php使用json_decode后数字对象转换成了科学计数法的

$obj='{"order_id":213477815351175,"buyer":100001169269154}';
$obj=$this->json_decode($obj,TRUE);
print_r($obj);

Array
(
  [order_id] => 2.1347781535118E+14
  [buyer] => 1.0000116926915E+14
)

$obj='{"order_id":213477815351175,"buyer":100001169269154}';
$obj=$this->json_decode($obj,TRUE);
foreach ($obj as $key=>$val){
    $obj[$key]=number_format($val,0,'','');
}
print_r($obj);

Array
(
  [order_id] => 213477815351175
  [buyer] => 100001169269154
)