php同时提取多条新闻中的文本一例

本文为一个提取一批新闻网页中的文本的小程序，它可以将各篇新闻的内容存为以该新闻标题为文件名的文本文件。如有更好的处理方法，请和我联系：
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[email protected]
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这里以人民网中的“今日要闻”下的新闻为例.
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<?php
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($url) ? "" : $url = "http://www.unn.com.cn/GB/channel2/3/11/index.html"; // 今日要闻
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if(isset($url)&&$url!="") {
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$str = implode("",file($url));
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$str_ary = explode("<ul>",$str);
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$str_ary = explode("<li>",trim($str_ary[1]));
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for ($i=0; $i<8; $i++) {
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if (strlen(trim($str_ary[$i]))<3){
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continue;
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}
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echo "新闻".$i."：".$str_ary[$i];
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$str1=strstr("$str_ary[$i]",'<a href="/');
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$str2=strstr("$str_ary[$i]",'" target');
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$len1=strlen("$str1");
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$len2=strlen("$str2");
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$len=$len1-$len2;
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$url=substr("$str1",10,$len-10);
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if (strlen(trim($url))!=0) {
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$url = "http://www.unn.com.cn/".$url;
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define(CONTENTS_DIR,"./contents/");
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if(isset($url)&&$url!="") {
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$str = implode("",file($url));
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$str1=explode('<div align="right">',$str); //去掉文件没用的上半部分
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$str2 = explode('<h4 align="center">&nbsp; </h4>',$str1[1]);
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//取出文件的下半部分，并去掉没用的下半部分，这时得到的都是有用的
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$str3=explode('</font><font size="+2"><b><font size="3">',$str2[0]); //从整个有用部分取出文件标题和正文
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$str4=explode('</div>',$str2[0]); //取出日期和时间
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$str5=explode('</font></b></font><font size="2">',$str3[1]); //从标题和正文部分取出标题
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$title=str_replace("<br>","",$str5[0]);
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$str3=explode('<p><font size="2">',$str2[0]); //从整个有用部分取出文件正文
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$str3[1]=str_replace('<br><br>&nbsp;&nbsp;&nbsp;&nbsp;',"n"."　　",$str3[1]);
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$str3[1]=str_replace('&nbsp;',"",$str3[1]);
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$str3=strip_tags($str3[1]);
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$pf=trim($title).".txt";
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$ppf=fopen(CONTENTS_DIR."$pf",'w');
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fputs($ppf,$title);
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fputs($ppf,"$str4[0]");
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fputs($ppf,$str3);
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}
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}
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}
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}
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?>
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