PHP data file cache class code example-PHP Tutorial-php.cn

PHP data file cache class code example

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Release： 2016-07-25 08:52:15

Original

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class DataCache
{
/**
* Array conversion
*
* @param array $array
* @param string $arrayName
* @param array $level
*
* @return string
*/
private function arrayEval($array, $arrayName = '', $level = 0)
{
$space = str_repeat("t", $level);
if (emptyempty($arrayName))
{
$evaluate = "arrayn$space(n";
}
else
{
$evaluate = "${$arrayName} = arrayn$space(n";
}
$space2 = str_repeat("t", $level + 1);
$comma = $space2;
if (!emptyempty($array))
{
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";
}
$comma = ",n$space2";
}
}
$evaluate .= "n$space)";
// 最后才需要一个“;”
if ($level == 0)
{
$evaluate .= ";";
}
return $evaluate;
}
/**
* Write cache
*
* @param string $path
* @param string $arrayName
* @param array $data
*
* @return boolean
*/
public static function writeCache($path, $arrayName, $data)
{
if ($handle = fopen($path, 'w+'))
{
$data = self::arrayEval($data, $arrayName);
$dataConvert = "
flock($handle, LOCK_EX);
$rs = fputs($handle, $dataConvert);
flock($handle, LOCK_UN);
fclose($handle);
if ($rs !== false)
{
return true;
}
}
return false;
}
}
?>

复制代码

调用方法:

/**
* Generate file cache
*
* @param string $filePath The save path of the cache file
* @param string $arrayName The name of the array stored in the cache file
* @param array $data Data
*
* @return boolean
*/
DataCache::writeCache($filePath, $arrayName, $data);

复制代码

memcache is used to cache data. The class of this file cache:

/**
* File cache class
* Provides file caching
*/
class Cache_FileCache{
/**
* Set cache
* @param $key cached keyword key
* @param $data cached content
* @param $cacheLife cache time (unit: seconds). If it is 0, it means unlimited time
* @return Bool
*/
public static function setCache($key,$data,$cacheLife)
{
if(file_exists(__SITE_FILE_CACHE))
{
@$file = __SITE_FILE_CACHE . "/" . $key .".php";
$cache = array();
$time = __SYS_TIME;
$cache['content' ] = $data;
$cache['expire'] = $cacheLife === 0 ? 0 : $time+$cacheLife;
$cache['mtime'] = $time;
$cache = serialize($cache);
$setReslut = @file_put_contents($file,$cache) or self::error(__line__,"File writing error");
$chmodReslut = @chmod($file,0777) or self::error(__line__," Failed to set file permissions");
if($setReslut && $chmodReslut)
{
return true;
}
else
{
return false;
}
}
}
/**
* Get cached data
* @param $key cached keyword key
* @return array
*/
public static function getCache($key)
{
@$file = __SITE_FILE_CACHE . "/" . $key .".php";
if(file_exists($file))
{
$data = @file_get_contents($file) ;
$data = unserialize($data);
if($data['expire']==0 || $data['expire'] > __SYS_TIME)
{
return $data['content'];
}
else
{
unlink($file);
return array();
}
}
}
/**
* Delete cache files
* @param $key Cache $key
* @return Bool
*/
public static function delCache($key)
{
if (@unlink (__SITE_FILE_CACHE."/".$key.".php"))
{
return true;
}
else
{
return false;
}
}
/**
* Clear all cache files
* @return Bool
*/
public static function clearAllCache()
{
$files = scandir(__SITE_FILE_CACHE);
foreach ($files as $val)
{
@unlink(__SITE_FILE_CACHE."/".$val);
}
}
/**
* Error handling function
* @param $line line number
* @param $msg information
*/
public static function error($line,$msg)
{
die("Error file: ".__file__."/nError line: $line/nError message: $msg");
}
}
?>

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