PHP获取网页所有连接的方法(附demo源码下载)

2024-05-04 23:44:46

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这篇文章主要介绍了PHP获取网页所有连接的方法,涉及PHP基于curl针对网页的操作技巧,并带附demo源码供读者下载参考,需要的朋友可以参考下

本文实例讲述了PHP获取网页所有连接的方法。分享给大家供大家参考，具体如下：

function getHtml($url, $charset='utf-8')

{

  $curl = curl_init();

  //curl_setopt($curl, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:192.168.168.1', 'CLIENT-IP:192.168.168.1'));//IP

  curl_setopt($curl, CURLOPT_URL, $url);

  curl_setopt($curl, CURLOPT_REFERER, "");  //来路

  $user_agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.43 Safari/537.31';

  curl_setopt($curl, CURLOPT_USERAGENT, $user_agent);

  // 只需返回HTTP header

  // curl_setopt($curl, CURLOPT_HEADER, 1);

  // 页面内容我们并不需要

  // curl_setopt($curl, CURLOPT_NOBODY, 1);

  // 返回结果，而不是输出它

  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

  $html = curl_exec($curl);

  //$info = curl_getinfo($curl);

  //echo var_dump($info);

  if ($html === false) {

    //echo "cURL Error: " . curl_error($ch);

    return '';

  }

  curl_close($curl);

  if ($charset != 'utf-8')

  {

    $html = iconv($charset, "UTF-8", $html);

  }

  return $html;

}

header("Content-type: text/html; charset=utf-8");

include('simple_html_dom.php');

// 要打开 extension=php_mbstring.dll

//$url = 'http://www.baidu.com/s?wd=kaka';

$url = 'http://www.163.com/';

$str_html = getHtml($url, 'gbk');

$html = str_get_html($str_html);

$links = $html->find('a');

foreach($links as $link)

{

  $txt = trim($link->plaintext);

  echo $link->href . '[' . $txt . ']<br>';

}

$html = null;