本文實例講述了php實現httpRequest的方法。分享給大家供大家參考。具體如下：
想從學校圖書館的網站上抓取數據處理之後在返回給浏覽器，試了不少方法。首先試了http_request()，但是這個學院pecl_http支持，後來又試了網上流傳甚廣的class HttpRequest，可能是我不會使用，也失敗了。後來看到了函數httpRequest($url, $post='', $method='GET', $limit=0, $returnHeader=FALSE, $cookie='', $bysocket=FALSE, $ip='', $timeout=15, $block=TRUE)，用它成功了，因此貼出來分享一下。函數代碼如下：
復制代碼 代碼如下:<?php
/**
* Respose A Http Request
*
* @param string $url
* @param array $post
* @param string $method
* @param bool $returnHeader
* @param string $cookie
* @param bool $bysocket
* @param string $ip
* @param integer $timeout
* @param bool $block
* @return string Response
*/
function httpRequest($url,$post='',$method='GET',$limit=0,$returnHeader=FALSE,$cookie='',$bysocket=FALSE,$ip='',$timeout=15,$block=TRUE) {
$return = '';
$matches = parse_url($url);
!isset($matches['host']) && $matches['host'] = '';
!isset($matches['path']) && $matches['path'] = '';
!isset($matches['query']) && $matches['query'] = '';
!isset($matches['port']) && $matches['port'] = '';
$host = $matches['host'];
$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';
$port = !empty($matches['port']) ? $matches['port'] : 80;
if(strtolower($method) == 'post') {
$post = (is_array($post) and !empty($post)) ? http_build_query($post) : $post;
$out = "POST $path HTTP/1.0\r\n";
$out .= "Accept: */*\r\n";
//$out .= "Referer: $boardurl\r\n";
$out .= "Accept-Language: zh-cn\r\n";
$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
$out .= "Host: $host\r\n";
$out .= 'Content-Length: '.strlen($post)."\r\n";
$out .= "Connection: Close\r\n";
$out .= "Cache-Control: no-cache\r\n";
$out .= "Cookie: $cookie\r\n\r\n";
$out .= $post;
} else {
$out = "GET $path HTTP/1.0\r\n";
$out .= "Accept: */*\r\n";
//$out .= "Referer: $boardurl\r\n";
$out .= "Accept-Language: zh-cn\r\n";
$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
$out .= "Host: $host\r\n";
$out .= "Connection: Close\r\n";
$out .= "Cookie: $cookie\r\n\r\n";
}
$fp = fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);
if(!$fp) return ''; else {
$header = $content = '';
stream_set_blocking($fp, $block);
stream_set_timeout($fp, $timeout);
fwrite($fp, $out);
$status = stream_get_meta_data($fp);
if(!$status['timed_out']) {//未超時
while (!feof($fp)) {
$header .= $h = fgets($fp);
if($h && ($h == "\r\n" || $h == "\n")) break;
}
$stop = false;
while(!feof($fp) && !$stop) {
$data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));
$content .= $data;
if($limit) {
$limit -= strlen($data);
$stop = $limit <= 0;
}
}
}
fclose($fp);
return $returnHeader ? array($header,$content) : $content;
}
}
?>
調用也很簡單的。簡單的例子：
復制代碼 代碼如下:echo httpRequest('http://www.baidu.com');
希望本文所述對大家的php程序設計有所幫助。
