分享一个强大的采集类，还可以模拟php多进程

<?php
//数据采集，doGET,doPOST
class Http
{//类定义开始
//通过get方式获取数据
static public function doGet($url,$timeout=5)
{
$code=self::getSupport();
switch($code)
{
case 1:return self::curl($url,‘‘,$timeout);break;
case 2:return self::socketGet($url,$timeout);break;
case 3:return @file_get_contents($url);break;
default:return false;
}
}
//通过POST方式发送数据
static public function doPost($url,$data,$timeout=5)
{
$code=self::getSupport();
switch($code)
{
case 1:return self::curl($url,$data,$timeout);break;
case 2:return self::socketPost($url,$data,$timeout);break;
default:return false;
}
}

//获取支持读取远程文件的方式
static public function getSupport()
{
if(function_exists(‘curl_init‘))//curl方式
{
return 1;
}
else if(function_exists(‘fsockopen‘))//socket
{
return 2;
}
else if(function_exists(‘file_get_contents‘))//php系统函数file_get_contents
{
return 3;
}
else if(ini_get(‘allow_url_fopen‘)&&function_exists(‘fopen‘))//php系统函数fopen
{
return 4;
}
else
{
return 0;
}
}
static public function GetHttpContent($fsock=null) {
$out = null;
while($buff = @fgets($fsock, 2048)){
$out .= $buff;
}
fclose($fsock);
$pos = strpos($out, "\r\n\r\n");
$head = substr($out, 0, $pos); //http head
$status = substr($head, 0, strpos($head, "\r\n")); //http status line
$body = substr($out, $pos + 4, strlen($out) - ($pos + 4));//page body
if(preg_match("/^HTTP\/\d\.\d\s([\d]+)\s.*$/", $status, $matches)){
if(intval($matches[1]) / 100 == 2){
return $body;
}else{
return false;
}
}else{
return false;
}
}
static public function socketGet($url,$timeout=5){
$url2 = parse_url($url);
$url2["path"] = isset($url2["path"])? $url2["path"]: "/" ;
$url2["port"] = isset($url2["port"])? $url2["port"] : 80;
$url2["query"] = isset($url2["query"])? "?".$url2["query"] : "";
$host_ip = @gethostbyname($url2["host"]);
$fsock_timeout = $timeout; //超时时间
if(($fsock = fsockopen($host_ip, $url2[‘port‘], $errno, $errstr, $fsock_timeout)) < 0){
return false;
}
$request = $url2["path"] .$url2["query"];
$in = "GET " . $request . " HTTP/1.1\r\n";
$in .= "Accept: */*\r\n";
// $in .= "User-Agent: Payb-Agent\r\n";
$in .= "Host: " . $url2["host"] . "\r\n";
$in .= "Connection: Close\r\n\r\n";
if(!@fwrite($fsock, $in, strlen($in))){
@fclose($fsock);
return false;
}
return self::GetHttpContent($fsock);
}

static public function socketPost($url,$post_data=array(),$timeout=5){
$url2 = parse_url($url);
$url2["path"] = ($url2["path"] == "" ? "/" : $url2["path"]);
$url2["port"] = ($url2["port"] == "" ? 80 : $url2["port"]);
$host_ip = @gethostbyname($url2["host"]);
$fsock_timeout = $timeout; //超时时间
if(($fsock = fsockopen($host_ip, $url2[‘port‘], $errno, $errstr, $fsock_timeout)) < 0){
return false;
}
$request = $url2["path"].($url2["query"] ? "?" . $url2["query"] : "");
$post_data2 = http_build_query($post_data);
$in = "POST " . $request . " HTTP/1.1\r\n";
$in .= "Accept: */*\r\n";
$in .= "Host: " . $url2["host"] . "\r\n";
// $in .= "User-Agent: Lowell-Agent\r\n";
$in .= "Content-type: application/x-www-form-urlencoded\r\n";
$in .= "Content-Length: " . strlen($post_data2) . "\r\n";
$in .= "Connection: Close\r\n\r\n";
$in .= $post_data2 . "\r\n\r\n";
unset($post_data2);
if(!@fwrite($fsock, $in, strlen($in))){
@fclose($fsock);
return false;
}
return self::GetHttpContent($fsock);
}

static public function curl($url, $data=array(), $timeout=5)
{
$ch = curl_init();
if (is_array($data) && $data)
{
$formdata = http_build_query($data);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $formdata);
}
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}

}//类定义结束
?>