效果图：代码：<!--图片广告区域开始--> <div style="background-color:#fff;box-shadow:0px 0px 10px #dedede;padding:5px;margin-top:5px;margin-bottom:5px;"> <!-- <h3 class="fly-panel-title" style="border-bottom:1px dotted #e2e2e2;margin-bottom:10px;"> 赞助商广告 <a style="float:right;color:#dedede;" href="http://4dn.net/" target="_blank" onmouseover="this.style.color='#F00'" onmouseout="this.style.color='#dedede'">广告招商</a> </h3> --> <a class="adplan" data-id="15" style="display:block;width:100%;margin-bottom:10px;" rel="nofollow" target="_blank" href="http://4dn.net/" title="广告联系q：88790363|过期时间：永久"> <img src="http://4dn.net/content/uploadfile/202012/311c1608553723.png" style="max-height:70px;width:100%;border-radius:4px;" width="644" height="70" title="" align="" alt="" /></a> <!--图片广告区域结束--> <!--顶部双排广告第二行--> <style> #nr{ font-size:20px; margin: 0; background: -webkit-linear-gradient(left, #ffffff, #ff0000 6.25%, #ff7d00 12.5%, #ffff00 18.75%, #00ff00 25%, #00ffff 31.25%, #0000ff 37.5%, #ff00ff 43.75%, #ffff00 50%, #ff0000 56.25%, #ff7d00 62.5%, #ffff00 68.75%, #00ff00 75%, #00ffff 81.25%, #0000ff 87.5%, #ff00ff 93.75%, #ffff00 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-size: 200% 100%; animation: masked-animation 2s infinite linear; } @keyframes masked-animation { 0% { background-position: 0 0; } 100% { background-position: -100%, 0; } } </style> <div style="background-color:#333;border-radius:25px;box-shadow:0px 0px 5px #f200ff;padding:5px;margin-top:10px;margin-bottom:0px;"> <marquee> <b id="nr">公告：欢迎来到黑蜘蛛博客网：4dn.net </b> </marquee> </div> <!--顶部双排广告第二行--> <style> .txtguanggao{width: 100%;overflow: hidden;display: block;box-shadow: 0 1px 2px 0 rgba(0,0,0,.05);}.txtguanggao a{width: 24.5%;float: left;border-radius: 2px;line-height: 35.35px;height: 35.35px;text-align: center;font-size: 14px;color: #fff;display: inline-block;background-color: rgb(255, 153, 159);margin: 2.5px;transition-duration: .3s;}.txtguanggao a:nth-child(1) {background-color: #dc3545;}.txtguanggao a:nth-child(2) {background-color: #007bff;}.txtguanggao a:nth-child(3) {background-color: #28a745;}.txtguanggao a:nth-child(4) {background-color: #ffc107;}.txtguanggao a:nth-child(5) {background-color: #28a745;}.txtguanggao a:nth-child(6) {background-color: #ffc107;}.txtguanggao a:nth-child(7) {background-color: #dc3545;}.txtguanggao a:nth-child(8){background-color: #007bff;}.txtguanggao a:hover{background:#FF2805;color:#FFF}@media screen and (max-width: 1000px) {.txtguanggao a{width: 47.96%;float: left;border-radius: 2px;line-height: 35.35px;height: 35.35px;text-align: center;font-size: 14px;color: #fff;display: inline-block;background-color: rgb(255, 153, 159);margin: 2.5px;transition-duration: .3s;}} </style> <div class="txtguanggao"> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> <a href="http://4dn.net/" target="_blank" rel="nofollow" class="dh">文字广告火爆招租</a> </div> </div> <!--文字广告结束-->

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方法 一：使用正则表达式<?php function is_url($url){ $r = "/http[s]?:\/\/[\w.]+[\w\/]*[\w.]*\??[\w=&\+\%]*/is"; if(preg_match($r,$url)){ //return true; echo '正确的 url 地址'; }else{ //return false; echo '不是合法的 url 地址'; } } ?>方案二：使用内置函数 filter_var () 推荐<?php function is_url_2($url){ if (filter_var($url, FILTER_VALIDATE_URL) !== false) { echo 'url 地址正确'; }else{ echo 'url 地址不正确'; } } ?>