interface Observer { 
    function handleEvent($obj,$n,$name);
}

class Cache implements Observer { 
    
    public function handleEvent($obj,$n,$name) {
        if($obj instanceof Content) {
            $this->clear($n,$name);
        }
    }
    
	public function clear($n,$name) {
		if($n==1){
			$date=date('Y-m-d G:i:s');
			$source = $name."|".$date."| 1\r\n";
			$file = "file.txt";
			$Saved_File = fopen($file, 'a+');
			fwrite($Saved_File, $source);
			fclose($Saved_File);
		}
		if($n==0){
			$date=date('Y-m-d G:i:s');
			$source = $name."|".$date."| 0\r\n";
			$file = "file.txt";
			$Saved_File = fopen($file, 'a+');
			fwrite($Saved_File, $source);
			fclose($Saved_File);
		}
	}
}
class CacheBD extends DB implements Observer { 
    
    public function handleEvent($obj,$n,$name) {
        if($obj instanceof Content) {
            $this->clear($n,$name);
        }
    }
    
	public function clear($n,$name) {
		$conn=self::getInstance()->bd();
		
		if($n==1){
			$date=date('Y-m-d G:i:s');
			$result="INSERT INTO activation (name,date,act) VALUES ('$name','$date','1')";
			$snm=$conn->query($result);
		}
		
		if($n==0){
			$date=date('Y-m-d G:i:s');
			$result="INSERT INTO activation (name,date,act) VALUES ('$name','$date','0')";
			$snm=$conn->query($result);
		}
	}
}
class Content extends DB{
	protected $n;
	protected $name;
    private $observers = array();
    
    public function addObserver(Observer $obj) {
        $this->observers[] = $obj;
    }
    
    public function removeObserver(Observer $obj) {
        $newObservers = array();
        foreach ($this->observers as $obs) {
            if ($obj !== $obs) {
                $newObservers[] = $obs;
            }
        }
        $this->observers = $newObservers;
    }
    
    public function notifyObservers() {
        foreach($this->observers as $obj) {
            $obj->handleEvent($this,$this->n,$this->name);
        }
    }
    
    public function change() {
		if(isset($_POST['name']) && $_POST['name']!='' && isset($_POST['pass']) && $_POST['pass']!=''){
			
			$strEmailAddress=mysql_escape_string(stripslashes(trim(strip_tags($_POST['name']))));;
			$pass=mysql_escape_string(stripslashes(trim(strip_tags($_POST['pass']))));;
			
			$this->strNam = $strEmailAddress;
			$conn=self::getInstance()->bd();
			$result="SELECT name FROM user where name='$strEmailAddress' and pass='$pass'";
			$snm=$conn->query($result);
			$myrow=$snm->fetch(PDO::FETCH_ASSOC);
			if($myrow==true){
				echo '1';
				$this->name=$strEmailAddress;
				$this->n=1;}
			else{
				echo '0';
				$this->name=$strEmailAddress;
				$this->n=0;}
			 $this->notifyObservers();
		}
       
    }
}

$content = new Content;
$content->addObserver(new Cache());
$content->addObserver(new CacheBD());
$content->change();