PHP JSON将输出编号编码为字符串

Question

我正在尝试使用PHP和MySQL输出JSON字符串,但纬度和经度输出为带有值的引号的字符串.当我尝试将标记添加到谷歌地图时,这会导致问题.

这是我的代码:

$sql = mysql_query('SELECT * FROM markers WHERE address !=""');
$results = array();
while($row = mysql_fetch_array($sql))
{
   $results[] = array(
      'latitude' =>$row['lat'],
      'longitude' => $row['lng'],
      'address' => $row['address'],
      'project_ID' => $row['project_ID'],
      'marker_id' => $row['marker_id']
   );
}
$json = json_encode($results);

echo "{\"markers\":";
echo $json;
echo "}";

这是预期的输出:

{"markers":[{"latitude":0.000000,"longitude":0.000000,"address":"2234 2nd Ave, Seattle, WA","project_ID":"7","marker_id":"21"}]}

这是我得到的输出:

{"markers":[{"latitude":"0.000000","longitude":"0.000000","address":"2234 2nd Ave, Seattle, WA","project_ID":"7","marker_id":"21"}]}

请注意纬度和经度值周围的引号.

Answer 1

你也可以试试

echo json_encode( $results, JSON_NUMERIC_CHECK );

一些参考:

PHP JSON常量