用PHP的Socket实现HTTP请求_PHP教程

最近HTTP远程访问的程序写得多了，主要接触的是.NET类库里的WebHttpRequest类和 Microsoft.XMLHTTP这个通用的对象，有了这些方便的类，我们可以通过C#，ASP，Javascript来模拟Web客户端访问其他的 Web页面。但是今天想用PHP实现一下类似的功能，却一时找不到方向了，于是只能自己“丰衣足食”了。

目前，PHP里面还没有类似于HttpRequest的类，不过在官方在线文档中找到了这么一个HttpRequest Class的页面，不过也只是提及了此功能目前可能只有在CVS版本中存在，无奈...

要实现HTTP访问无非就是用Socket发送一个请求，然后读取返回信息。于是我就用Socket写了一个HttpRequest的类，当然也可以用fsockopen()这个函数来实现，不过两个的区别不是很大，具体代码在附件里，自己看咯。

sHostAdd = gethostbyname($arMatchUrlPart[1]);if (empty($arMatchUrlPart[4])){$this->sUri = /;}else{$this->sUri = $arMatchUrlPart[4];}if (empty($arMatchUrlPart[3])){$this->iPort = 80;}else{$this->iPort = $arMatchUrlPart[3];}$this->addRequestHeader(Host: .$arMatchUrlPart[1]);$this->addRequestHeader(Connection: Close);}function addRequestHeader($sHeader){$this->sRequestHeader .= trim($sHeader)." ";}function sendRequest($sMethod = GET, $sPostData = ){$sRequest = $sMethod." ".$this->sUri." HTTP/1.1 ";$sRequest .= $this->sRequestHeader;if ($sMethod == POST){$sRequest .= "Content-Type: application/x-www-form-urlencoded ";$sRequest .= "Content-Length: ".strlen($sPostData)." ";$sRequest .= " ";$sRequest .= $sPostData." ";}$sRequest .= " ";$sockHttp = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);if (!$sockHttp){die(socket_create() failed!);}$resSockHttp = socket_connect($sockHttp, $this->sHostAdd, $this->iPort);if (!$resSockHttp){die(socket_connect() failed!);}socket_write($sockHttp, $sRequest, strlen($sRequest));$this->sResponse = ;while ($sRead = socket_read($sockHttp, 4096)){$this->sResponse .= $sRead;}socket_close($sockHttp);}function getResponse(){return $this->sResponse;}function getResponseBody(){$sPatternSeperate = / /;$arMatchResponsePart = preg_split($sPatternSeperate, $this->sResponse, 2);return $arMatchResponsePart[1];}function getResponseHead(){$sPatternSeperate = / /;$arMatchResponsePart = preg_split($sPatternSeperate, $this->sResponse, 2);return $arMatchResponsePart[0];}}?>