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Homephp教程php手册PHP中4种常用的抓取网络数据方法

PHP中4种常用的抓取网络数据方法

   本小节的名称为 fsockopen,curl与file_get_contents,具体是探讨这三种方式进行网络数据输入输出的一些汇总。关于 fsockopen 前面已经谈了不少,下面开始转入其它。这里先简单罗列一下一些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:

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$url = 'http://localhost/test2.php';

$html = file_get_contents($url);

echo $html;

  2. 用fopen打开url,以get方式获取内容

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$url = 'http://localhost/test2.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

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$data = array(

'foo'=>'bar',

'baz'=>'boom',

'site'=>'www.jb51.net',

'name'=>'nowa magic');

 

$data = http_build_query($data);

 

//$postdata = http_build_query($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://localhost/test2.php";

$context = stream_context_create($options);

$result = file_get_contents($url, false, $context);

 

echo $result;

  4、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

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$url = 'http://localhost/test2.php?site=jb51.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;

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