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采集出来的代码
<p>a.removeAttribute('src'); </p><p>var obj = window.__getVideoWh(a), </p><p>mydiv = document.createElement('img'); </p><p>mydiv.className = "img_loading"; mydiv.src="data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWNgYGBgAAAABQABh6FO1AAAABJRU5ErkJggg=="; </p><p>mydiv.setAttribute("data- vid",vid); </p><p>mydiv.style.cssText = "宽度: " + obj.w + "px !重要;高度: " + obj.h + "px !重要;"; </p> <p>a.style.display = "无"; </p><p>insertAfter(mydiv,a); </p><p>a.style.cssText += ";宽度: " + obj.w + " px !important;height: " + obj.h + "px !important;"; </p><p>a.setAttribute("width",obj.w); </p><p>a.setAttribute("height ",obj.h); </p><p>a.setAttribute("data-vh",obj.vh); </p><p>a.setAttribute("data-vw",obj.vw); </p><p>a.setAttribute("src",location.protocol+"//v.qq.com/iframe/player.html?&auto=0"frameborder=0allowfullscreen></iframe></p> </p><p>微信的js里面的iframe代码</p><p>(function(){ </p><p>var iframe = document.getElementsByTagName('iframe'); </p><p>for ( var i=0,il=iframe.length;i<il;i++) { </p><p>var a = iframe[i]; </p><p>var src_ = a.getAttribute('src')| |a.getAttribute('data-src')||""; </p><p>if(!/http(s)*\:\/\/v\.qq\.com\/iframe\/(预览|播放器)\.html\?/.test(src_)){ </p><p>继续; </p><p>} </p><p>var vid = getQuery("vid",src_); </p><p>if(!vid){ </p><p>继续; </p><p>} </p><p>vid=vid.replace(/^[\s\uFEFF\xA0]+ |[\s\uFEFF\xA0]+$/g,""); </p><p>a.removeAttribute('src'); </p><p>var obj = window.__getVideoWh(a), </p><p>mydiv = document.createElement('img'); </p><p>mydiv.className = "img_loading"; </p><p>mydiv.src="data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWNgYGBgAAAABQABh6FO1AAAABJRU5ErkJg gg ==>; </p><p>mydiv.setAttribute("data-vid",vid); </p><p>mydiv.style.cssText = "width: " + obj.w + "px !important;height: " + obj.h + "px !important;"; </p><p>a.style.display = "none"; </p><p>insertAfter(mydiv,a); </p><p>a.style.cssText += ";width: " + obj.w + "px !important;height: " + obj.h + "px !important;"; </p><p>a.setAttribute("width",obj.w); </p><p>a.setAttribute("height",obj.h); </p><p>a.setAttribute("data-vh",obj.vh); </p><p>a.setAttribute("data-vw",obj.vw); </p><p>a.setAttribute("data-src",location.protocol+"//v.qq.com/iframe/player.html?vid="+ vid + "&width="+obj.vw+"&height="+obj.vh+"&auto=0"); </p><p>} </p><p>})(); </p><p>})(); </p><p>为什么会自动吧这串js代码采集过来了，有视频的时候就显示出来 没有视频的时候采集出来就是上面的代码 求解释</p></div><div class='info mb-10'><a rel="nofollow" href=" http://m.php.cn/zh/member/10739.html"><img src='https://img.php.cn/upload/avatar/000/000/001/049c44c9f22407d450fa2b07948ee6b6.png' alt="牵佑手--不弃."><span style="margin-left: 5px;">牵佑手--不弃.</span></a><span class='pl-10'>2622 天前</span><span class='pl-10'>3227 <b class="kclbcollectb"></b></span></div></div><div class="course-list discuss layui-clear bg-white"><h3>全部回复(1)<span class="detail_answer"><span id="discuss-wenda">我来回复</span></span></h3><li class="layui-clear"><div class="discuss-img"><img src="https://img.php.cn/upload/avatar/000/000/001/6251028808086368.png" alt="PHP中文网"></div><div class="info f-left ml-10"><p><a rel="nofollow" href="http://m.php.cn/zh/member/1.html" fid="" class="replyer-name">PHP中文网</a><span>2017-07-19 10:53:23</span></p><p class="content Overflow_line"><p>可以使用phpquery来处理采集过来的内容，，，<br/></p></p><span class="detail_answer2" style="float: left" fid="228039"><div class="btn wenda-second-btn" name="PHP中文网" fid="228039">回复</div></span><i class="layui-icon layui-icon-praise wenda-praise-btn"><span>1</span></i></div></li><div class='more'></div></div><div class='discuss-submit bg-white'><li class='info layui-clear'><span class='f-left' id='discuss-submit-close'>取消</span><span class='f-left wenda-reply-text'>回复</span></li><li class='layui-clear'><textarea type='text' rows="6" placeholder="请输入您的评论内容" class="wenda-reply-content-text"></textarea></li><li class='layui-clear'><button class="layui-btn layui-btn-danger f-right 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