我正在尝试从JavaScript中的PHP脚本导入JSON数组。我正在使用xampp。
PHP代码：
<?php
// This script is meant to display the data from Insight sensors DB
include('includes/motebymote.html');
if ($_SERVER['REQUEST_METHOD'] == 'POST'){//Use the post method as a request method to the server
require('mysqli_connect.php');//Give information on which database to use
if(!empty($_COOKIE["mote_ID"]) || !empty($_COOKIE["std"]) || !empty($_COOKIE["end"])){
//Setting variables
$moteID=$_COOKIE["mote_ID"];
$start=$_COOKIE["std"];
$end=$_COOKIE["end"];
if(preg_match("/^[0-9]{4}-[0-9]{2}-[0-9]{2}$/", $start) || preg_match("/^[0-9]{4}-[0-9]{2}-[0-9]{2}$/", $end)) {
if(isset($moteID) && isset($start) && isset($end)){
//Building the query
$q="SELECT date_time, modality, value FROM sensor_data WHERE mote_id = $moteID and date_time BETWEEN '$start' and '$end'";
$r = @mysqli_query ($dbc, $q);//Doing the request
$numRow = mysqli_num_rows($r);
if ($r && $numRow>0){
//echo "<p>There are $numRow data points associated to mote$moteID</p><br>";
//echo"<table align ='center' width ='70%' cellpadding='4'><tr><th>Date&Time</th><th> Sensor Type</th><th> Value</th></tr>";
$moteArray = array();
while($data = mysqli_fetch_array($r, MYSQLI_BOTH)){
//echo "<tr align ='center'><td>" .$data['date_time']. "</td><td>" .$data['modality']. "</td><td>" .$data['value']. "</td></tr>";
$moteArray[] = $data;
}
//echo"</table>";
$JSONMoteArray = json_encode($moteArray);
echo $JSONMoteArray;
}
else if ($numRow==0){
echo "<h1>Sorry there are no data available</h1>
<p>There are no data available for mote$moteID</p>";
}
else{//Give an error message if the query fails
echo '<h1>System Error</h1>
<p class="error">We could not record your order due to a system error. We apologize for any inconvenience.</p>';
}
}
}
else {
echo "<h1> Wrong date format</h1>
<p>Please input the starting date in a yyyy-mm-dd format</p>";
}
}
else{
echo "<h1> Wrong input</h1>
<p> Please make sure that the mote is properly selected and that the start and end dates are entered in yyyy-mm-dd format</p>";
}
mysqli_close($dbc); //close the database
}
exit(); //exits the script
?>
<!DOCTYPE html>
<html lang="eng">
<head>
<meta charset="utf-8">
<title> Motes Data</title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script type="text/javascript" src="js/mote.js" async></script>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
</head>
<body><br>
<form action="motebymote.php" method="post">
<p>Please input a mote number: <input type="text" name="moteNo" id="moteNo"></p>
<p> Please input a starting date (yyyy-mm-dd):<input type="text" name="stDate" id="stDate"></p>
<p> Please input an end date (yyyy-mm-dd):<input type="text" name="endDate" id="endDate"></p>
<p><input type="submit" name="submit" value="submit" id="submit"/></p>
<p><input type="submit" name="display" value="display" id="display"/></p>
<div id="columnchart_material" style="width: 800px; height: 500px;"></div>
</form>
</body>
</html>
var but = document.getElementById("submit"); //Looking for the submit button
if(but){ //if the button is clicked activate the event listener
but.addEventListener("click", moteIDDate);
}
//This function goes to fetch the different values and store them with cookies //to allow motebymote.php to use them
function moteIDDate(){
var moteID = $('#moteNo').val();
document.cookie="mote_ID = " + moteID + ";time()+3600";
var start = $("#stDate").val();
document.cookie = "std="+start+";time() 3600";
var end = $("#endDate").val();
document.cookie= "end="+ end+";time() 3600";
};
var jsonData = $.ajax({
url: "http://localhost/Insight/mote2/motebymote.php",
type:"GET",
cache: false,
dataType: "json",
success: function(xhr){
console.log(xhr.responseText);
},
error: function(xhr){
console.log(xhr.responseText);
}
});
php代码具有"如果... == post"您的JavaScript Ajax呼叫正在发送" get"