echo "<a href='phpwan.php?pageno=($pageno+1)'>下一页<a> ";

本来就是这样啊，你应该写成。

echo "<a href='phpwan.php?pageno=" . ($pageno+1) . "'>下一页</a>"

<p>目前主流美白方式有两种：</p><p><strong>1、冷光美白</strong></p><p>一种在牙齿表面涂抹美白剂后，使用冷光美白仪照射一定时间后达到牙齿美白效果。原理是通过特定波长的蓝光对美白剂起到催化作用，让美白剂发生氧化还原反应。</p><p>由于主流美白剂含有化学成分，所以部分人做完冷光美白后会出现酸胀等副作用，并不是所有人都适合。而且效果有限，对四环素牙、氟斑牙等情况改善效果不大。</p><p style=\"text-align:center\"><img src=\"http://img.verym.com/uploadfile/image/20200409/1586422952509184.jpg\" title=\"牙齿贴片美白效果图\" alt=\"牙齿贴片美白效果图\" width=\"500\" height=\"125\" border=\"0\" vspace=\"0\" style=\"width: 500pxheight: 125px\"/></p><p><strong>2、贴片美白</strong></p><p>更高阶更有效的牙齿美白方式，通过对牙齿表面牙釉质进行0.2mm打磨后，使用特用粘合剂粘贴到牙齿表面，是目前市场上较为受欢迎的牙齿美白有效手段。</p><p>由于美学贴片材质影响，多数能够改善轻度四环素牙、氟斑牙，而且表面光泽度、纹路都能媲美真牙，而且还能改善牙齿过小、牙间隙过大、牙齿部分缺损等情况。</p><p><!--5f39ae17-8c62-4a45-bc43-b32064c9388a:[{"blockId":"5834-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[{"char":"目"},{"char":"前"},{"char":"主"},{"char":"流"},{"char":"美"},{"char":"白"},{"char":"方"},{"char":"式"},{"char":"有"},{"char":"两"},{"char":"种"},{"char":"："}],"isRichText":true,"keepLineBreak":true}},{"blockId":"8056-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[{"char":"1"},{"char":"、"},{"char":"冷"},{"char":"光"},{"char":"美"},{"char":"白"}],"isRichText":true,"keepLineBreak":true}},{"blockId":"2471-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[{"char":"一"},{"char":"种"},{"char":"在"},{"char":"牙"},{"char":"齿"},{"char":"表"},{"char":"面"},{"char":"涂"},{"char":"抹"},{"char":"美"},{"char":"白"},{"char":"剂"},{"char":"后"},{"char":"，"},{"char":"使"},{"char":"用"},{"char":"冷"},{"char":"光"},{"char":"美"},{"char":"白"},{"char":"仪"},{"char":"照"},{"char":"射"},{"char":"一"},{"char":"定"},{"char":"时"},{"char":"间"},{"char":"后"},{"char":"达"},{"char":"到"},{"char":"牙"},{"char":"齿"},{"char":"美"},{"char":"白"},{"char":"效"},{"char":"果"},{"char":"。"},{"char":"原"},{"char":"理"},{"char":"是"},{"char":"通"},{"char":"过"},{"char":"特"},{"char":"定"},{"char":"波"},{"char":"长"},{"char":"的"},{"char":"蓝"},{"char":"光"},{"char":"对"},{"char":"美"},{"char":"白"},{"char":"剂"},{"char":"起"},{"char":"到"},{"char":"催"},{"char":"化"},{"char":"作"},{"char":"用"},{"char":"，"},{"char":"让"},{"char":"美"},{"char":"白"},{"char":"剂"},{"char":"发"},{"char":"生"},{"char":"氧"},{"char":"化"},{"char":"还"},{"char":"原"},{"char":"反"},{"char":"应"},{"char":"。"}],"isRichText":true,"keepLineBreak":true}},{"blockId":"9818-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[{"char":"由"},{"char":"于"},{"char":"主"},{"char":"流"},{"char":"美"},{"char":"白"},{"char":"剂"},{"char":"含"},{"char":"有"},{"char":"化"},{"char":"学"},{"char":"成"},{"char":"分"},{"char":"，"},{"char":"所"},{"char":"以"},{"char":"部"},{"char":"分"},{"char":"人"},{"char":"做"},{"char":"完"},{"char":"冷"},{"char":"光"},{"char":"美"},{"char":"白"},{"char":"后"},{"char":"会"},{"char":"出"},{"char":"现"},{"char":"酸"},{"char":"胀"},{"char":"等"},{"char":"副"},{"char":"作"},{"char":"用"},{"char":"，"},{"char":"并"},{"char":"不"},{"char":"是"},{"char":"所"},{"char":"有"},{"char":"人"},{"char":"都"},{"char":"适"},{"char":"合"},{"char":"。"},{"char":"而"},{"char":"且"},{"char":"效"},{"char":"果"},{"char":"有"},{"char":"限"},{"char":"，"},{"char":"对"},{"char":"四"},{"char":"环"},{"char":"素"},{"char":"牙"},{"char":"、"},{"char":"氟"},{"char":"斑"},{"char":"牙"},{"char":"等"},{"char":"情"},{"char":"况"},{"char":"改"},{"char":"善"},{"char":"效"},{"char":"果"},{"char":"不"},{"char":"大"},{"char":"。"}],"isRichText":true,"keepLineBreak":true}},{"blockId":"5446-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[],"isRichText":true,"keepLineBreak":true}},{"blockId":"7348-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[{"char":"2"},{"char":"、"},{"char":"贴"},{"char":"片"},{"char":"美"},{"char":"白"}],"isRichText":true,"keepLineBreak":true}},{"blockId":"6776-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[{"char":"更"},{"char":"高"},{"char":"阶"},{"char":"更"},{"char":"有"},{"char":"效"},{"char":"的"},{"char":"牙"},{"char":"齿"},{"char":"美"},{"char":"白"},{"char":"方"},{"char":"式"},{"char":"，"},{"char":"通"},{"char":"过"},{"char":"对"},{"char":"牙"},{"char":"齿"},{"char":"表"},{"char":"面"},{"char":"牙"},{"char":"釉"},{"char":"质"},{"char":"进"},{"char":"行"},{"char":"0"},{"char":"."},{"char":"2"},{"char":"m"},{"char":"m"},{"char":"打"},{"char":"磨"},{"char":"后"},{"char":"，"},{"char":"使"},{"char":"用"},{"char":"特"},{"char":"用"},{"char":"粘"},{"char":"合"},{"char":"剂"},{"char":"粘"},{"char":"贴"},{"char":"到"},{"char":"牙"},{"char":"齿"},{"char":"表"},{"char":"面"},{"char":"，"},{"char":"是"},{"char":"目"},{"char":"前"},{"char":"市"},{"char":"场"},{"char":"上"},{"char":"较"},{"char":"为"},{"char":"受"},{"char":"欢"},{"char":"迎"},{"char":"的"},{"char":"牙"},{"char":"齿"},{"char":"美"},{"char":"白"},{"char":"有"},{"char":"效"},{"char":"手"},{"char":"段"},{"char":"。"}],"isRichText":true,"keepLineBreak":true}},{"blockId":"5043-1586422200254","blockType":"paragraph","styles":{"align":"left","back-color":"","padding":"","indent":0,"text-indent":0,"line-height":1.75},"type":"paragraph","richText":{"data":[{"char":"由"},{"char":"于"},{"char":"美"},{"char":"学"},{"char":"贴"},{"char":"片"},{"char":"材"},{"char":"质"},{"char":"影"},{"char":"响"},{"char":"，"},{"char":"多"},{"char":"数"},{"char":"能"},{"char":"够"},{"char":"改"},{"char":"善"},{"char":"轻"},{"char":"度"},{"char":"四"},{"char":"环"},{"char":"素"},{"char":"牙"},{"char":"、"},{"char":"氟"},{"char":"斑"},{"char":"牙"},{"char":"，"},{"char":"而"},{"char":"且"},{"char":"表"},{"char":"面"},{"char":"光"},{"char":"泽"},{"char":"度"},{"char":"、"},{"char":"纹"},{"char":"路"},{"char":"都"},{"char":"能"},{"char":"媲"},{"char":"美"},{"char":"真"},{"char":"牙"},{"char":"，"},{"char":"而"},{"char":"且"},{"char":"还"},{"char":"能"},{"char":"改"},{"char":"善"},{"char":"牙"},{"char":"齿"},{"char":"过"},{"char":"小"},{"char":"、"},{"char":"牙"},{"char":"间"},{"char":"隙"},{"char":"过"},{"char":"大"},{"char":"、"},{"char":"牙"},{"char":"齿"},{"char":"部"},{"char":"分"},{"char":"缺"},{"char":"损"},{"char":"等"},{"char":"情"},{"char":"况"},{"char":"。"}],"isRichText":true,"keepLineBreak":true}}]--></p><p>推荐阅读<br/></p><p><a href=\"http://www.verym.com/gonglve/10684.html\" target=\"_self\" style=\"font-size: 12pxtext-decoration: underline\"><span style=\"font-size: 12px\">牙贴面有什么后遗症吗？为什么总有人说千万别做牙齿贴面</span></a></p><p><a href=\"http://www.verym.com/yiyuan/1119/gl_10527.html\" target=\"_self\" style=\"font-size: 12pxtext-decoration: underline\"><span style=\"font-size: 12px\">二氧化锆全瓷牙多少钱一颗？氧化锆材料真的比树脂好吗？</span></a></p><p><a href=\"http://www.verym.com/gonglve/10533.html\" target=\"_self\" style=\"font-size: 12pxtext-decoration: underline\"><span style=\"font-size: 12px\">科普：牙套双模VS单模差距，时代天使双模比单模快多久？</span></a></p>

---