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Home Backend Development PHP Tutorial php通过curl单独抓取网页可以,抓取多个会出错

php通过curl单独抓取网页可以,抓取多个会出错

Jun 06, 2016 pm 08:27 PM
curl php

使用curl单独抓取http://jobs.hubu.edu.cn/Detail.aspx?ArticleChannelId=81&ArticleId=5722可行,但是如果抓取相同类型的一系列网站就会出错,将他们放在数组
$linkList中,分别是http://jobs.hubu.edu.cn/Detail.aspx?ArticleChannelId=81&ArticleId=5722, http://jobs.hubu.edu.cn/Detail.aspx?ArticleChannelId=81&ArticleId=5325等等。
php通过curl单独抓取网页可以,抓取多个会出错

function getJobsHubuNotice()

{
            
    $curl = curl_init('http://jobs.hubu.edu.cn/List.aspx?ArticleChannelId=81');
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($curl);
            //内容处理
    $result = strip_tags($result,'<a>');
    $result = stristr($result, 'nbsp当前位置:');
    $result = str_replace('nbsp当前位置:', '', $result);
    $result = stristr($result, '当前1/2页',true);
    $result = stristr($result, '通知公告');
    $result = str_replace('通知公告</a>', '', $result);
    preg_match_all('/(?<=href=\").*?(?=\")/', $result, $arrayTemp);
    $linkList = $arrayTemp[0];
    preg_match_all('/(?<=title=\").*?(?=\")/', $result, $arrayTemp);
    $titleList = $arrayTemp[0];
    preg_match_all('/(?<=\[)\d*\-\d*(?=\])/', $result, $arrayTemp);
    $dateList_temp = $arrayTemp[0];
    $dateList = array();
    $linkList = str_replace('Detail.aspx', 'http://jobs.hubu.edu.cn/Detail.aspx', $linkList);
    foreach ($dateList_temp as $key => $value) {
        $dateList[$key] = date('Y').'-'.$value;
    }
    $JobsHubu = array();
            //分别获得网页上的每条通知的标题,链接,时间
    $JobsHubu[0] = $dateList;
    $JobsHubu[1] = $titleList;
    $JobsHubu[2] = $linkList;
    return $JobsHubu;
}
//
function makePage($link)
{

        .......   //省略部分代码
       else if(starts($link,'jobs.hubu'))
      {
        echo "进入makePage函数";
        echo "处理网页".$link.'<br/>';
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL , $link);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $result = curl_exec($curl);
        //echo $result;
        //echo "result结束";
        $result = strip_tags($result);
        $result = stristr($result, ' > 通知公告');
        $result = str_replace(' > 通知公告', '', $result);
        $result = stristr($result, '$(document).ready',true);
        $result = trim($result);
        $result = str_replace("\r\n", '<br/>', $result);
        $result = preg_replace('/(\<br\/\>){1,}/', '<br/>', $result);
        echo $result;
        echo '<br/><br/>';
        echo "退出makePage函数";
        return $result;
       }
}
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先用getJobsHubuNotice()函数获取新闻的链接,标题,日期,然后用makePage()函数获取内容
php通过curl单独抓取网页可以,抓取多个会出错

这是在makePage内部打印链接的结果,链接用浏览器打开没有问题.

回复内容:

使用curl单独抓取http://jobs.hubu.edu.cn/Detail.aspx?ArticleChannelId=81&ArticleId=5722可行,但是如果抓取相同类型的一系列网站就会出错,将他们放在数组
$linkList中,分别是http://jobs.hubu.edu.cn/Detail.aspx?ArticleChannelId=81&ArticleId=5722, http://jobs.hubu.edu.cn/Detail.aspx?ArticleChannelId=81&ArticleId=5325等等。
php通过curl单独抓取网页可以,抓取多个会出错

function getJobsHubuNotice()

{
            
    $curl = curl_init('http://jobs.hubu.edu.cn/List.aspx?ArticleChannelId=81');
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($curl);
            //内容处理
    $result = strip_tags($result,'<a>');
    $result = stristr($result, 'nbsp当前位置:');
    $result = str_replace('nbsp当前位置:', '', $result);
    $result = stristr($result, '当前1/2页',true);
    $result = stristr($result, '通知公告');
    $result = str_replace('通知公告</a>', '', $result);
    preg_match_all('/(?<=href=\").*?(?=\")/', $result, $arrayTemp);
    $linkList = $arrayTemp[0];
    preg_match_all('/(?<=title=\").*?(?=\")/', $result, $arrayTemp);
    $titleList = $arrayTemp[0];
    preg_match_all('/(?<=\[)\d*\-\d*(?=\])/', $result, $arrayTemp);
    $dateList_temp = $arrayTemp[0];
    $dateList = array();
    $linkList = str_replace('Detail.aspx', 'http://jobs.hubu.edu.cn/Detail.aspx', $linkList);
    foreach ($dateList_temp as $key => $value) {
        $dateList[$key] = date('Y').'-'.$value;
    }
    $JobsHubu = array();
            //分别获得网页上的每条通知的标题,链接,时间
    $JobsHubu[0] = $dateList;
    $JobsHubu[1] = $titleList;
    $JobsHubu[2] = $linkList;
    return $JobsHubu;
}
//
function makePage($link)
{

        .......   //省略部分代码
       else if(starts($link,'jobs.hubu'))
      {
        echo "进入makePage函数";
        echo "处理网页".$link.'<br/>';
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL , $link);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $result = curl_exec($curl);
        //echo $result;
        //echo "result结束";
        $result = strip_tags($result);
        $result = stristr($result, ' > 通知公告');
        $result = str_replace(' > 通知公告', '', $result);
        $result = stristr($result, '$(document).ready',true);
        $result = trim($result);
        $result = str_replace("\r\n", '<br/>', $result);
        $result = preg_replace('/(\<br\/\>){1,}/', '<br/>', $result);
        echo $result;
        echo '<br/><br/>';
        echo "退出makePage函数";
        return $result;
       }
}
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先用getJobsHubuNotice()函数获取新闻的链接,标题,日期,然后用makePage()函数获取内容
php通过curl单独抓取网页可以,抓取多个会出错

这是在makePage内部打印链接的结果,链接用浏览器打开没有问题.

你的代码呢???

你的PHP代码并没有出错, 初步怀疑是你请求时传递的 url 不正确, 见下图:

php通过curl单独抓取网页可以,抓取多个会出错

你代码中输出的那个错误, 其实是你获取到的网页上输出的内容.


再次更新,我想我知道你请求出错的原因是什么了:
你从网页中获取到的URL地址为: Detail.aspx?ArticleChannelId=81&ArticleId=2777,

php通过curl单独抓取网页可以,抓取多个会出错

其中中 & 这个字符为 & 的HTML实体符, 在你输出的时候(即你的截图中)它显示的是&, 而当你去真正请求的时候, 是使用的 下面这样的东东:

php通过curl单独抓取网页可以,抓取多个会出错

你只需要把它进行还原或者简单的, 把URL中的 & 替换为 & 然后再去请求就ok了.


再次更新:

<?php
class HttpClient{
    private $ch;

    function __construct($cookie_jar){
        $this->ch = curl_init();
        curl_setopt($this->ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; QQDownload 685; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E)');//UA
        curl_setopt($this->ch, CURLOPT_TIMEOUT, 40);
        curl_setopt($this->ch, CURLOPT_FOLLOWLOCATION, TRUE);
        curl_setopt($this->ch, CURLOPT_AUTOREFERER, true);
        curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($this->ch, CURLOPT_ENCODING, 'UTF-8');
        curl_setopt($this->ch, CURLOPT_COOKIEJAR, $cookie_jar);
        curl_setopt($this->ch, CURLOPT_COOKIEFILE, $cookie_jar);
    }

    function __destruct(){
        curl_close($this->ch);
    }

    final public function setReferer($ref=''){
        if($ref != ''){
            curl_setopt($this->ch, CURLOPT_REFERER, $ref);
        }
    }

    final public function Get($url, $header=false, $nobody=false){
        curl_setopt($this->ch, CURLOPT_POST, false);
        curl_setopt($this->ch, CURLOPT_URL, $url);
        curl_setopt($this->ch, CURLOPT_HEADER, $header);
        curl_setopt($this->ch, CURLOPT_NOBODY, $nobody);
        return curl_exec($this->ch);
    }

    final public function Post($url, $data=array(), $header=false, $nobody=false){
        curl_setopt($this->ch, CURLOPT_URL, $url);
        curl_setopt($this->ch, CURLOPT_HEADER, $header);
        curl_setopt($this->ch, CURLOPT_NOBODY, $nobody);
        curl_setopt($this->ch, CURLOPT_POST, true);
        curl_setopt($this->ch, CURLOPT_POSTFIELDS, http_build_query($data));
        return curl_exec($this->ch);
    }
}


const ROOT_URL = 'http://jobs.hubu.edu.cn/';

$home = 'http://jobs.hubu.edu.cn/List.aspx?ArticleChannelId=81';


$http = new HttpClient('cookie.txt');

//获取列表页
$html = $http->Get($home);

//用正则匹配出来 当前页 所有的 文章
preg_match_all('/<td class="newslist" align="left"><a id=".+?" title="(.+?)" href="(.+?)" target="_self">.+?<\/a>\s+\[(\d+\-\d+)\]/', $html, $links);

array_shift($links);//删除掉第一个

$size = count($links[0]);

for($i=0; $i<$size; $i++){//有匹配到结果
    $title = $links[0][$i];
    $url = htmlspecialchars_decode($links[1][$i]);//还原URL中的 HTML 实体符为原始的字符
    $date = date('Y') . '-' . $links[2][$i];

    echo $date, "\t", $title, "\t", $url, "\n";
    //makePage($url);
}


function makePage($url){
    global $http;//使用全局变量中的那个 HttpClient 实例

    $html = $http->Get(ROOT_URL . $url);//拼接完整的URL

    //$html 就是页面的内容
}
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因为无聊帮你更新一下代码, 上面为我自己根据你之前的代码编写而成, 下图为运行结果(makePage里面加你自己的代码):

php通过curl单独抓取网页可以,抓取多个会出错

makePage($link)
$link有值么,类型对么?

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