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PHP中4种常用的抓取网络数据方法,php4种抓取数据

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WBOYOriginal
2016-06-13 09:02:25982browse

PHP中4种常用的抓取网络数据方法,php4种抓取数据

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:

$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

$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

$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

$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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