致命错误：在 (curl & htmldomparser) 中的字符串上调用成员函数 find()答案

【问题标题】：Fatal error: Call to a member function find() on string in (curl & htmldomparser)致命错误：在 (curl & htmldomparser) 中的字符串上调用成员函数 find()
【发布时间】：2017-03-16 16:01:00
【问题描述】：

我想获取 html 代码并从网站上查找，我正在使用此代码执行此操作但出现错误

《curl和htmldomparser的同时使用》

致命错误：在第 46 行的 C:\cod.php 中的字符串上调用成员函数 find()

线路错误：

  foreach ($content->find('div[class=postbody]') as $element)

我能够使用登录获得完整的源代码但问题是：

   foreach ($content->find('div[class=postbody]') as $element)

这条鳕鱼：

  include_once('/simple_html_dom.php');

  error_reporting(E_ALL);


  function vBulletinLogin($username,$password,$url,$posturl){
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_HEADER,false);
    curl_setopt($ch, CURLOPT_COOKIEFILE, 'veri.txt'); 
    curl_setopt($ch, CURLOPT_COOKIEJAR, 'veri.txt'); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
    curl_setopt($ch, CURLOPT_COOKIESESSION,true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
    curl_setopt($ch, CURLOPT_USERAGENT,$_SERVER['HTTP_USER_AGENT']);
    curl_setopt($ch, CURLOPT_REFERER, $url.'index.php');
    curl_setopt($ch, CURLOPT_URL, $url.'login.php?do=login'); 
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, "vb_login_username=$username&vb_login_password&s=&securitytoken=guest&do=login&vb_login_md5password=".md5($password)."&vb_login_md5password_utf=".md5($password));
    $exec = curl_exec($ch);

    curl_setopt($ch, CURLOPT_POST, 0);
    curl_setopt($ch, CURLOPT_REFERER, $url.'login.php?do=login'); 
    curl_setopt($ch, CURLOPT_URL, $url.'clientscript/vbulletin_global.js?v=373'); 
    $exec = curl_exec($ch);

    curl_setopt($ch, CURLOPT_REFERER, $url.'login.php?do=login');
    curl_setopt($ch, CURLOPT_URL, $url.'index.php'); 
    $exec = curl_exec($ch);

    curl_setopt($ch, CURLOPT_REFERER, $url.'index.php');
    curl_setopt($ch, CURLOPT_URL, $posturl); 
    $exec = curl_exec($ch);
    curl_close($ch);
    return $exec;



}

$content = vBulletinLogin('user','pass','url','url');
foreach ($content->find('div[class=postbody]') as $element)
    {

        echo $element;

    }

【问题讨论】：

$content 是一个 string 而find 方法显然需要别的东西。您是否尝试过阅读手册？
不，我不需要手动。/我如何从“查找”中使用。/或如何转换 $content
这就是手册的用途。请阅读simplehtmldom.sourceforge.net/manual.htm#section_create
这个怎么样：return str_get_html($exec);
我使用 [str_get_html] 和 [file_get_html] 但输出为空

标签： php curl web

【解决方案1】：

这段代码没问题

 function vBulletinLogin($username,$password,$url,$posturl){
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_HEADER,false);
curl_setopt($ch, CURLOPT_COOKIEFILE, 'veri.txt'); 
curl_setopt($ch, CURLOPT_COOKIEJAR, 'veri.txt'); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch, CURLOPT_COOKIESESSION,true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_USERAGENT,$_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_REFERER, $url.'index.php');
curl_setopt($ch, CURLOPT_URL, $url.'login.php?do=login'); 
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "vb_login_username=$username&vb_login_password&s=&securitytoken=guest&do=login&vb_login_md5password=".md5($password)."&vb_login_md5password_utf=".md5($password));
$exec = curl_exec($ch);

curl_setopt($ch, CURLOPT_POST, 0);
curl_setopt($ch, CURLOPT_REFERER, $url.'login.php?do=login'); 
curl_setopt($ch, CURLOPT_URL, $url.'clientscript/vbulletin_global.js?v=373'); 
$exec = curl_exec($ch);

curl_setopt($ch, CURLOPT_REFERER, $url.'login.php?do=login');
curl_setopt($ch, CURLOPT_URL, $url.'index.php'); 
$exec = curl_exec($ch);

curl_setopt($ch, CURLOPT_REFERER, $url.'index.php');
curl_setopt($ch, CURLOPT_URL, $posturl); 
$exec = curl_exec($ch);
curl_close($ch);
return $exec;}


$content = vBulletinLogin('user','pass','url','url');

但是在使用了这段代码之后

  foreach ($content->find('div[class=postbody]') as $element)
{

    echo $element;

}

我得到错误 这是个大问题，密不可分 帮帮我

【讨论】：