PHP 通过file_put_contents如何获取远程关键字，这段代码改怎么修改

Question

这段代码中如何修改，才可以获取http://top.taobao.com/level3.php?cat=16&level3=&show=focus&up=false&ad_id=&am_id=&cm_id=&pm_id=中的关键字呀$lastflesh=@filemtime($dir."/Cache_TodayHot.html");
if(!file_exists($dir."/Cache_TodayHot.html") or ($lastflesh + ($flush * 60 * 60) <= $timestamp)){  //$flush * 60  一小时
 $openurl="http://top.baidu.com/buzz/shechi.html";
 $file = curl($openurl);
 //开始处理一条一条的条数！！！
 $result='';
 if (preg_match_all('/<td class="key"><a href="http:\/\/www\.baidu\.com\/baidu\?.+?" target="_blank">(.+?)<\/a><\/td>/is', $file, $list))
 {
  foreach ($list[1] as $i=>$k1){   $result=$result . '<a href="/liebiao.php?q='.urlencode($k1).'&catid=0" target="_blank">'.$k1.'</a>';
  }
 }
 $result_utf=iconv("GB2312","UTF-8",$result);
 file_put_contents($dir."/Cache_TodayHot.html",$result_utf);}
else
{}

Answer 1

取meta不需要使用正则php提供了函数的。get_meta_tags --  从一个文件中提取所有的 meta 标签 content 属性，返回一个数组 array get_meta_tags ( string filename [, int use_include_path] )
打开 filename 逐行解析文件中的 <meta> 标签。此参数可以是本地文件也可以是一个 URL。解析工作将在 </head> 处停止。 

Answer 2

$url = 'http://top.taobao.com/level3.php?cat=16&level3=&show=focus&up=false&ad_id=&am_id=&cm_id=&pm_id=';
$s = file_get_contents($url);
preg_match_all('/<span\s*class="title">[\s\n\r]*?<map[^>]*?>.*?<\/map>[\s\n\r]*?<a\s*href=[^>](.*?)>(.*?)<\/a>/is',$s,$match);
print_r($match);
?>
Array
(
    
    [1] => Array
        (
            [0] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%D3%F0%C8%DE%B7%FE&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [1] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C3%AB%D2%C2&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [2] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%CD%E2%CC%D7&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [3] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C3%DE%B7%FE&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [4] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%BA%AB%B0%E6+%CD%E2%CC%D7&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [5] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B6%B7%C5%F1&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [6] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C1%AC%D2%C2%C8%B9&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [7] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C6%A4%B2%DD&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [8] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%CE%C0%D2%C2&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [9] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%D3%F0%C8%DE%B7%FE+%D5%FD%C6%B7&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [10] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C5%A3%D7%D0%BF%E3&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [11] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C6%A4%B2%DD+%CD%E2%CC%D7+%D0%C2%BF%EE&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [12] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B3%A4%BF%EE+%C3%AB%D2%C2&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [13] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B0%AC%C0%B3%D2%C0%D3%F0%C8%DE%B7%FE2010&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [14] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%CD%E2%CC%D7+%C5%AE+%C7%EF%B6%AC+%BA%AB%B0%E6&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [15] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C2%ED%BC%D7&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [16] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B0%AC%C0%B3%D2%C0%D3%F0%C8%DE%B7%FE%D5%FD%C6%B7&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [17] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B4%F3%D2%C2&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [18] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C3%AB%D2%C2+%B3%A4%BF%EE+%BA%AB%B0%E6&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [19] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B0%A2%D2%C0%C1%AB&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [20] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C6%A4%D2%C2&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [21] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=2011+%B6%AC+%D0%C2+%CD%E2%CC%D7+%BA%AB&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [22] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B2%A8%CB%BE%B5%C7+%D3%F0%C8%DE%B7%FE+%C5%AE&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [23] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C3%AB%D2%C2+%BA%AB%B0%E6&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [24] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B4%F2%B5%D7%BF%E3+%BC%D3%BA%F1&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [25] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C3%C0%CC%D8%CB%B9%B0%EE%CD%FE%D3%F0%C8%DE%B7%FE&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [26] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%BA%AB%B9%FA%B4%FA%B9%BA&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [27] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%BB%E9%C9%B4&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [28] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%C7%E9%C2%C2%D7%B0&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
            [29] => http://ju.atpanel.com/?url=http://s.taobao.com/search?source=top_search&q=%B0%AC%B8%F1+2010+%B6%AC%BF%EE%D5%FD%C6%B7&style=grid&tab=coefp&cat=16&ad_id=&am_id=&cm_id=&pm_id=1500223547e594398041
        )    [2] => Array
        (
            [0] => 羽绒服
            [1] => 毛衣
            [2] => 外套
            [3] => 棉服
            [4] => 韩版 外套
            [5] => 斗篷
            [6] => 连衣裙
            [7] => 皮草
            [8] => 卫衣
            [9] => 羽绒服 正品
            [10] => 牛仔裤
            [11] => 皮草 外套 新款
            [12] => 长款 毛衣
            [13] => 艾莱依羽绒服2010
            [14] => 外套 女 秋冬 韩版
            [15] => 马甲
            [16] => 艾莱依羽绒服正品
            [17] => 大衣
            [18] => 毛衣 长款 韩版
            [19] => 阿依莲
            [20] => 皮衣
            [21] => 2011 冬 新 外套 韩
            [22] => 波司登 羽绒服 女
            [23] => 毛衣 韩版
            [24] => 打底裤 加厚
            [25] => 美特斯邦威羽绒服
            [26] => 韩国代购
            [27] => 婚纱
            [28] => 情侣装
            [29] => 艾格 2010 冬款正品
        ))