使用php curl函数时提示Warning: curl_setopt() [function.curl-setopt]: CURLO…错误该怎么解决

如果当你在PHP中运行 CURLOPT_FOLLOWLOCATION 然后得到php提示错误信息为:
Warning: curl_setopt() [function.curl-setopt]: CURLOPT_FOLLOWLOCATION cannot be activated when in safe_mode or an open_basedir is set…

错误中提到两个关键safe_mode和 open_basedir,如果你是虚拟主机的没有设置APPCHE的权限是不能通过修改服务器配置来解决问题的,一般来说,服务器配置safe_mode都为off,然后为了一些安全对用户有一些限制,通过设置open_basedir来限制虚拟主机用户的PHP执行文件夹,因此当你使用CURLOPT_FOLLOWLOCATION (php curl函数,深层抓取数据)的时候,一旦有301转向等就会出现文中提到的错误信息.

在查了相关资料后,很快找到了解决办法,http://www.php.cn/php-weizijiaocheng-362563.html,这些方法都在php官方帮助里有.

具体做法是在curl语句用不使用curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true),在php函数中自定义一个函数,

代码如下：

function curl_redir_exec($ch,$debug="")
{
static $curl_loops = 0;
static $curl_max_loops = 20;
if ($curl_loops++ >= $curl_max_loops)
{
$curl_loops = 0;
return FALSE;
}
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = curl_exec($ch);
$debbbb = $data;
list($header, $data) = explode("＼n＼n", $data, 2);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if ($http_code == 301 || $http_code == 302) {
$matches = array();
preg_match('/Location:(.*?)＼n/', $header, $matches);
$url = @parse_url(trim(array_pop($matches)));
//print_r($url);
if (!$url)
{
//couldn't process the url to redirect to
$curl_loops = 0;
return $data;
}
$last_url = parse_url(curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));
/*    if (!$url['scheme'])
$url['scheme'] = $last_url['scheme'];
if (!$url['host'])
$url['host'] = $last_url['host'];
if (!$url['path'])
$url['path'] = $last_url['path'];*/
$new_url = $url['scheme'] . '://' . $url['host'] . $url['path'] . ($url['query']?'?'.$url['query']:'');
curl_setopt($ch, CURLOPT_URL, $new_url);
//    debug('Redirecting to', $new_url);
return curl_redir_exec($ch);
} else {
$curl_loops=0;
return $debbbb;
}
}

函数定义好后,curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true)这条语句替换为curl_redir_exec($ch)

这样以后,我想你的PHP文件应该不会提示错误了,关于这段代码,在提供PHP官方连接用可以找到.

php官方的代码如下

/safe 模式不能curl的函数  
  
    function curl_redir_exec($ch)  
    {  
        static $curl_loops = 0;  
        static $curl_max_loops = 20;  
        if ($curl_loops++ >= $curl_max_loops)  
        {  
            $curl_loops = 0;  
            return FALSE;  
        }  
        curl_setopt($ch, CURLOPT_HEADER, true);  
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  
        $data = curl_exec($ch);  
        list($header, $data) = explode("\n\n", $data, 2);  
        $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);  
        if ($http_code == 301 || $http_code == 302)  
        {  
            $matches = array();  
            preg_match('/Location:(.*?)\n/', $header, $matches);  
            $url = @parse_url(trim(array_pop($matches)));  
            if (!$url)  
            {  
                //couldn't process the url to redirect to  
                $curl_loops = 0;  
                return $data;  
            }  
            $last_url = parse_url(curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));  
            if (!$url['scheme'])  
                $url['scheme'] = $last_url['scheme'];  
            if (!$url['host'])  
                $url['host'] = $last_url['host'];  
            if (!$url['path'])  
                $url['path'] = $last_url['path'];  
            $new_url = $url['scheme'] . '://' . $url['host'] . $url['path'] . ($url['query']?'?'.$url['query']:'');  
            curl_setopt($ch, CURLOPT_URL, $new_url);  
            debug('Redirecting to', $new_url);  
            return curl_redir_exec($ch);  
        } else {  
            $curl_loops=0;  
            return $data;  
        }  
    }  
//end

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