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php中文字符截取防乱码_php技巧

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Release： 2016-05-17 09:37:48
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先看段代码 

复制代码 代码如下:


$len = 15;          

$str = "这个新闻或是文章的标题很长，需要只显示前面一些字，后面用...来代替";       
echo strlen($str)?>  
 

chr(0)相关知识：
null是什么都没有，而chr(0)的值是0。表示成16进制是0x00，表示成二进制是00000000 
虽然chr(0)不会显示出什么，但是他是一个字符。 


淡水ps：
如果是UTF-8，UTF-8中的汉字是3个字节的，截取的长度尽量去3的倍数，以避免乱码的产生
Related labels：
php Chinese characters Garbled characters intercept
source：php.cn
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