我是API集成和PHP的新手。我最近将VIN解码器集成到我的应用中。在输入框中输入车辆的VIN，然后选择Submit（提交），并显示API数据库中有关该车辆的所有信息。
数据与类别及其对应的元素一起存储为关联数组。例如，对于VIN：WAUBFAFL6FA058452，类别之一是Make，其元素是Audi。
某些VIN携带的数据比其他VIN多。我只希望选择提交时显示带有数据的类别。因此，在一些帮助下，我添加了以下代码行：
foreach ($json['Results'][0] as $k => $v){
if (!empty($v)) {
$results .= ($k).": ".($v).'<br />';
}
}
我的下一个障碍是获取输出，类别及其元素，并组织/格式化它们，同时保持上面定义的逻辑。我只希望显示带有数据的类别。
我不确定如何定位单个类别以设置其格式。当前，输出以字母顺序显示。我想定义自己的输出布局。
当前输出：
AirBagLocCurtain: All Rows
AirBagLocFront: 1st Row (Driver & Passenger)
AirBagLocSide: 1st Row (Driver & Passenger)
BodyClass: Sedan/Saloon
DisplacementCC: 1984
DisplacementCI: 121.071108283
DisplacementL: 1.984000
And so on....
如何更改此布局？我希望将输出布局更改为以下内容。
所需的输出：
VIN: WAUBFAFL6FA058452
General –
Make: AUDI
ModelYear: 2015
Model: A4
BodyClass: Sedan/Saloon
Doors: 4
Series: Premium quattro
VehicleType: PASSENGER CAR
Safety -
AirBagLocCurtain: All Rows
AirBagLocFront: 1st Row (Driver & Passenger)
AirBagLocSide: 1st Row (Driver & Passenger)
SeatBeltsAll: Manual
Engine -
DisplacementCC: 1984
DisplacementCI: 121.071108283
DisplacementL: 1.984000
EngineCylinders: 4
EngineHP: 220
EngineKW: 164.0540
EngineManufacturer: Audi
EngineModel: Flex Fuel Capable engine
TransmissionStyle: Automatic
OtherEngineInfo: Fuel: Gas (50-St); Federal / California Emission Standard: BIN 5 / ULEV II; Emissions Certification Test Group: FVGAV02.0AUB / FVGAJ02.0AUF E85
FuelTypePrimary: Gasoline
FuelTypeSecondary: Ethanol (E85)
Factory -
Manufacturer: AUDI
ManufacturerId: 1149
PlantCity: Ingolstadt
PlantCountry: Germany
Other -
ErrorCode: 0 - VIN decoded clean. Check Digit (9th position) is correct
TPMS: Indirect
这是我的html代码，只是输入栏和提交按钮：
<!DOCTYPE html>
<html>
<head>
<title>VIN Decoder API Test</title>
<style type="text/css">
input,button {width: 200px;display: block;margin-left: auto;margin-right: auto;}
button {width: 100px;background-color: darkgray;}
</style>
</head>
<body>
<form action="processvin3.php" method="post">
<input type="text" id="b12" placeholder="Enter VIN" name="b12" maxlength="100"/>
<br>
<button id="submit_btn">Submit</button>
</form>
<br>
<br>
</body>
</html>
我的php代码：
<?php
$vin = $_POST["b12"];
if ($vin) {
$postdata = http_build_query([
'format' => 'json',
'data' => $vin
]
);
$opts = [
'http' => [
'method' => 'POST',
'content' => $postdata
]
];
$apiURL = "https://vpic.nhtsa.dot.gov/api/vehicles/DecodeVINValuesBatch/";
$context = stream_context_create($opts);
$fp = fopen($apiURL, 'rb', false, $context);
$line_of_text = fgets($fp);
$json = json_decode($line_of_text, true);
fclose($fp);
foreach ($json['Results'][0] as $k => $v){
if (!empty($v)) {
$results .= ($k).": ".($v).'<br />';
}
}
echo $results;
}
else {
echo 'No Vin Inputted';
}
?>
任何建议，技巧或答案将不胜感激。非常感谢。
答案 0 :(得分：0)
您以一个良好的开端
foreach ($json['Results'][0] as $k => $v){
if (!empty($v)) {
$results .= ($k).": ".($v).'<br />';
}
}
但是在开始输出输出之前，请尝试创建自己的数组
$data = array();
foreach ($json['Results'][0] as $k => $v){
if (!empty($v)) {
$data[$k] = $v;
}
}
然后，您可以花些时间回显所需的列表。 通过这种简单的方法，希望空白列表中排除的列表中您想要的字段非常低。然后，您必须对此做些事情。
echo 'Make: '. $data['Make'] . '<br>';
echo 'ModelYear: '. $data['ModelYear']. '<br>';
echo 'Model: '. $data['Model']. '<br>';
echo 'BodyClass: '. $data['BodyClass']. '<br>';
echo 'Doors: '. $data['Doors']. '<br>';
echo 'Series: '. $data['Series']. '<br>';
echo 'VehicleType: '. $data['VehicleType']. '<br>';
您还可以仅使用键和空白值手动构建所需的数据数组，然后允许您的foreach填充它。然后，您可以使用另一个Forech来打印数据阵列，因为它会按您期望的顺序进行。
只是一个建议。希望它可以帮助您在过程中更进一步。
答案 1 :(得分：0)
我建议使用“主”数组来过滤和准备按类别分组的数据。有关更多说明，请参见内联注释：
代码：（Demo）
您的主阵列：
$master = [
"General" => [
"Make" => "",
"ModelYear" => "",
"Model" => "",
"BodyClass" => "",
"Doors" => "",
"Series" => "",
"VehicleType" => ""
],
"Safety" => [
"AirBagLocCurtain" => "",
"AirBagLocFront" => "",
"AirBagLocSide" => "",
"SeatBeltsAll" => ""
],
"Engine" => [
"DisplacementCC" => "",
"DisplacementCI" => "",
"DisplacementL" => "",
"EngineCylinders" => "",
"EngineHP" => "",
"EngineKW" => "",
"EngineManufacturer" => "",
"EngineModel" => "",
"TransmissionStyle" => "",
"OtherEngineInfo" => "",
"FuelTypePrimary" => "",
"FuelTypeSecondary" => ""
],
"Factory" => [
"Manufacturer" => "",
"ManufacturerId" => "",
"PlantCity" => "",
"PlantCountry" => ""
],
"Other" => [
"ErrorCode" => "",
"TPMS" => ""
]
];
处理：
foreach ($master as $category => &$items) { // allow modification of $master data with &
foreach ($items as $k => &$v) { // allow modification of $master data with &
if (isset($json['Results'][0][$k]) && strlen($json['Results'][0][$k])) { // only bother to process/display desired keys and non-empty values
$new = $json['Results'][0][$k];
if ($k == "DisplacementCC") {
$v = "Engine Displacement 2: $new cc's";
} elseif ($k == "DisplacementCI") {
$v = "Engine Displacement 3: $new ci's";
} elseif ($k == "DisplacementL") {
$v = "Engine Displacement 1: " . round($new, 1) . " liters";
} elseif ($k == "EngineKW") {
$v = "Kilowatts: $new kw";
} elseif ($k == "EngineManufacturer") {
$v = "Engine Manufacturer: $new";
} elseif ($k == "EngineModel") {
$v = "Engine Model: $new";
} elseif ($k == "FuelTypePrimary") {
$v = "Primary Fuel Type: $new";
} elseif ($k == "FuelTypeSecondary") {
$v = "Secondary Fuel Type: $new";
} elseif ($k == "EngineHP") {
$v = "Horsepower: $new hp";
} elseif ($k == "EngineCylinders") {
$v = "Engine Size: $new cylinders";
} else {
$v = "$k: $new";
}
} else {
unset($master[$category][$k]); // remove unwanted element from master
}
}
}
unset($items, $v); // just as a precaution to eliminate the referenced variables
echo "<div id=\"VIN\">{$json['Results'][0]['VIN']}</div>\n\n";
// now iterate the updated $master multi-dimensional array and only display the "good stuff"
foreach ($master as $category => $items) {
if (!empty($items)) { // only display categories & rows of data when the category holds 1 or more values
echo "<div class=\"group\">$category -</ br>";
foreach ($items as $v) {
echo "<div class=\"row\">$v</div>";
}
echo "</div>";
}
}
输出：
<div id="VIN">WAUBFAFL6FA058452</div>
<div class="group">General -</ br>
<div class="row">Make: AUDI</div>
<div class="row">ModelYear: 2015</div>
<div class="row">Model: A4</div>
<div class="row">BodyClass: Sedan/Saloon</div>
<div class="row">Doors: 4</div>
<div class="row">Series: Premium quattro</div>
<div class="row">VehicleType: PASSENGER CAR</div>
</div>
<div class="group">Safety -</ br>
<div class="row">AirBagLocCurtain: All Rows</div>
<div class="row">AirBagLocFront: 1st Row (Driver & Passenger)</div>
<div class="row">AirBagLocSide: 1st Row (Driver & Passenger)</div>
<div class="row">SeatBeltsAll: Manual</div>
</div>
<div class="group">Engine -</ br>
<div class="row">Engine Displacement 2: 1984 cc's</div>
<div class="row">Engine Displacement 3: 121.071108283 ci's</div>
<div class="row">Engine Displacement 1: 2 liters</div>
<div class="row">Engine Size: 4 cylinders</div>
<div class="row">Horsepower: 220 hp</div>
<div class="row">Kilowatts: 164.0540 kw</div>
<div class="row">Engine Manufacturer: Audi</div>
<div class="row">Engine Model: Flex Fuel Capable engine</div>
<div class="row">TransmissionStyle: Automatic</div>
<div class="row">OtherEngineInfo: Fuel: Gas (50-St); Federal / California Emission Standard: BIN 5 / ULEV II; Emissions Certification Test Group: FVGAV02.0AUB / FVGAJ02.0AUF E85</div>
<div class="row">Primary Fuel Type: Gasoline</div>
<div class="row">Secondary Fuel Type: Ethanol (E85)</div>
</div>
<div class="group">Factory -</ br>
<div class="row">Manufacturer: AUDI</div>
<div class="row">ManufacturerId: 1149</div>
<div class="row">PlantCity: Ingolstadt</div>
<div class="row">PlantCountry: Germany</div>
</div>
<div class="group">Other -</ br>
<div class="row">ErrorCode: 0 - VIN decoded clean. Check Digit (9th position) is correct</div>
<div class="row">TPMS: Indirect</div>
</div>
*请注意，只有在您知道永远不会使用!empty()作为有效值的情况下，才可以使用isset()而不是strlen()，然后使用0。 empty()会将0误认为是“ falsy” /“ empty”值，并默默地要求从主数组中删除该元素。