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Homephp教程PHP源码PHP上传文件时如何自动分配的路径

网站上传文件时,如果是小的企业站,放在一个目录还没问题,当网站大了,上传的文件多了,我们就不能放在同一个目录了,现在我们来讲讲用PHP自动给上传的文件分配路径。

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PHP分配上传文件的路径实例
主要程序片段如下:

 代码如下 复制代码
/*数字方式分配路径*/   
function allotPath($id, $extend='jpg') {   
   $folders = str_split(sprintf("%012s", $id),3);   
   $folders[3] = $id;   
   
   return  '/'. join('/', $folders).'.'.$extend;   
}   
   
/*杂凑方式分配路径*/   
function allotHashPath($id, $extend='jpg') {   
   $folders = array_slice( str_split(md5($id),2), 0, 4);   
   $folders[] = $id;   
   
   return  '/'. join('/', $folders).'.'.$extend;   
}   
   
var_dump(allotPath(122333));   
// string(23) "/000/000/122/122333.jpg"   
   
var_dump(allotHashPath(122333));   
// string(23) "/9c/7c/c2/cd/122333.jpg" 

这里我们讲的主要是数方式分配路径及杂凑方式分配路径,我们还可以根据日期来分配,这个问题留给读者自己去实现。

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