php通过正则提取页面指定内容实例

作者:袖梨 2022-06-25

例子代码如下,可常用于采集哦、

 代码如下 复制代码


1、获取页面标题

//提取标题
            preg_match('/(?<title>.*?)<\/title>/i', $html, $titleArr);<br />             $title = $titleArr['title'];<br /> 2、获取body主体内容,并将背景图片提取出来替换成其他图片地址</p> <p>/**<br />  * 获取BODY主体区域内容<br />  * @param $html<br />  * @param $urlRoot<br />  * @return mixed<br />  */<br /> function getBody($html,$urlRoot = null){<br />     //提取BODY主体<br />     preg_match('/<!--body-->(.*?)<!--body-->/is ', $html, $bodyArr);<br />     if(!$bodyArr){<br />         preg_match('/<body.*?>(.*?)<\/body>/is ', $html, $bodyArr);<br />     }<br />     $body = $bodyArr[1];<br />     //替换img文件<br />     $body =  preg_replace('/(<[img|IMG].*src=[\'|"])(\.\.\/)*(img.[^\'||^"]+)/',"$1$urlRoot$3",$body);<br />     //替换html文件内的css背景图片<br />     $body =  preg_replace('~\b(background(-image)?\s*:(.*?)\(\s*[\'|"]?)(\.\.\/)*(img.*?)?\s*\)~i',"$1$urlRoot$5)",$body);<br />     return $body;<br /> }<br /> 3、提取页面Description内容</p> <p>function getDescription($html){<br />     // Get the 'content' attribute value in a <meta name="description" ... /><br />     $matches = array();<br />  <br />     // Search for <meta name="description" content="Buy my stuff" /><br />     preg_match('/<meta.*?name=("|\')description("|\').*?content=("|\')(.*?)("|\')/i', $html, $matches);<br />     if (count($matches) > 4) {<br />         return trim($matches[4]);<br />     }<br />  <br />     // Order of attributes could be swapped around: <meta content="Buy my stuff" name="description" /><br />     preg_match('/<meta.*?content=("|\')(.*?)("|\').*?name=("|\')description("|\')/i', $html, $matches);<br />     if (count($matches) > 2) {<br />         return trim($matches[2]);<br />     }<br />  <br />     // No match<br />     return null;<br /> }<br /> 4、替换css文件的背景图片地址</p> <p>/**<br />  * 获取CSS内容<br />  * @param $cssCnt<br />  * @param $urlRoot<br />  * @return mixed<br />  */<br /> function getCss($cssCnt,$urlRoot =null){<br />     //匹配包含 img文件夹的相对路径图片 (含义绝对路径的不包含在其中)<br />     //匹配替换不一定准确,因为只是将 含义 ../ 的地址转为url 而没有考虑 ../../ 之类的层级关系<br />     $css =  preg_replace('~\b(background(-image)?\s*:(.*?)\(\s*[\'|"]?)(\.\.\/)*(img.*?)?\s*\)~i',"$1$urlRoot$5)",$cssCnt);<br />     //添加css前缀<br />     $css =  preg_replace('/\b.(.*?)[,|{]/',"pat .$0",$cssCnt);<br />     //TODO 压缩css<br />     return $css;<br /> }</p> <p><br />  </p> </td> </tr> </table> <p>从上面例子来看其实都是非常的简单就是批有规律的标签为开始与结束节点,这样我们可以获取这两个字符之类的内容也就是我们要提取的内容了哦,只是在中间有字符或空格的一些处理了哦。</p></td> </tr> </table> </div> </div> </section> <section class="wrap-box"> <div class="g-tit"> <h2>相关文章</h2> </div> <ul class="s-list nobord notop"> <li> <a href="/art-492403.htm" class="s-card"> <div class="s-card-l"> <p class="tit">艾尔登法环黑夜君临女爵怎么获得 如何解锁女爵角色</p> <div class="info"> <span class="person">游戏攻略</span> <span class="time">2025-12-23</span> </div> </div> <div class="s-card-pic"> <img src="/images/lazy.gif" data-src="/uploads/20251222/logo_69489e6af0cec1.jpg" alt="艾尔登法环黑夜君临女爵怎么获得 如何解锁女爵角色" /> </div> </a> </li> <li> <a href="/art-493053.htm" class="s-card"> <div class="s-card-l"> <p class="tit">像素火影网页版在线畅玩入口-像素火影唤境新版官网地址</p> <div class="info"> <span class="person">游戏攻略</span> <span class="time">2025-12-23</span> </div> </div> <div class="s-card-pic"> <img src="/images/lazy.gif" data-src="/uploads/20251222/logo_6949327fdf90b1.jpg" alt="像素火影网页版在线畅玩入口-像素火影唤境新版官网地址" /> </div> </a> </li> <li> <a href="/art-492404.htm" class="s-card"> <div class="s-card-l"> <p class="tit">艾尔登法环黑夜君临七仙女击杀攻略 DLC全新BOSS七仙女怎么打</p> <div class="info"> <span class="person">游戏攻略</span> <span class="time">2025-12-23</span> </div> </div> <div class="s-card-pic"> <img src="/images/lazy.gif" data-src="/uploads/20251222/logo_69489e6bd95411.jpg" alt="艾尔登法环黑夜君临七仙女击杀攻略 DLC全新BOSS七仙女怎么打" /> </div> </a> </li> <li> <a href="/art-490578.htm" class="s-card"> <div class="s-card-l"> <p class="tit">patreon漫画最新入口-patreon漫画官方正版入口</p> <div class="info"> <span class="person">游戏攻略</span> <span class="time">2025-12-23</span> </div> </div> <div class="s-card-pic"> <img src="/images/lazy.gif" data-src="/uploads/20251218/logo_6943e0a9ac1041.jpg" alt="patreon漫画最新入口-patreon漫画官方正版入口" /> </div> </a> </li> <li> <a href="/art-492405.htm" class="s-card"> <div class="s-card-l"> <p class="tit">九牧之野t0阵容搭配推荐 t0阵容搭配攻略介绍</p> <div class="info"> <span class="person">游戏攻略</span> <span class="time">2025-12-23</span> </div> </div> <div class="s-card-pic"> <img src="/images/lazy.gif" data-src="/uploads/20251222/logo_69489e6c3c4531.png" alt="九牧之野t0阵容搭配推荐 t0阵容搭配攻略介绍" /> </div> </a> </li> <li> <a href="/art-487189.htm" class="s-card"> <div class="s-card-l"> <p class="tit">死神BLEACH手游官网入口-死神BLEACH手游主页一键直达</p> <div class="info"> <span class="person">游戏攻略</span> <span class="time">2025-12-23</span> </div> </div> <div class="s-card-pic"> <img src="/images/lazy.gif" data-src="/uploads/20251209/logo_693808d5948961.jpg" alt="死神BLEACH手游官网入口-死神BLEACH手游主页一键直达" /> </div> </a> </li> </ul> </section> <section class="wrap-box"> <div class="g-tit"> <h2>精彩推荐</h2> </div> <ul class="card-box"> <li class="card3"> <a href="/app/146205.htm" target="_self" class="figure"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489a9d5e29a1.png" alt="饥荒海难诺亚中文版" /> </div> <p class="figure-head">饥荒海难诺亚中文版</p> <span class="figure-btn">下载</span> </a> </li> <li class="card3"> <a href="/app/146206.htm" target="_self" class="figure"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489a9ee6fb91.png" alt="后室在线版10人联机版" /> </div> <p class="figure-head">后室在线版10人联机版</p> <span class="figure-btn">下载</span> </a> </li> <li class="card3"> <a href="/app/146207.htm" target="_self" class="figure"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489aa1433541.png" alt="左右滑滑九游版" /> </div> <p class="figure-head">左右滑滑九游版</p> <span class="figure-btn">下载</span> </a> </li> <li class="card3"> <a href="/app/146208.htm" target="_self" class="figure"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489aa39e9cf1.png" alt="果盘骑士联萌客户端" /> </div> <p class="figure-head">果盘骑士联萌客户端</p> <span class="figure-btn">下载</span> </a> </li> </ul> <ul class="card-box-b"> <li class="card10"> <a href="/app/146185.htm" target="_self" class="figure2"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489a4b15b581.png" alt="摩托车销售模拟器内置菜单中文版" /> </div> <div class="figure-cont"> <p class="figure-head">摩托车销售模拟器内置菜单中文版</p> <div class="figure-desc"> <span>模拟经营</span> <span>摩托车销售模拟器内置菜单中文版</span> </div> <div class="figure-desc"> <p>摩托车出售模拟器,又名摩托车销售模拟器,这是一个以摩托车销售</p> </div> </div> <span class="figure-btn">下载</span> </a> </li> <li class="card10"> <a href="/app/146186.htm" target="_self" class="figure2"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489a4e1eec91.png" alt="船舶模拟2020最新版" /> </div> <div class="figure-cont"> <p class="figure-head">船舶模拟2020最新版</p> <div class="figure-desc"> <span>模拟经营</span> <span>船舶模拟2020最新版</span> </div> <div class="figure-desc"> <p>船舶模拟2020是玩法非常有意思的模拟驾驶游戏,高清3d画质</p> </div> </div> <span class="figure-btn">下载</span> </a> </li> <li class="card10"> <a href="/app/146187.htm" target="_self" class="figure2"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489a4fbe67d1.png" alt="油管主播的生活2内置菜单版" /> </div> <div class="figure-cont"> <p class="figure-head">油管主播的生活2内置菜单版</p> <div class="figure-desc"> <span>模拟经营</span> <span>油管主播的生活2内置菜单版</span> </div> <div class="figure-desc"> <p>油管主播的生活2内置菜单版是一款模拟养成类游戏,在这里你将体</p> </div> </div> <span class="figure-btn">下载</span> </a> </li> <li class="card10"> <a href="/app/146188.htm" target="_self" class="figure2"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489a532a3341.png" alt="网吧老板模拟器2手机版" /> </div> <div class="figure-cont"> <p class="figure-head">网吧老板模拟器2手机版</p> <div class="figure-desc"> <span>模拟经营</span> <span>网吧老板模拟器2手机版</span> </div> <div class="figure-desc"> <p>网吧老板模拟器2是非常受欢迎的模拟经营题材手游,在原本的基础</p> </div> </div> <span class="figure-btn">下载</span> </a> </li> <li class="card10"> <a href="/app/146189.htm" target="_self" class="figure2"> <div class="figure-box"> <img src="/images/lazy.gif" data-src="https://img.111cn.net/uploads/20251222/logo_69489a56f3dca1.png" alt="美国警察模拟器巡警2024最新版" /> </div> <div class="figure-cont"> <p class="figure-head">美国警察模拟器巡警2024最新版</p> <div class="figure-desc"> <span>模拟经营</span> <span>美国警察模拟器巡警2024最新版</span> </div> <div class="figure-desc"> <p>美国警察模拟器是一款好玩的模拟手游,游戏中你将扮演一位警察,</p> </div> </div> <span class="figure-btn">下载</span> </a> </li> </ul> </section> <footer class="foot"> <a href="/" class="logo-icon"> <img src="/mobile/images/logo2.png" alt="一聚教程网"> </a> <p>Copyright © 2010-2022</p> <p>111cn.net All Rights Reserved</p> </footer> <script> var advData = {"img_fixed_pc_adv":"https:\/\/img.111cn.net\/uploads\/20240509\/663c2e9729f58.jpg","img_fixed_mob_adv":"https:\/\/img.111cn.net\/uploads\/20240509\/663c2e8793225.jpg","url_adv":"http:\/\/shop.hushen.cn\/shop\/c\/baojianpin.html","str_adv":"\u864e\u795e\u5546\u57ce\uff1a\u5173\u7231\u7537\u6027\uff0c\u66f4\u61c2\u7537\u4eba\u3002\u89e3\u51b3\u5927\u4f17\u7684\u7537\u8a00\u4e4b\u9690","img_popup_adv":"https:\/\/img.111cn.net\/uploads\/20240509\/663c2e748238d.png","pc_show_img":"2","pc_show_popup":"2","pc_show_video":"2","mob_show_img":"2","mob_show_popup":"2","mob_show_video":"2","close_adv":"https:\/\/img.111cn.net\/uploads\/20240508\/663b20650801e.png","video_adv":"\/pc\/images\/pc-adv.mp4"}; </script> <script src="/jspc/funcmob.js" type="text/javascript"></script> <!-- Google tag (gtag.js) --> <script async src="https://www.googletagmanager.com/gtag/js?id=G-DSRRGRV1TL"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-DSRRGRV1TL'); </script> <div class="back-top" style="display: block;"> <span class="icon-box"> <svg class="icon" viewBox="0 0 1024 1024"> <path d="M213.333333 640h170.666667v256h256v-256h170.666667l-298.666667-341.333333zM170.666667 128h682.666666v85.333333H170.666667z" fill="#0374f3"></path> </svg> </span> </div> </div> <script src="/js/stat.js"></script> </body> </html>