Someone

function ago($timestamp){	$difference = time() - $timestamp;	if($difference < 60)		return $difference." seconds ago";	else{		$difference = round($difference / 60);		if($difference < 60)	    	return $difference." minutes ago";		else{	    	$difference = round($difference / 60);	    	if($difference < 24) 	        	return $difference." hours ago";	      	else{	        	$difference = round($difference / 24);	        	   	return $difference." days ago";	       }		}	}}