php 采集函数，很好的php采集函数

<?php
header("content-Type: text/html; charset=utf-8");
function preg_substr($start, $end, $str) // 正则截取函数
{
$temp = preg_split($start, $str);
$content = preg_split($end, $temp[1]);
return $content[0];
}
function str_substr($start, $end, $str) // 字符串截取函数
{
$temp = explode($start, $str, 2);
$content = explode($end, $temp[1], 2);
return $content[0];
}

// ---------------- 使用实例 ----------------
$str = iconv("GB2312","UTF-8",  file_get_contents("http://www.037c.com/New/5.html"));
echo ('标题: ' . str_substr("<title>", "</title>", $str)); // 通过字符串提取标题
echo ('作者: ' . preg_substr("/作者：/", "/<\//", $str)); // 通过正则提取作者
echo ('内容: ' . str_substr('<div class="wltg">', '</div>', $str)); //内容当然不可以少
?>

<?php
header("content-Type: text/html; charset=utf-8");
$html=file_get_contents("http://news.sina.com.cn/");
$html=str_replace("\n","",$html);
$html=str_replace("\r","",$html);
$rule='/<div class="ct_t_01".*?>(.*?)<\/div>/';
preg_match($rule,$html,$result);
$result=$result[1];
$rule1='/<h1 data-client="headline">(.*?)<\/h1>/';
preg_match_all($rule1,$result,$array);
print_r($array);

?>

<?php
header("content-Type: text/html; charset=utf-8");
$html=file_get_contents("http://news.sina.com.cn/");
function preg_substr($start, $end, $str) // 正则截取函数
{
$temp = preg_split($start, $str);
$content = preg_split($end, $temp[1]);
return $content[0];
}
$result=preg_substr('/<div class="ct_t_01".*?>/','/<\/div>/',$html);
$rule1='/<h1 data-client="headline">(.*?)<\/h1>/';
preg_match_all($rule1,$result,$array);
print_r($array)
?>