php 文件缓存函数

function createHashDir($sign)
{
$md5 = md5($sign);
if(!is_dir(MB_CACHE)) mkdir(MB_CACHE);
for($i=1;$i<=4;$i++)
{
$dir .= $md5{$i}./;
if(!is_dir(MB_CACHE.$dir))
{
mkdir(MB_CACHE.$dir);
}
}
return MB_CACHE.$dir;
}
function setCacheFile($data,$sign = a,$type = array,$id = )
{
$cacheDir = $this -> createHashDir($sign);
if(!empty($data))
{
$id = $id ? $id : $sign;
$cacheFile = $cacheDir.$id..php;
$content = $type == array ? var_export($data,true) : $data;
file_put_contents($cacheFile,<?php $.$sign. = .$content.; ?>);
}
}
function getCacheFile($sign = a,$id = )
{
$cacheDir = $this -> createHashDir($sign);
$id = $id ? $id : $sign;
$cacheFile = $cacheDir.$id..php;
if(is_file($cacheFile) && include_once($cacheFile))
{
return $$sign;
}
}
function getCacheFilePath($sign = a,$id = )
{
$cacheDir = $this -> createHashDir($sign);
$id = $id ? $id : $sign;
return $cacheDir.$id..php;
}
function delCacheFile($sign = a)
{
$cacheDir = $this -> createHashDir($sign);
$id = $id ? $id : $sign;
$cacheFile = $cacheDir.$id..php;
$this -> del_file($cacheFile);
}