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>"

芡米：

芡实(Euryale ferox)，又名鸡头米，睡莲科芡属一年生大型水生草本植物。根须状，白色。根状茎短缩，叶从短缩茎上抽出，初生叶箭形，过渡叶盾形，定形叶圆形，叶面绿色，皱缩，光亮，背面紫红色，网状叶脉隆起，形似蜂巢。花单生。浆果球形，每果含种子160~200粒，豌豆状，种仁黄色，称为"芡米"。花果期7~9月。性喜温暖水湿，不耐霜寒。芡实广布湖塘沼泽中均有野生江浙一带有栽培。分类一般以产地而言，有南芡、北芡之分。南芡，又称苏芡，产于江苏太湖地区。成龄植株除叶背面有刺外，叶柄、果梗和果实外面都无刺。芡米圆整，不光滑，玉白色，糯性，品质佳。适应性不及北芡。北芡产于洪泽湖地区，为野生或半野生状态。全株密被刚刺，果实小，芡米圆，不整齐，色白，光滑，品质差，适应性强。

营养功效：具有“补而不峻”、“防燥不腻”的特点，是秋季进补的首选食物

基本信息

中文学名：芡实

界：植物界

门：被子植物门

纲：双子叶植物纲

亚纲：原始花被亚纲

目：毛茛目

科：睡莲科

亚科：睡莲亚科

属：芡属

种：芡实

分布区域：于东南亚。我国南北各省区

干芡实可以用来做芡实南瓜粥。

主料：南瓜250克、芡实100克、大米80克

调料：水适量

做法步骤：

1、芡实洗干净用冷水浸泡1个小时

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2、大米洗干净用冷水浸泡

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3、南瓜洗干净

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4、南瓜去皮去瓤

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5、南瓜切成滚刀块

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6、芡实倒入电饭煲内胆

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7、南瓜放入电饭锅内胆，再加适量水，将电饭煲内胆放入电饭煲盖上盖通电选煮粥档煲

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8、再开锅，将大米洗干净入锅同煲，煲粥时间到，断电，焖一会即可盛出享用

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