PHP网络数据抓取方法

最新推荐文章于 2025-12-12 05:59:18 发布

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本文介绍了六种常用网络数据抓取方法，包括使用file_get_contents()、fopen()、fsockopen()及curl库等技术手段，以GET或POST方式获取网页内容。

常见的抓取网络数据的一些方法。

1. 用 file_get_contents() 以 get 方式获取内容：

$url  = 'http://www.nowamagic.net/php/sock.php';
$html = file_get_contents($url);
echo $html;

2. 用fopen()打开url，以get方式获取内容：

$url = 'http://www.nowamagic.net/php/sock.php';
$fp  = fopen($url, 'r');
stream_get_meta_data($fp);
$result = '';
while(!feof($fp))
{
    $result .= fgets($fp, 1024);
}
echo "url body: $result";
fclose($fp);

3. 用file_get_contents函数,以post方式获取url

$data = array(
    'foo'  => 'bar',
    'baz'  => 'boom',
    'site' => 'www.nowamagic.net',
    'name' => 'nowa magic'
);
$data = http_build_query($data);
$options = array(
    'http' => array(
        'method'  => 'POST',
        'header'  => 'Content-type:application/x-www-form-urlencoded',
        'content' => $data
        'timeout' => 60 *60 // 超时时间（单位:s）
    )
);
$url     = "http://www.nowamagic.net/test2.php";
$context = stream_context_create($options);
$result  = file_get_contents($url, false, $context);
echo $result;

4. 用 fsockopen 函数打开url，以get方式获取完整的数据，包括header和body

$url = 'http://www.nowamagic.net:80/php/sock.php?site=nowamagic.net';
function get_url($url,$cookie=false)
{
    $url   = parse_url($url);
    $query = $url['path']."?".$url['query'];
    echo"Query:".$query;
    $fp = fsockopen($url['host'], $url['port']?$url['port']:80 , $errno, $errstr, 30);
    if(!$fp)
    {
        return false;
    }
    else {
        $request = "GET$query HTTP/1.1\r\n";
        $request .= "Host:$url[host]\r\n";
        $request .="Connection: Close\r\n";
        if($cookie)$request.="Cookie:  $cookie\n";
        $request.="\r\n";
        fwrite($fp,$request);
        $result = '';
        while(!feof($fp))
        {
            $result .=@fgets($fp, 1024);
        }
        fclose($fp);
        return $result;
    }
}
//获取url的html部分，去掉header
function GetUrlHTML($url,$cookie=false)
{
    $rowdata = get_url($url,$cookie);
    if($rowdata)
    {
        $body=stristr($rowdata,"\r\n\r\n");
        $body=substr($body,4,strlen($body));
        return $body;
    }
    return false;
}
echo get_url($url);
echo GetUrlHTML($url);<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);"> </span>

5. 用fsockopen函数打开url，以POST方式获取完整的数据，包括header和body

$url = 'http://www.nowamagic.net:80/php/sock.php?site=nowamagic.net';
function HTTP_Post($URL,$data,$cookie, $referer="")
{
    $URL_Info=parse_url($URL);
    if($referer==""){//if not given use this script as referrer
       $referer="www.nowamagic.net";
    }
    foreach($data as $key=>$value){
        $values[] = "$key=".urlencode($value);
    }
    $data_string=implode("&",$values);
    if(!isset($URL_Info["port"])){
        $URL_Info["port"]=80;
    }
    $request = '';
    $request.="POST".$URL_Info["path"]." HTTP/1.1\n";
    $request.="Host:".$URL_Info["host"]."\n";
    $request.="Referer:$referer\n";
    $request.="Content-type:application/x-www-form-urlencoded\n";
    $request.="Content-length:".strlen($data_string)."\n";
    $request.="Connection:close\n";
    $request.="Cookie:   $cookie\n";
    $request.="\n";
    $request.=$data_string."\n";
    $fp = fsockopen($URL_Info["host"],$URL_Info["port"]);
    fputs($fp, $request);
    $result = '';
    while(!feof($fp))
    {
        $result .= fgets($fp,1024);
    }
    fclose($fp);
    return $result;
}

$data = array(
    'foo'  => 'bar',
    'baz'  => 'boom',
    'site' => 'www.nowamagic.net',
    'name' => 'nowa magic'
);
$cookie  = '';
$referer = 'http://www.nowamagic.net/';
echo HTTP_Post($url, $data, $cookie, $referer);

6. 使用curl库，使用curl库之前，可能需要查看一下php.ini是否已经打开了curl扩展。

$url     = 'http://www.nowamagic.net:80/php/sock.php?site=nowamagic.net';
$ch      = curl_init();
$timeout = 5;
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;