MySQL查詢只返回一個結果

Question

我有一個基於Haversine算法獲取地點的查詢。

SELECT 
id, description, name, 
lat, `long`, 
(3959 * acos(cos(radians($lat)) * cos(radians(lat)) * cos(radians(`long`) - radians($long)) + sin(radians($lat)) * sin(radians(lat)))) AS distance 
FROM 
places 
HAVING 
distance < 10 
ORDER BY 
distance 
LIMIT 0, 20; 

然後我回聲出來以JSON陣列是這樣的：

$location = mysql_fetch_assoc($getlocations); 
return print_r(json_encode($location)); 

但是，它只返回一行時應該有至少兩個。任何人都知道爲什麼它會這樣做？謝謝！

Answer 1

while($row = mysql_fetch_assoc($getlocations)){ 
    $location[] = $row; 
} 
return print_r(json_encode($location)); 

Answer 2

你需要在while循環中使用mysql_fetch_assoc()函數。

i.e: 
while($location = mysql_fetch_assoc($getlocations)); 

print_r($location); 

謝謝。