php中文件缓存实现程序代码_PHP教程

define('CACHE_ROOT','./');
 include_once('./cache.func.php');
 $file = 'qzp';
 $cacheFile = getCacheFileByID($file,'info/');
 
 print_R(readCache($cacheFile));
 
 $info = array(
      'username'=>'qzp',
      'area_name'=>'admin',
      'mp_name'=>'1234',
      'gh_name'=>'5678');
writeCache($cacheFile,$info);

cache.func.php文件

 function arrayeval($array, $level = 0) {
    $space = '';
    for($i = 0; $i         $space .= "t";
    }
    $evaluate = "Arrayn$space(n";
    $comma = $space;
    foreach($array as $key => $val) {
        $key = is_string($key) ? '''.addcslashes($key, ''').''' : $key;
        $val = !is_array($val) && (!preg_match("/^-?[1-9]d*$/", $val) || strlen($val) > 12) ? '''.addcslashes($val, ''').''' : $val;
        if(is_array($val)) {
            $evaluate .= "$comma$key => ".arrayeval($val, $level + 1);
        } else {
            $evaluate .= "$comma$key => $val";
        }
        $comma = ",n$space";
    }
    $evaluate .= "n$space)";
    return $evaluate;
}
 
function getCacheFileByID($id,$pre='info/',$md5=true){
 if($md5){
  $md5id = md5($id);
  return CACHE_ROOT.'/'.$pre.substr($md5id,0,2).'/'.substr($md5id,2,2).'/'.$id;
 }else{
  return CACHE_ROOT.'/'.$pre.$id;
 }
}
 
function readCache($filename,$time=0){
 if($datas = @file_get_contents($filename)){
  $datas = unserialize($datas);
  if($time    return $datas['data'];
  }
 }
 return false;
}
 
function writeCache($filename,$data){
 makeDir(dirname($filename));
 if($handle = fopen($filename,'w+')){
  $datas = array('data'=>$data,'time'=>time());
  flock($handle,LOCK_EX);
  $rs = fputs($handle,serialize($datas));
  flock($handle,LOCK_UN);
  fclose($handle);
  if($rs!==false){
   return true;
  }
 }
 return false;
}
 
function makeDir($path)
{
 if (! file_exists ( $path )) {
  makeDir ( dirname ( $path ) );
  if (! mkdir ( $path, 0777 ))
  die ( '无法创建文件夹' . $path );
 }
}

//包含Smarty类库
require('libs/Smarty.class.php');
 
//创建Smarty类的对象
$smarty = new Smarty;
 
//启用缓存
$smarty->caching = true;
 
//指定缓存文件保存的目录
$smarty->cache_dir = "./cache/";
 
//也会把输出保存
$smarty->display('index.tpl')
?>