截取字符串，长度不一样
<?PHP $prna=$row['description']; if(strlen($prna)>20) { $prna=mb_substr($prna,0,40,'utf-8')."...."; echo $prna; } else { echo $prna; } ?> 截图经常上传不了，不知道是不是电脑有问题
结果：
MicroSD ? Produo DUO ??器....
PSP3000 排?(3件?)....
iPhone3GS SIM card 座 （黑色）....
Nokia CA-101D 短 MicroUSB???....
PSP2000 用底?（黑色）....
PSP2000 ?源接? ....
3.5mm ?塞吊?（黑色）....
iPhone 透明底塞 (3?)....
回复讨论(解决方案)
这个最好用css解决（按容器宽度）
因为字符串长度不等于像素宽度
即使你本地显示对齐了，到客户端因为客户端采用的字体不可控，也就意味着像素宽度还是不定
自己在浏览器换一下默认字体你就明白了
你的计算有问题
一般页面文字用默认的宋体显示，所以可以认为一个汉字的显示宽度为两个字母的宽度
要是字体采用了非等宽字体，那情况就要复杂多了，不在这里讨论
对于字母、符号，一个为 1个字节
对于 gbk 编码，一个汉字为 2个字节，正好符合上面的情况
对于 utf-8 编码，一个汉字为 3个字节，即每个汉字要多出 1个字节，计算占位时要 汉字数*2/3
mb_substr 是按字符截取的，无论中文还是西文都算一个。葫芦了占位因素
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