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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) {	    		$hoursnow = date('G');	    		$diff = $hoursnow - $difference;	    		if($diff < 0) return 'last night';	    		$h = date('G', strtotime("-$difference hours"));	    		if($h < 12) return 'this morning';	    		if($h < 18) return 'this afternoon';	    		if($h < 24) return 'this evening';	        	return $difference." hours ago";	       }	      	else{	        	$difference = round($difference / 24);	        	if($difference < 2) return 'yesterday';	        	return $difference." days ago";	       }		}	}}