php調用圖片亂碼有關問題

php調用圖片亂碼問題

//城市名
    $city = '長沙';
    //擷取json格式的資料
    $str = file_get_contents("http://api.map.baidu.com/telematics/v3/weather?location=".$city."&output=json&ak=KXrZyXh5wUSBEdo5TkgRQkBz");
 
    //對json格式的字串進行編碼
    $arr = json_decode($str,TRUE);       
 
    echo "城市:".$arr['results'][0]['currentCity']." 日期：".$arr['date']."

";

$wea = "http://1.alilo.sinaapp.com/Weather/0.jpeg";
$weai = imagecreatefromgif($wea);
header("Content-type:image/jpeg");
imagejpeg($weai);
 
    foreach($arr['results'][0]['weather_data']as $val)
    {
       echo $val['date']."
";
       echo "天氣：{$val['weather']}
";
        
       $path = "{$val['dayPictureUrl']}";
       echo "$path";
       $imgInfo = getimagesize($path);
       $imgType = $imgInfo[2];
       switch ($imgType) {
       case 1:
        $img = imagecreatefromgif($path);
        header("Content-type:image/gif");
        imagegif($img);
        break;
       case 2 :
        $img = imagecreatefromjpeg($path);
        header("Content-type:image/jpeg");
        imagejpeg($img);
        break;
       case 3 :
        $img = imagecreatefrompng($path);
        header("Content-type:image/png");
        imagepng($img);
        break; 
       default:
        exit("圖片格式不支援");
    }  
        echo "
";
        //  echo "< img src = "{$val['dayPictureUrl']}" />";
       echo "風向：{$val['wind']}
";
       echo "溫度：{$val['temperature']}

";
     }
?>

代碼如上所示，輸出來的是一串亂碼。
網站：http://1.alilo.sinaapp.com/Weather/Weather.php
------解決思路----------------------

//城市名
    $city = "長沙";
    //擷取json格式的資料
 $string ="http://api.map.baidu.com/telematics/v3/weather?location=".$city."&output=json&ak=KXrZyXh5wUSBEdo5TkgRQkBz";
    $str = file_get_contents($string);
 
 //echo $str;
    //對json格式的字串進行編碼
    $arr = json_decode($str,TRUE);       
 
 
   foreach($arr['results'][0]['weather_data']as $val)
    {
       echo $val['date']."
";
       echo "天氣：{$val['weather']}
";
         
       $path = "{$val['dayPictureUrl']}";
     echo '';
   echo "
";
    echo "
";
        //  echo "< img src = "{$val['dayPictureUrl']}" />";
       echo "風向：{$val['wind']}
";
       echo "溫度：{$val['temperature']}

";
      
    }  
     
    
?>

