尝试在PHP中使用json_encode

Question

Here is my small script

$item="Inception";

$query="SELECT * FROM items WHERE item = '{$item}' LIMIT 1";
$result=mysql_query($query);
while ($row = mysql_fetch_array($result)) { 
    $item_id = $row['items_id'];
}   

$sql="SELECT AVG(rating) AS AverageRating FROM ratings WHERE item_id = '{$item_id}'";
$result=mysql_query($sql);
$row=mysql_fetch_array($result);

print(json_encode($row));

The output is this:

 {"0":"4.5","AverageRating":"4.5"}

My question is: Where is row "0" coming from? Is this normal?

Answer 1

mysql_fetch_array returns both a string association and a numeric association. Try mysql_fetch_assoc or mysql_fetch_row alone.