在php上顯示圖像int change

Question

在PHP中，如何在int從0變爲1時顯示圖像？我有;

$url = "forums.bukkit.org/alerts.json"; 
$page = file_get_contents($url); 
$json_arr = json_decode($string,true); 
return $json_arr['_visitor_alertsUnread']; 

當json_arr> 0時，如何讓它顯示圖像？

Answer 1

if($json_arr['_visitor_alertsUnread']) 
    echo "seen picture!"; 
else 
    echo "not seen picture!";