PHP笔记网

<?php
// 1. 初始化
$ch = curl_init();

// 2. 设置选项，包括URL
curl_setopt($ch, CURLOPT_URL, "http://blog.snsgou.com");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);

// 3. 执行并获取HTML文档内容
$output = curl_exec($ch);

// 4. 释放curl句柄
curl_close($ch);
?>

curl_setopt中的 CURLOPT_URL, CURLOPT_RETURNTRANSFER 等参数，请参考php文档手册,里面有详细说明！
现在得到$output内容…使用正则表达式匹配出你需要的内容。

<?php
/**
 * 采集类
 */
class Gather {

	public $pagestring = '';
	private $db;

	function __construct() {
		global $db;
		$this->db = $db;
	}

	function getUrlFile($url) {
		$url = trim($url);
		$content = '';
		if (extension_loaded('curl')) {
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_URL, $url);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
			curl_setopt($ch, CURLOPT_HEADER, 0);
			$content = curl_exec($ch);
			curl_close($ch);
		} else {
			$content = file_get_contents($url);
		}
		return trim($content);
	}

	function get_all_url($code) {
		preg_match_all('/<a.+?href=["|\']?([^>"\' ]+)["|\']?\s*[^>]*>([^>]+)<\/a>/is', $code, $arr);
		return array('name' => $arr[2], 'url' => $arr[1]);
	}

	function get_sub_content($str, $start, $end) {
		$start = trim($start);
		$end = trim($end);
		if ($start == '' || $end == '') {
			return $str;
		}
		$str = explode($start, $str);
		$str = explode($end, $str[1]);
		return $str[0];
	}

	function vd($var) {
		echo "<div style=\"border:1px solid #ddd;background:#F7F7F7;padding:5px 10px;\">\r\n";
		echo "<pre style=\"font-family:Arial,Vrinda;font-size:14px;\">\r\n";
		var_dump($var);
		echo "\r\n</pre>\r\n";
		echo "</div>";
	}

}

?>

<?php
define('ROOT_PATH', str_replace('\\', '/', dirname(__FILE__)));
//include ROOT_PATH."/Gather.class.php";
set_time_limit(0);
header("Content-type: text/html; charset=gb2312");
//目标网址
$url = 'http://news.163.com/special/00013C0O/guojibjtj_03.html';
//实例化采集机器
$gather = new Gather();
//获取目标网址HTML
$html = $gather->getUrlFile($url);
//定义采集列表区间
$start = '<div class="bd clearfix">';
$end = '<div class="pages-1 mt25">';
//获取区间内的文章URL和TITLE
$code = $gather->get_sub_content($html, $start, $end);
$newsAry = $gather->get_all_url($code);
//打印出结果
$gather->vd($newsAry);

$tarGetUrl = $newsAry['url'][0];
//获取目标网址HTML
$html = $gather->getUrlFile($tarGetUrl);
//定义采集列表区间
$start = '<div id="endText">';
$end = '<span class="cDGray right" style="white-space:nowrap;">';
//获取区间内的文章URL和TITLE
$code = $gather->get_sub_content($html, $start, $end);
$killHtml = '<iframe src="http://g.163.com/r?site=netease&affiliate=news&cat=article&type=tvscreen200x300&location=1" width="200" height="300" frameborder="no" border="0" marginwidth="0" marginheight="0" scrolling="no"></iframe>';
$killHtml2 = '<a href="http://news.163.com/"><img src="http://img1.cache.netease.com/cnews/img07/end_i.gif" alt="netease" width="12" height="11" border="0" class="icon" /></a>';
$code = str_replace($killHtml, "", $code);
$code = str_replace($killHtml2, "", $code);
$gather->vd($code);
?>