在PHP中嵌套的JSON輸出

Question

我正在爲iOS應用程序構建一個API，並試圖將mySQL數據轉換爲JSON字符串進行處理。所需的輸出將需要頂級訂單詳細信息，如客戶名稱和地址，然後訂購產品的子陣列。

在我需要的兩張表中都有相當多的字段，我希望能夠擁有所有字段。我已經構建了一個腳本來執行此操作，但輸出報告爲JSON驗證器中的格式不正確。

這裏是我的代碼：

$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); 
} 

的電流輸出是這樣的：

這裏的原始輸出，通過要求：

[{"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... 

我只是與這一個難住。或者我需要逐項列出數據集中的每個字段以輸出乾淨的JSON？

Answer 1

這不是從疑問清楚，但我想你需要的東西是這樣的：

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

如果這是正確的，你需要重構你的代碼一點點。首先，您必須將products數組放在$row_array數組中，該數組應該是$row，不包含它。由於$row似乎是公共屬性的對象，你可以只投$row數組並將其分配給$row_array：

$row_array = (array) $row; 

正如你所看到的，不需要一個$row_array用來包裝$row，你$row_array應您的$row。

最後，避免使用array_push()時，你必須只有一個元素在數組末尾推：

$json_response[] = $row_array; 

比array_push()更快。

最後一塊，你需要代碼僅僅是這樣的：

$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);