這篇文章主要介紹了php curl請(qǐng)求信息和返回信息設(shè)置代碼實(shí)例,本文直接給出代碼實(shí)例,需要的朋友可以參考下

在用curl抓取網(wǎng)頁(yè)內(nèi)容的時(shí)候，經(jīng)常要知道，網(wǎng)頁(yè)返回的請(qǐng)求頭信息，和請(qǐng)求的相關(guān)信息，特別是在請(qǐng)求過(guò)程中存在重定向的時(shí)候獲取請(qǐng)求返回頭信息對(duì)分析請(qǐng)求內(nèi)容很有幫助

下面就是一個(gè)請(qǐng)求中存在重定向的例子，我們的目的是要獲取最終實(shí)際請(qǐng)求的url地址

$url='http://www.appchina.com/market/r/489267/com.appshare.android.ilisten.vapk?c=aplus.direct&uid=gAJ9cQEu1TlyZxsXN-aB4RaanvFL6t6Bj-vj0rIBs&p=aplus.detail&m=redirect';

$ch=curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

//curl_setopt($ch, CURLOPT_POST, 1);

//curl_setopt($ch, CURLOPT_POSTFIELDS, $params);

curl_setopt($ch, CURLOPT_HEADER, 1);//返回response頭部信息

curl_setopt($ch, CURLOPT_NOBODY, 1);//不返回response body內(nèi)容

//curl_setopt($ch, CURLOPT_MAXREDIRS, 1);//設(shè)置請(qǐng)求最多重定向的次數(shù)

curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);//不直接輸出response

curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);//如果返回的response 頭部中存在Location值，就會(huì)遞歸請(qǐng)求

$content=curl_exec($ch);

$rinfo=curl_getinfo($ch);

echo $content,"</br>";

echo "<hr>";

print_r($rinfo);

下面是輸出的結(jié)果

HTTP/1.1 200 OKServer: nginxDate: Sat, 22 Dec 2012 06:17:44 GMTContent-Type: application/vnd.android.package-archiveConnection: closeLast-Modified: Mon, 03 Dec 2012 16:00:00 GMTExpires: Tue, 03 Dec 2013 16:00:00 GMTCache-Control: max-age=31536000Content-Length: 2142149

Array( [url] => [content_type] => application/vnd.android.package-archive [http_code] => 200 [header_size] => 289 [request_size] => 196 [filetime] => -1 [ssl_verify_result] => 0 [redirect_count] => 0 [total_time] => 0.171621 [namelookup_time] => 0.135256 [connect_time] => 0.152913 [pretransfer_time] => 0.152916 [size_upload] => 0 [size_download] => 0 [speed_download] => 0 [speed_upload] => 0 [download_content_length] => 2142149 [upload_content_length] => 0 [starttransfer_time] => 0.171582 [redirect_time] => 0 [certinfo] => Array ( ))

可以看到，經(jīng)過(guò)遞歸請(qǐng)求后最終得到一個(gè)200的response,但是這中方式不能得到最后一次請(qǐng)求的url，也就是最終實(shí)際請(qǐng)求的url，要想得到這個(gè)url就需要遞歸的分析每次請(qǐng)求返回的response

下面是我寫的一個(gè)獲取最后一次請(qǐng)求url的遞歸函數(shù)

$url='http://www.appchina.com/market/r/489267/com.appshare.android.ilisten.vapk?c=aplus.direct&uid=gAJ9cQEu1TlyZxsXN-aB4RaanvFL6t6Bj-vj0rIBs&p=aplus.detail&m=redirect';

[php] view plaincopy

$realUrl=getRedirectLocation($url);

echo "</br>--->",$realUrl;

function getRedirectLocation($url){

$realUrl=$url;

echo $url,"</br>";

$ch=curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_HEADER, 1);curl_setopt($ch, CURLOPT_TIMEOUT, 3);//設(shè)置curl執(zhí)行時(shí)間不超過(guò)3秒

//curl_setopt($ch, CURLOPT_NOBODY, 1);//這行不能要，如果添上，那么在遇到302重定向的時(shí)候就會(huì)得不到真正的請(qǐng)求url

curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

$content=curl_exec($ch);

//echo $content;

$rinfo=curl_getinfo($ch);

$matches=array();

if(preg_match('/Location:\s+?(.+?)\s+?/', $content,$matches)){

//echo $matches[1],"</br>";

unset($content);

$realUrl=getRedirectLocation($matches[1]);

}

if(isset($content)){

unset($content);

}

return $realUrl;

}

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