我正在努力从远程服务器接收JSON格式的数据并将其保存到数据库中。远程服务器每隔一分钟更新一次数据。
我编写了一个JavaScript程序，该程序从远程服务器接收jason数据。现在的问题是我无法将此数据传递到PHP文件以保存在数据库中。
我在stackoverflow上的同一线程上尝试了该解决方案，但到目前为止这些都行不通。
我正在尝试打印从php中的js接收的数据，以查找是否接收到数据。我编写的代码可以运行，但是什么也没有发生。按F12键时没有错误。
这是我的代码。我在做什么错了。
编辑
我发现的另一个问题是它没有打印回显。这意味着如果我尝试简单地回显“ test” ;，它不会打印任何内容。我在下面添加完整的代码，以查看如何/在何处使用echo打印结果。为什么回声不打印？
Javascript：
<script>
var humArray = [];
var temArray = [];
var N = 24;
for (i = 0; i < N; i++) {
humArray.push(0);
temArray.push(0);
}
function loadChart() { //fetches json data & calls dspChart() to render graph
var wData, hum, tem;
var requestURL = 'https://cors.io/?http://api.holfuy.com/live/?s=759&pw=h1u5l4kka&m=JSON&tu=C&su=m/s'; //URL of the JSON data
var request = new XMLHttpRequest({
mozSystem: true
}); // create http request
request.onreadystatechange = function() {
if (request.readyState == 4 && request.status == 200) {
wData = JSON.parse(request.responseText);
hum = wData.humidity;
tem = wData.temperature;
humArray.shift();
humArray.push(hum);
temArray.shift();
temArray.push(tem);
//dspChrt(humArray, temArray);
$.ajax({
url: 'index.php',
type: 'GET',
data: { temArray : temArray, humArray : humArray },
success: function (data) {
console.log( data );
},
error: function (data) {
console.log(data);
},
});
}
}
request.open('GET', requestURL);
request.send(); // send the request
//dspChrt(hum);
}
var myVar = setInterval(loadChart, 60000);
</script>
index.PHP
<?php
if (isset($_GET['data']))
{
$WData = $_GET['data'];
$Humidity = data.humArray;
$Temprature = data.temArray;
echo "Hum".$Humidity."Temp".$Temprature;
}
?>
完整代码
<div class="container">
<div class="row">
<div class="col-sm" style="background-color: #FFFFFF">
<h2 style="color:#B93B8F;">Data from JS</h2>
<?php
$servername = "localhost";
$username = "postgres";
$password = "test123";
$dbname = "testDB";
class TableRows extends RecursiveIteratorIterator {
function __construct($it) {
parent::__construct($it, self::LEAVES_ONLY);
}
function current() {
return "<td style='width:150px;border:1px solid grey;'>" . parent::current(). "</td>";
}
function beginChildren() {
echo "<tr>";
}
function endChildren() {
echo "</tr>" . "\n";
}
}
?>
</div>
<?php
if (isset($_GET['data']))
{
$WData = $_GET['data'];
$Humidity = $WData.humArray;
$Temprature = $WData.temArray;
echo "Hum".$Humidity."Temp".$Temprature;
}
?>
<h2>JS Update</h2>
<div>
<canvas id="myChart"></canvas>
</div>
<div class="col-sm" style="background-color: #FFFFFF">
<?php
echo "<h3>WeatherData</h3>";
echo "<table class='table table-hover table-bordered table-reponsive'>";
echo "<thead class='table-dark'>";
echo "<tr><th>humidity</th><th>temprature</th></tr>";
try {
$conn = new PDO("pgsql:host=$servername;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $conn->prepare("SELECT humidity, temprature FROM weatherdata");
$stmt->execute();
// set the resulting array to associative
$result = $stmt->setFetchMode(PDO::FETCH_ASSOC);
foreach(new TableRows(new RecursiveArrayIterator($stmt->fetchAll())) as $k=>$v) {
echo $v;
}
}
catch(PDOException $e) {
echo "Error: " . $e->getMessage();
}
echo "</thead'>";
echo "</table>";
?>
<div id="form">
<div id="login">
<form action="" method="post">
<input type="text" name="humidity" id="humidity" required="required" placeholder="Enter humidity"/>
<input type="text" name="temprature" id="monikulmio_gps" required="required" placeholder="Enter temprature"/>
<input type="submit" value="Insert" name="submit12"/><br />
</form>
<hr/>
</div>
<?php
if(isset($_POST["submit12"])){
try {
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // <== add this line
$sql = "INSERT INTO weatherdata (humidity, temprature)
VALUES ('".$_POST["humidity"]."','".$_POST["temprature"]."')";
echo "<meta http-equiv='refresh' content='0'>";
if ($conn->query($sql)) {
echo "<script type= 'text/javascript'>alert('New Record Inserted Successfully');</script>";
}
else{
echo "<script type= 'text/javascript'>alert('Data not successfully Inserted.');</script>";
}
$dbh = null;
}
catch(PDOException $e)
{
echo $e->getMessage();
}
}
$conn = null;
?>
</div>
</div>
</div>
</div>
</div>
</body>
答案 0 :(得分：1)
在您的PHP中，您正在检查isset $_GET['data']是否存在，但它总是会失败。您不发送数据，而是发送temArray和humArray。因此在$_GET['humArray']或$_GET['temArray']
因此您的代码将是：
<?php
if (isset($_GET['humArray'])){
$Humidity = $_GET['humArray'];
$Temprature = $_GET['temArray'];
echo "Hum".$Humidity."Temp".$Temprature;
}
?>
我还假设：
如果这些是数组，则需要执行操作（而不是使用echo）：
print_r($Humidity);
print_r($Temprature);
答案 1 :(得分：0)
尝试将您的代码分成至少两个文件：
使用以下命令更新您的JavaScript代码：
$.when( $.ajax({
type: 'POST',
url: 'fetchWeatherRequest.php',
dataType: 'json'
})
).then( function( response ) {
// Code so render results on index.php;
});
fetchWeatherRequest.php：
<?php
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://cors.io/?http://api.holfuy.com/live/?s=759&pw=h1u5l4kka&m=JSON&tu=C&su=m/s",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => array(
"Cache-Control: no-cache"
),
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
// Here code to save $response into database;
echo $response;
}