最近HTTP遠程訪問的程序寫得多了，主要接觸的是.NET類庫裡的WebHttpRequest類和 Microsoft.XMLHTTP這個通用的對象，有了這些方便的類，我們可以通過C#，ASP，Javascript來模擬Web客戶端訪問其他的 Web頁面。但是今天想用PHP實現一下類似的功能，卻一時找不到方向了，於是只能自己“豐衣足食”了。
目前，PHP裡面還沒有類似於HttpRequest的類，不過在官方在線文檔中找到了這麼一個HttpRequest Class的頁面，不過也只是提及了此功能目前可能只有在CVS版本中存在，無奈...
要實現HTTP訪問無非就是用Socket發送一個請求，然後讀取返回信息。於是我就用Socket寫了一個HttpRequest的類，當然也可以用fsockopen()這個函數來實現，不過兩個的區別不是很大，具體代碼在附件裡，自己看咯。
<?php/*** Network: HTTP request object* Author: Li HouYu (Karajan Lee), Shanghai, China.*/class HttpRequest{var $sHostAdd;var $sUri;var $iPort;var $sRequestHeader;var $sResponse;function HttpRequest($sUrl){$sPatternUrlPart = /http://([a-z-.0-9]+)(:(d+)){0,1}(.*)/i;$arMatchUrlPart = array();preg_match($sPatternUrlPart, $sUrl, $arMatchUrlPart);$this->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];}}?>
