在PHP中嵌套的JSON输出

Question

我正在为iOS应用程序构建一个API，并试图将mySQL数据转换为JSON字符串进行处理。所需的输出将需要顶级订单详细信息，如客户名称和地址，然后订购产品的子阵列。

在我需要的两张表中都有相当多的字段，我希望能够拥有所有字段。我已经构建了一个脚本来执行此操作，但输出报告为JSON验证器中的格式不正确。

这里是我的代码：

$orders = $db->get_results("SELECT ords.serial as ID, cust.title, cust.name, cust.surname, cust.address, cust.address2, cust.town, cust.county, cust.postcode, cust.phone, cust.height, cust.weight, cust.houseType, cust.parking, cust.access, ords.furnitureRem, ords.furnitureRemDetails, ords.comments FROM orders as ords JOIN customers as cust ON ords.customerid = cust.serial JOIN order_detail as odeet ON ords.serial = odeet.orderid JOIN `user` as us ON us.id = ords.user_id WHERE us.id='".$_REQUEST['userID']."' GROUP BY ords.serial ORDER BY cust.serial DESC"); 

$json_response = array(); //Create an array 
foreach ($orders as $row) 
{ 
    $row_array = array(); 
    $row_array[] = $row;   
    $ord_id = $row->ID; 

    $orders2 = $db->get_results("SELECT * FROM order_detail as ord 
    JOIN products as prod ON ord.productid = prod.id 
    WHERE ord.orderid = ".$ord_id); 
    foreach ($orders2 as $vorder2) { 
    { 
     $row_array['products'][] = $vorder2; 
    } 
    array_push($json_response, $row_array); //push the values in the array 
} 
echo json_encode($json_response); 
} 

的电流输出是这样的：

这里的原始输出，通过要求：

[{"0":{"ID":"756","title":"Mr","name”:”John”,”surname”:”Smith”,”address”:”Address Line 1”,”address2”:”Address Line 2”,”town”:”Town","county”:”County”,”postcode”:”PO57 8DE”,”phone":"0777777777777”,”height":"6ft","weight":"14st","houseType":"Flat","parking":"none","access":"No problems","furnitureRem":"0","furnitureRemDetails":null,"comments":null},"products":[{"orderid":"756","productid":"2","price":"6500","status":"1","id":"2","type":"Chair","style":"Surrey","action":"Single Motor 2 Way Tilt in Space","weightCap":"35st","height":"14\"","width":"24\"","internalWidth":null,"length":null,"internalLength":null,"depth":"16\"","fabric":"Leather","fabricCode":"LR43","backStyle":"Waterfall","cushionFabric":"Leather","cushionFabricCode":"LR43","backHeight":"32\"","armHeight":"7\"","seatingOptions":"Memory Foam","armOption":"Scrolled","backupBattery":"2x Backup","headRoll":"1","headCover":"1","seatCover":"0","armCover":"0","armCap":"1","pocket":"Left","loop":"Left","antimacassar":"0","freedom":"1","heatMassage":"0","castorsGlides":"Castors","footPlate":"0","seatDepthAdj":"0","doorFrame":null,"additionalCover":"0","scViscoform":"0","scPommelViscoform":"0","scLiquiform":"0","scPommelLiquiform":"0","scCelliform":"0","scAirform":"0","scDynaform":"0","bsWaterfall":"0","bsComfortLateral":"0","bsProfileWaterfall":"0","bsProfileComfortLateral":"0","bsSupportLateral":"0","bsProfileSupportLateral":"0","hsLargeProfileHeadrest":"0","hsSmallHeadPillow":"0","hsSmallProfileHeadPillow":"0","hsMidlineHeadrest":"0","woodColour":"0","frameColour":null,"baseColour":null,"headFootBoard":null,"mattressType":null,"productHeightLowest":null,"productHeightHighest":null,"liftingPoles":null,"grabRails":null,"readingLight":"0","existingBedHeight":null,"legHeight":null,"drawerOptions":null,"hoistCutouts":"0","cotSides":null,"liftingPole":"0","sideRetention":"0","linked":"0","rrp":null,"stock":"0"}]}][{"0":{"ID":"756","title":"Mr","name":"John","surname":"Smith","address":"Address Line 1","address2":"Address Line 2","town":"Town","county":"County","postcode":"PO57 8DE","phone":"0777777777777","height":"6ft","weight":"14st","houseType":"Flat","parking":"none","access":"No problems","furnitureRem":"0","furnitureRemDetails":null,"comments":null},"products":[{"orderid":"756","productid":"2","price":"6500","status":"1","id":"2","type":"Chair","style":"Surrey","action":"Single Motor 2 Way Tilt in Space","weightCap":"35st","height":"14\"","width":"24\"","internalWidth":null,"length":null,"internalLength":null,"depth":"16\"","fabric":"Leather","fabricCode":"LR43","backStyle":"Waterfall","cushionFabric":"Leather","cushionFabricCode":"LR43","backHeight":"32\"","armHeight":"7\"","seatingOptions":"Memory Foam","armOption":"Scrolled","backupBattery":"2x Backup","headRoll":"1","headCover":"1","seatCover":"0","armCover":"0","armCap":"1","pocket":"Left","loop":"Left","antimacassar":"0","freedom":"1","heatMassage":"0","castorsGlides":"Castors","footPlate":"0","seatDepthAdj":"0","doorFrame":null,"additionalCover":"0","scViscoform":"0","scPommelViscoform":"0","scLiquiform":"0","scPommelLiquiform":"0","scCelliform":"0","scAirform":"0","scDynaform":"0","bsWaterfall":"0","bsComfortLateral":"0","bsProfileWaterfall":"0","bsProfileComfortLateral":"0","bsSupportLateral":"0","bsProfileSupportLateral":"0","hsLargeProfileHeadrest":"0","hsSmallHeadPillow":"0","hsSmallProfileHeadPillow":"0","hsMidlineHeadrest":"0","woodColour":"0","frameColour":null,"baseColour":null,"headFootBoard":null,"mattressType":null,"productHeightLowest":null,"productHeightHighest":null,"liftingPoles":null,"grabRails":null,"readingLight":"0","existingBedHeight":null,"legHeight":null,"drawerOptions":null,"hoistCutouts":"0","cotSides":null,"liftingPole":"0","sideRetention":"0","linked":"0","rrp":null,"stock":"0"}]},{"0":{"ID":"756",""title":"Mr","name":"John","sur... 

我只是与这一个难住。或者我需要逐项列出数据集中的每个字段以输出干净的JSON？

Answer 1

这不是从疑问清楚，但我想你需要的东西是这样的：

[ 
    { 
    "ID": 123, 
    ... 
    "products": [ 
     { 
     "foo": "bar" 
     }, 
     { 
     "foo": "baz" 
     } 
    ] 
    }, 
    { 
    ... 
    } 
] 

如果这是正确的，你需要重构你的代码一点点。首先，您必须将products数组放在$row_array数组中，该数组应该是$row，不包含它。由于$row似乎是公共属性的对象，你可以只投$row数组并将其分配给$row_array：

$row_array = (array) $row; 

正如你所看到的，不需要一个$row_array用来包装$row，你$row_array应您的$row。

最后，避免使用array_push()时，你必须只有一个元素在数组末尾推：

$json_response[] = $row_array; 

比array_push()更快。

最后一块，你需要代码仅仅是这样的：

$orders = $db->get_results(("SELECT ords.serial as ID, cust.title, cust.name, cust.surname, cust.address, cust.address2, cust.town, cust.county, cust.postcode, cust.phone, cust.height, cust.weight, cust.houseType, cust.parking, cust.access, ords.furnitureRem, ords.furnitureRemDetails, ords.comments FROM orders as ords JOIN customers as cust ON ords.customerid = cust.serial JOIN order_detail as odeet ON ords.serial = odeet.orderid JOIN `user` as us ON us.id = ords.user_id WHERE us.id='".$_REQUEST['userID']."' GROUP BY ords.serial ORDER BY cust.serial DESC"); 

$json_response = array(); 
foreach ($orders as $row) { 
    $row_array = (array) $row; 
    $ord_id = $row->ID; 

    $orders2 = $db->get_results("SELECT * FROM order_detail as ord 
     JOIN products as prod ON ord.productid = prod.id 
     WHERE ord.orderid = ".$ord_id); 
    foreach ($orders2 as $vorder2) { 
     $row_array['products'][] = $vorder2; 
    } 
    $json_response[] = $row_array; 
} 
echo json_encode($json_response);