我正在尝试获取一个简单的字符串，其中包含我使用 search-by-image 搜索的图像的描述.所以我设置了我的 search_by_google.php 页面:

    <?php
$url = $_REQUEST['url'];

if(empty($_REQUEST['raw'])){
$raw = false;
}
else{
$raw = true;
}
echo fetch_google($url, $raw);

function fetch_google($u, $raw, $terms="sample search",$numpages=1,$user_agent='Mozilla/5.0 (Windows NT 6.1; rv:8.0) Gecko/20100101 Firefox/8.0')
{

    $ch = curl_init();
    $url = 'http://www.google.com/imghp?hl=en&tab=wi';
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_USERAGENT, $user_agent);
    curl_setopt ($ch, CURLOPT_HEADER, TRUE);
    curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, TRUE);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt ($ch, CURLOPT_VERBOSE,true);
    curl_setopt ($ch, CURLOPT_REFERER, 'http://www.google.com/');
    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT,120);
    curl_setopt ($ch, CURLOPT_TIMEOUT,120);
    curl_setopt ($ch, CURLOPT_MAXREDIRS,10);
    curl_setopt ($ch, CURLOPT_COOKIEFILE,"./cookie.txt");
    curl_setopt ($ch, CURLOPT_COOKIEJAR,"./cookie.txt");
    curl_setopt ($ch, CURLOPT_VERBOSE,true);
    curl_exec($ch);

$searched="";
for($i=0;$i<=$numpages;$i++)
{
    $ch = curl_init();
    $url="http://www.google.com/searchbyimage?hl=en&image_url=".urlencode($u);
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_USERAGENT, $user_agent);
    curl_setopt ($ch, CURLOPT_HEADER, TRUE);
    curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, TRUE);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt ($ch, CURLOPT_VERBOSE,true);
    curl_setopt ($ch, CURLOPT_REFERER, 'http://www.google.com/imghp?hl=en&tab=wi');
    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT,120);
    curl_setopt ($ch, CURLOPT_TIMEOUT,120);
    curl_setopt ($ch, CURLOPT_MAXREDIRS,10);
    curl_setopt ($ch, CURLOPT_COOKIEFILE,"cookie.txt");
    curl_setopt ($ch, CURLOPT_COOKIEJAR,"cookie.txt");
    $searched=$searched.curl_exec ($ch);
    curl_close ($ch);
}
if($raw){
        return $searched;
    }
    else{
        $matches = array();
        preg_match('/Best guess for this image:[^<]+<a[^>]+>([^<]+)/', $searched, $matches);
        return (count($matches) > 1 ? $matches[1] : false);
    }
 }
  ?>

我已经更改了所有 curl 选项，但如果我转到 http://www.mysite.altervista.org/search_by_google.php?url=http://www.mysite.org/asdasd.jpg&raw=false

它让我一直说 302 移动

我已经更改了我的代码放置

    curl_setopt ($ch, CURLOPT_HEADER, TRUE);

在第二个 curl_init() 中，现在它给了我这条消息:

编辑 25/03/2014 19:34

我像 Sabuj Hassan 说的那样更改了我的代码，现在的日志是:

HTTP/1.0 302 Found Cache-Control: public, max-age=21600 Date: Tue, 25 Mar 2014 18:30:07 GMT Age: 16 Location: http://www.google.com/search?tbs=sbi:AMhZZisAo2ZcfY19aFUJcEj26M4zKc9ZuxzfsUPzLuUJk-pd-siPwiplqIcGN5tW1XPU16-XFg1EoK7jc5IU3BKoEHYnwZo7RmuhyF5p9qaZwSgq4FKRkNW44JgzTi4Mr8g6ezNMQ6YzaAEQ-uFbPMNzY40NrE3uB7ePm4BGNowF34PiIjLOiVLkWwQ7sRoBVMoVgzBbAP7rDwHee5LyGF8Dq6QOT1TEhsURduPD6exzITyRl77agELdpTFSi-JXDncI6c4KdcuQYSx2LknnIW6nippmpPf3X5OYGn1CFZw13rlFPitLSY0Ang0COuSXKdpBy6B8Dak9QZNZ9VFB4HBRfnMFiyuBvQtyhAg2LeOnRbjnunGB0P1RlwKBF4hRId7wUdTu4Dfab5DQu9hGauLKcd7GcP4g-jQXx_1gymwDdZnPXLzZp1mkjVMX9GFSppj-IRWp3FVVqChsPEzKXdraevuWJFukjUdF87dU_1kLKO23lC8L3kusy05zcq7ZxyF1dHNfQ0vYJeWumtbRosJNuEcqiSyVW_1-bF104HMJLdCA0gr5VyIZolkcZok4W1sgjFYTWvfj6f0proaGE24HSO4Ov2hmhAy9HQUCr3e-KjgqyP4AOtlmI3VsuLu34jKSo0t4tWbb5PVBi1_1oebuv4oisdVdw22a6CRH2tiw8wg6Ya1VgxsXhyj8U7lrQ8cBHVDKlOI6EimXtnELBHyDNQT1Zpsz1hK10GYvFaRNMFd7Rqmg87CLdycgyRV-sYxNWxIu9agNgHTwuU1W-GgeWWcM9noeMwgqMKSGh9lt_1hda3ZWrcA4Y1MeiG55b4ZYvOjcm9t9iIy6LA2S4AjC2X1qZHvJtSqzgfOz8yTuX5jUHqCl0jI1FdOSmqZV1GqQ0uaJfsuchlsWUULfUJBzFiGkAuOqIzU0bpXLNqLHoYPJUPwr66H6jWPFLsWAS9_1GRNj70s30jfbzcS0NUShUvE2meUhlpx-f5M0nmS0zvf-3OQOUkXlYO2VUZ4x9y8G76hHoTkDxqzhhGrgohyFmkUvAWmSkHTBpbP6gek8cyrmBnXuedSV3r2O71G8CUbdHFxfIO8FWlkGj1cUYu60PoKF6hndjZsOlV-dSNXfOTKeC1jPtf5ycXA0s0xLK7_1K0iWxhfmVq62WgQ4O3Prc4b6bcJm8M1Q9xZhhsElisuUyVTN9-dDMNUZ1h0tUe9oGsZYLh9vjEsMokqBXFM_1igHOfgRn4I17Xt8EBMZI9cEjakByjv-g5Pt9tG69RQm765HLhf8VpafvE5Z3BwDpZs4x5uMkVDURT9qcA&hl=en Server: quimby_frontend Content-Length: 1566 Content-Type: text/html; charset=UTF-8 Expires: Wed, 26 Mar 2014 00:30:07 GMT Alternate-Protocol: 80:quic X-Content-Type-Options: nosniff X-Frame-Options: SAMEORIGIN X-XSS-Protection: 1; mode=block
302 Moved

The document has moved here. HTTP/1.0 302 Found Cache-Control: public, max-age=21600 Date: Tue, 25 Mar 2014 18:30:07 GMT Age: 16 Location: http://www.google.com/search?tbs=sbi:AMhZZisAo2ZcfY19aFUJcEj26M4zKc9ZuxzfsUPzLuUJk-pd-siPwiplqIcGN5tW1XPU16-XFg1EoK7jc5IU3BKoEHYnwZo7RmuhyF5p9qaZwSgq4FKRkNW44JgzTi4Mr8g6ezNMQ6YzaAEQ-uFbPMNzY40NrE3uB7ePm4BGNowF34PiIjLOiVLkWwQ7sRoBVMoVgzBbAP7rDwHee5LyGF8Dq6QOT1TEhsURduPD6exzITyRl77agELdpTFSi-JXDncI6c4KdcuQYSx2LknnIW6nippmpPf3X5OYGn1CFZw13rlFPitLSY0Ang0COuSXKdpBy6B8Dak9QZNZ9VFB4HBRfnMFiyuBvQtyhAg2LeOnRbjnunGB0P1RlwKBF4hRId7wUdTu4Dfab5DQu9hGauLKcd7GcP4g-jQXx_1gymwDdZnPXLzZp1mkjVMX9GFSppj-IRWp3FVVqChsPEzKXdraevuWJFukjUdF87dU_1kLKO23lC8L3kusy05zcq7ZxyF1dHNfQ0vYJeWumtbRosJNuEcqiSyVW_1-bF104HMJLdCA0gr5VyIZolkcZok4W1sgjFYTWvfj6f0proaGE24HSO4Ov2hmhAy9HQUCr3e-KjgqyP4AOtlmI3VsuLu34jKSo0t4tWbb5PVBi1_1oebuv4oisdVdw22a6CRH2tiw8wg6Ya1VgxsXhyj8U7lrQ8cBHVDKlOI6EimXtnELBHyDNQT1Zpsz1hK10GYvFaRNMFd7Rqmg87CLdycgyRV-sYxNWxIu9agNgHTwuU1W-GgeWWcM9noeMwgqMKSGh9lt_1hda3ZWrcA4Y1MeiG55b4ZYvOjcm9t9iIy6LA2S4AjC2X1qZHvJtSqzgfOz8yTuX5jUHqCl0jI1FdOSmqZV1GqQ0uaJfsuchlsWUULfUJBzFiGkAuOqIzU0bpXLNqLHoYPJUPwr66H6jWPFLsWAS9_1GRNj70s30jfbzcS0NUShUvE2meUhlpx-f5M0nmS0zvf-3OQOUkXlYO2VUZ4x9y8G76hHoTkDxqzhhGrgohyFmkUvAWmSkHTBpbP6gek8cyrmBnXuedSV3r2O71G8CUbdHFxfIO8FWlkGj1cUYu60PoKF6hndjZsOlV-dSNXfOTKeC1jPtf5ycXA0s0xLK7_1K0iWxhfmVq62WgQ4O3Prc4b6bcJm8M1Q9xZhhsElisuUyVTN9-dDMNUZ1h0tUe9oGsZYLh9vjEsMokqBXFM_1igHOfgRn4I17Xt8EBMZI9cEjakByjv-g5Pt9tG69RQm765HLhf8VpafvE5Z3BwDpZs4x5uMkVDURT9qcA&hl=en Server: quimby_frontend Content-Length: 1566 Content-Type: text/html; charset=UTF-8 Expires: Wed, 26 Mar 2014 00:30:07 GMT Alternate-Protocol: 80:quic X-Content-Type-Options: nosniff X-Frame-Options: SAMEORIGIN X-XSS-Protection: 1; mode=block
302 Moved

The document has moved here.

最佳答案

您的服务器上的 curl 可能会阻止以下重定向。所以我建议你手动处理重定向。就像这个:

首先是你的 curl 函数。如果您愿意，可以添加其他 curl 选项:

function curl($url, $user_agent, $retry=0){
    if($retry > 5){
        print "Maximum 5 retries are done, skipping!\n";
        return "in loop!";
    }

    $ch = curl_init();
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_USERAGENT, $user_agent);
    curl_setopt ($ch, CURLOPT_HEADER, TRUE);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt ($ch, CURLOPT_REFERER, 'http://www.google.com/');
    curl_setopt ($ch, CURLOPT_COOKIEFILE,"./cookie.txt");
    curl_setopt ($ch, CURLOPT_COOKIEJAR,"./cookie.txt");
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    $result = curl_exec($ch);
    curl_close($ch);

    // handling the follow redirect
    if(preg_match("|Location: (https?://\S+)|", $result, $m)){
        print "Manually doing follow redirect!\n$m[1]\n";
        return curl($m[1], $user_agent, $retry + 1);
    }

    // add another condition here if the location is like Location: /home/products/index.php

    return $result;
}

它应该这样称呼:

$response = curl("http://www.google.com/", "Mozilla 5.0");
print "$response\n";

我正在解析 Location: header 中的后续链接。链接不是以 http:// 开头的情况可能会发生这种情况，在那边添加另一个条件。

关于PHP 按图像搜索 Google cURL 返回 302 已移动，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22570970/