top_num_"+id).innerhtml=number(top_num)+1;
    }
   }
  }
 }
}

//-->
</script>

php教程 自动分页类函数

不想重复的写sql代码，就用下面的函数去自动处理了。

$__t_page_moyo_html = '';
/**
*
* 临时代码：分页处理函数
* @param string $sql
*/
function page_moyo($sql = '')
{
    global $__t_page_moyo_html;
    if ($sql == '')
    {
        return $__t_page_moyo_html;
    }
    // config
    $max = 12;
    $flag = 'page';
    // step .1 处理sql语句
    $sql_count = preg_replace('/select.*?from/is', 'select count(*) as mcnt from', $sql);
    // step .2 获取数据量
    $result = dbc()->query($sql_count)->getrow();
    $total = $result['mcnt'];
    // step .3 判断是否需要分页
    if ($total < $max)
    {
        return $sql;
    }
    // step .4 获取当前页数
    $pn = isset($_get[$flag]) ? (int)$_get[$flag] : 1;
    if ($pn <= 0) $pn = 1;
    // step .5 重组sql语句
    $sql = $sql . ' limit '.($pn-1)*$max.','.$max;
    // step .6 组装分页html代码
    $url = $_server['request_uri'];
    if (preg_match('/'.$flag.'=d+/i', $url))
    {
        $url = preg_replace('/[&]?'.$flag.'=d+/', '', $url);
    }
    $pageall = ceil($total/$max);
    $pre = '';
    if ($pn > 1)
    {
        $pre = ' / <a href="'.$url.'&'.$flag.'='.($pn-1).'">上一页</a>';
    }
    $nxt = ' / <a href="'.$url.'&'.$flag.'='.($pn+1).'">下一页</a>';
    $html = '<a href="'.$url.'">首页</a>'.$pre.$nxt.' / <a href="'.$url.'&'.$flag.'='.$pageall.'">尾页</a>';
    $__t_page_moyo_html = $html;
    return $sql;
}

在进行sql查询前用page_moyo处理一下sql语句
     $sql = page_moyo($sql);
然后在需要显示分页链接的地方直接调用page_moyo输出
     echo page_moyo();

如果要连续进行两次大数据量sql查询的话就要在第一次查询后存储下当时的分页代码，不然下个sql查询就会覆盖掉了