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怎么在文件名中每间隔两个字符添加符号

Jun 13, 2016 pm 01:08 PM
quot replace str substr

如何在文件名中每间隔两个字符添加符号
文件名是格式是这样: ab-cb-ef
使用str_replace把中横线过滤掉然后保存到数据库.
当从数据库里取出abcdef时,如何实现每隔2个字符插入"-", 得到ab-cd-ef 的文字? 谢谢.

------解决方案--------------------

PHP code
$str='abcdef';
for($i=0;$i<strlen echo join></strlen><font color="#e78608">------解决方案--------------------</font><br>trim(preg_replace('~(.{2})~','$1-',$x),'-'); <div class="clear">
                 
              
              
        
            </div>
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