Cache Class for PHP

Just another php cache class that you can find in Internet..

The difference? super easy to use 😉

Usage:
Initialize:

$cache = new Cache();

Set expire time (by default 3600 seconds)

$cache = new Cache(15);

Set the path (by default “cache/”)

$cache = new Cache(120,"/any_other_path/");

Read a “Key”:

$value = $cache->get("some_data");

Write a “Key”:

$cache->put("some_data", "some_value");

Full example to cache a query:

$cache = new Cache();
$values = $cache->get($query);//setting values from cache

if ($values==false) {	//not value from cache found
	$result=mysql_query($query);
	if (mysql_num_rows($result)>0){//checking if there's more than one result
		while($row = mysql_fetch_assoc($result))  array_push($values, $row);  //feed array
		$cache->put($query, $values);	//save cache
	}
}
print_r($values);

The Class:

class Cache {
	private $cache_path;//path for the cache
	private $cache_expire;//seconds that the cache expires

	//cache constructor, optional expiring time and cache path
	public function Cache($exp_time=3600,$path="cache/"){
		$this->cache_expire=$exp_time;
		$this->cache_path=$path;
	}

	//returns the filename for the cache
	private function fileName($key){
		return $this->cache_path.md5($key);
	}

	//creates new cache files with the given data, $key== name of the cache, data the info/values to store
	public function put($key, $data){
		$values = serialize($data);
		$filename = $this->fileName($key);
		$file = fopen($filename, 'w');
	    if ($file){//able to create the file
	        fwrite($file, $values);
	        fclose($file);
	    }
	    else return false;
	}

	//returns cache for the given key
	public function get($key){
		$filename = $this->fileName($key);
		if (!file_exists($filename) || !is_readable($filename)){//can't read the cache
			return false;
		}
		if ( time() < (filemtime($filename) + $this->cache_expire) ) {//cache for the key not expired
			$file = fopen($filename, "r");// read data file
	        if ($file){//able to open the file
	            $data = fread($file, filesize($filename));
	            fclose($file);
	            return unserialize($data);//return the values
	        }
	        else return false;
		}
		else return false;//was expired you need to create new
 	}
}