PHP CURL采集百度搜寻结果图片不显示问题的解决方法

1.根据关键字采集百度搜寻结果
根据关键字采集百度搜寻结果，可以使用curl实现，代码如下：

<?phpfunction doCurl（$url, $data=array（）, $header=array（）, $timeout=30）{$ch = curl_init（）;curl_setopt（$ch, CURLOPT_URL, $url）;curl_setopt（$ch, CURLOPT_HTTPHEADER, $header）;curl_setopt（$ch, CURLOPT_RETURNTRANSFER, true）;curl_setopt（$ch, CURLOPT_FOLLOWLOCATION, true）;curl_setopt（$ch, CURLOPT_TIMEOUT, $timeout）;$response = curl_exec（$ch）;if（$error=curl_error（$ch））{die（$error）;}curl_close（$ch）;return $response;}$wd = "仙剑奇侠传";$url = "http://www.baidu.com/s?wd=".urlencode（$wd）;$data = array（）;$header = array（）;$response = doCurl（$url, $data, $header, 5）;echo $response;?>

输出后发现有部分图片不能显示

这里写图片描述
2.采集后的图片不显示原因分析
直接在百度中搜寻，页面是可以显示图片的。使用firebug查看图片路径，发现采集的图片域名与在百度搜寻的图片域名不同。
采集返回的图片域名 t11.baidu.com

这里写图片描述
正常搜寻的图片域名 ss1.baidu.com

这里写图片描述
查看采集与正常搜寻的html，发现有个域名转换的js是不一样的
采集

var list = {"graph.baidu.com": "http://graph.baidu.com","t1.baidu.com":"http://t1.baidu.com","t2.baidu.com":"http://t2.baidu.com","t3.baidu.com":"http://t3.baidu.com","t10.baidu.com":"http://t10.baidu.com","t11.baidu.com":"http://t11.baidu.com","t12.baidu.com":"http://t12.baidu.com","i7.baidu.com":"http://i7.baidu.com","i8.baidu.com":"http://i8.baidu.com","i9.baidu.com":"http://i9.baidu.com",};

正常搜寻

var list = {"graph.baidu.com": "https://sp0.baidu.com/-aYHfD0a2gU2pMbgoY3K","t1.baidu.com":"https://ss0.baidu.com/6ON1bjeh1BF3odCf","t2.baidu.com":"https://ss1.baidu.com/6OZ1bjeh1BF3odCf","t3.baidu.com":"https://ss2.baidu.com/6OV1bjeh1BF3odCf","t10.baidu.com":"https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq","t11.baidu.com":"https://ss1.baidu.com/6ONXsjip0QIZ8tyhnq","t12.baidu.com":"https://ss2.baidu.com/6ONYsjip0QIZ8tyhnq","i7.baidu.com":"https://ss0.baidu.com/73F1bjeh1BF3odCf","i8.baidu.com":"https://ss0.baidu.com/73x1bjeh1BF3odCf","i9.baidu.com":"https://ss0.baidu.com/73t1bjeh1BF3odCf",};

因此可以断定是，百度根据来源地址、IP、header等参数，判断如果是采集的，则返回不同的js。
3.采集后图片不显示的解决方法
把采集到的html，根据定义的域名做一次批量转换即可。

<?phpfunction doCurl（$url, $data=array（）, $header=array（）, $timeout=30）{$ch = curl_init（）;curl_setopt（$ch, CURLOPT_URL, $url）;curl_setopt（$ch, CURLOPT_HTTPHEADER, $header）;curl_setopt（$ch, CURLOPT_RETURNTRANSFER, true）;curl_setopt（$ch, CURLOPT_FOLLOWLOCATION, true）;curl_setopt（$ch, CURLOPT_TIMEOUT, $timeout）;$response = curl_exec（$ch）;if（$error=curl_error（$ch））{die（$error）;}curl_close（$ch）;return $response;}// 域名转换function cdomain（$str）{$baidu_domain = "{"http://graph.baidu.com": "https://sp0.baidu.com/-aYHfD0a2gU2pMbgoY3K","http://p.qiao.baidu.com":"https://sp0.baidu.com/5PoXdTebKgQFm2e88IuM_a","http://vse.baidu.com":"https://sp3.baidu.com/6qUDsjip0QIZ8tyhnq","http://hdpreload.baidu.com":"https://sp3.baidu.com/7LAWfjuc_wUI8t7jm9iCKT-xh_","http://lcr.open.baidu.com":"https://sp2.baidu.com/8LUYsjW91Qh3otqbppnN2DJv","http://kankan.baidu.com":"https://sp3.baidu.com/7bM1dzeaKgQFm2e88IuM_a","http://xapp.baidu.com":"https://sp2.baidu.com/yLMWfHSm2Q5IlBGlnYG","http://dr.dh.baidu.com":"https://sp0.baidu.com/-KZ1aD0a2gU2pMbgoY3K","http://xiaodu.baidu.com":"https://sp0.baidu.com/yLsHczq6KgQFm2e88IuM_a","http://sensearch.baidu.com":"https://sp1.baidu.com/5b11fzupBgM18t7jm9iCKT-xh_","http://s1.bdstatic.com":"https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K","http://olime.baidu.com":"https://sp0.baidu.com/8bg4cTva2gU2pMbgoY3K","http://app.baidu.com":"https://sp2.baidu.com/9_QWsjip0QIZ8tyhnq","http://i.baidu.com":"https://sp0.baidu.com/74oIbT3kAMgDnd_","http://c.baidu.com":"https://sp0.baidu.com/9foIbT3kAMgDnd_","http://sclick.baidu.com":"https://sp0.baidu.com/5bU_dTmfKgQFm2e88IuM_a","http://nsclick.baidu.com":"https://sp1.baidu.com/8qUJcD3n0sgCo2Kml5_Y_D3","http://sestat.baidu.com":"https://sp1.baidu.com/5b1ZeDe5KgQFm2e88IuM_a","http://eclick.baidu.com":"https://sp3.baidu.com/-0U_dTmfKgQFm2e88IuM_a","http://api.map.baidu.com":"https://sp2.baidu.com/9_Q4sjOpB1gCo2Kml5_Y_D3","http://ecma.bdimg.com":"https://ss1.bdstatic.com/-0U0bXSm1A5BphGlnYG","http://ecmb.bdimg.com":"https://ss0.bdstatic.com/-0U0bnSm1A5BphGlnYG","http://t1.baidu.com":"https://ss0.baidu.com/6ON1bjeh1BF3odCf","http://t2.baidu.com":"https://ss1.baidu.com/6OZ1bjeh1BF3odCf","http://t3.baidu.com":"https://ss2.baidu.com/6OV1bjeh1BF3odCf","http://t10.baidu.com":"https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq","http://t11.baidu.com":"https://ss1.baidu.com/6ONXsjip0QIZ8tyhnq","http://t12.baidu.com":"https://ss2.baidu.com/6ONYsjip0QIZ8tyhnq","http://i7.baidu.com":"https://ss0.baidu.com/73F1bjeh1BF3odCf","http://i8.baidu.com":"https://ss0.baidu.com/73x1bjeh1BF3odCf","http://i9.baidu.com":"https://ss0.baidu.com/73t1bjeh1BF3odCf","http://b1.bdstatic.com":"https://ss0.bdstatic.com/9uN1bjq8AAUYm2zgoY3K","http://ss.bdimg.com":"https://ss1.bdstatic.com/5aV1bjqh_Q23odCf","http://opendata.baidu.com":"https://sp0.baidu.com/8aQDcjqpAAV3otqbppnN2DJv","http://api.open.baidu.com":"https://sp0.baidu.com/9_Q4sjW91Qh3otqbppnN2DJv","http://tag.baidu.com":"https://sp1.baidu.com/6LMFsjip0QIZ8tyhnq","http://f3.baidu.com":"https://sp2.baidu.com/-uV1bjeh1BF3odCf","http://s.share.baidu.com":"https://sp0.baidu.com/5foZdDe71MgCo2Kml5_Y_D3","http://bdimg.share.baidu.com":"https://ss1.baidu.com/9rA4cT8aBw9FktbgoI7O1ygwehsv","http://1.su.bdimg.com":"https://ss0.bdstatic.com/k4oZeXSm1A5BphGlnYG","http://2.su.bdimg.com":"https://ss1.bdstatic.com/kvoZeXSm1A5BphGlnYG","http://3.su.bdimg.com":"https://ss2.bdstatic.com/kfoZeXSm1A5BphGlnYG","http://4.su.bdimg.com":"https://ss3.bdstatic.com/lPoZeXSm1A5BphGlnYG","http://5.su.bdimg.com":"https://ss0.bdstatic.com/l4oZeXSm1A5BphGlnYG","http://6.su.bdimg.com":"https://ss1.bdstatic.com/lvoZeXSm1A5BphGlnYG","http://7.su.bdimg.com":"https://ss2.bdstatic.com/lfoZeXSm1A5BphGlnYG","http://8.su.bdimg.com":"https://ss3.bdstatic.com/iPoZeXSm1A5BphGlnYG"}";$domain = json_decode（$baidu_domain, true）;foreach（$domain as $k=>$v）{$str = str_replace（$k, $v, $str）;}return $str;}$wd = "仙剑奇侠传";$url = "http://www.baidu.com/s?wd=".urlencode（$wd）;$data = array（）;$header = array（）;$response = doCurl（$url, $data, $header, 5）;echo cdomain（$response）; // 调用域名转换?>

增加域名转换后，所有的图片都可以正常显示。

这里写图片描述
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