Diving into a new project and trying to teach myself JSON,PHP,MySQL and Morris.js.
Some background into what I am trying to achieve.
I have a PHP file that goes out to a webpage and grabs JSON data. (Right now I just have it set to grab everything). Then with the data that it grabs it puts it into a mysql database. I have set a Cron job up right now to run this file every 1 minute, so that I can get some data flowing into this database.
<?php
//connect to mysql db
$con = mysql_connect('localhost','user','password',"") or die('Could not connect: ' . mysql_error());
//connect to the database
mysql_select_db('database', $con);
//read the json file contents
$jsondata = file_get_contents('http://192.168.10.243/j');
//convert json object to php associative array
$data = json_decode($jsondata, true);
//get the device details
$id = $data['data']['id'];
$type = $data['data']['type'];
$detector = $data['data']['detector'];
$cpm = $data['data']['cpm'];
$temperature = $data['data']['temperature'];
$uptime = $data['data']['uptime'];
//insert into mysql table
$sql = "INSERT INTO database_table_1(id, type, detector, cpm, temperature, uptime)
VALUES('$id', '$type', '$detector', '$cpm', '$temperature', '$uptime')";
if(!mysql_query($sql,$con))
{
die('Error : ' . mysql_error());
}
?>
After this, I then use PHP again to parse the information out of MySQL into a JSON array. Right now it will parse all the MySQL data it has (which I'm not sure if this is a good thing right now or if I should figure out a way to just parse the most recent data from MySQL.) Let me know what you think.
<?php
//open connection to mysql db
$connection = mysqli_connect('localhost','user','password','database_table_1') or die("Error " . mysqli_error($connection));
//fetch table rows from mysql db
$sql = "select * from database_table_1";
$result = mysqli_query($connection, $sql) or die("Error in Selecting " . mysqli_error($connection));
//create an array
$emparray[] = array();
while($row =mysqli_fetch_assoc($result))
{
array_push(
$emparray,
array(
'a' => $row['timestamp'],
'w' => $row['id'],
'x' => $row['cpm'],
'y' => $row['temperature'],
'Z' => $row['uptime']
)
);
}
// $emparray[] = $row;
echo json_encode($emparray);
//close the db connection
mysqli_close($connection);
?>
Now if I was to run this PHP file by itself manually I would receive a lot of JSON data formatted just like this.
[{"a":"2015-08-17 21:34:01","w":"110000","x":"16","y":"28","Z":"112094"}]
Now my plan is to have this information update a chart or charts on a webpage using the morris.js charts. Here is my current index.html page with the PHP script and morris.js sections being near the bottom.
<!DOCTYPE html>
<html lang="en">
<!-- morris.js dependencies -->
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.css">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.min.js"></script>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>Chart V0.1</title>
<!-- Bootstrap Core CSS -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- Custom CSS -->
<link href="css/simple-sidebar.css" rel="stylesheet">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div id="wrapper">
<!-- Sidebar -->
<div id="sidebar-wrapper">
<ul class="sidebar-nav">
<li class="sidebar-brand">
<a href="#">
Start Bootstrap
</a>
</li>
<li>
<a href="#">Dashboard</a>
</li>
</ul>
</div>
<!-- /#sidebar-wrapper -->
<!-- Page Content -->
<div id="page-content-wrapper">
<div id="myfirstchart" style="height: 300px;"></div>
<div class="container-fluid">
<div class="row">
<div class="col-lg-12">
<h1>Simple Sidebar</h1>
<p> This template has a responsive menu toggling system.</p>
<a href="#menu-toggle" class="btn btn-default" id="menu-toggle">Toggle Menu</a>
</div>
</div>
</div>
</div>
<!-- /#page-content-wrapper -->
</div>
<!-- /#wrapper -->
<!-- PHP from Mysql to Json array -->
<?php
//open connection to mysql db
$connection = mysqli_connect('localhost','user','password','database_table_1') or die("Error " . mysqli_error($connection));
//fetch table rows from mysql db
$sql = "select * from database_table_1";
$result = mysqli_query($connection, $sql) or die("Error in Selecting " . mysqli_error($connection));
//create an array
$emparray[] = array();
while($row =mysqli_fetch_assoc($result))
{
array_push(
$emparray,
array(
'a' => $row['timestamp'],
'w' => $row['id'],
'x' => $row['cpm'],
'y' => $row['temperature'],
'Z' => $row['uptime']
)
);
}
// $emparray[] = $row;
echo json_encode($emparray);
//close the db connection
mysqli_close($connection);
?>
<!-- Json Pull -->
<script>
Morris.Area({
// ID of the element in which to draw the chart.
element: 'myfirstchart',
// Chart data records -- each entry in this array corresponds to a point on the chart.
data: <?php echo json_encode($emparray);?>,
// The name of the data record attribute that contains x-values.
xkey: 'a',
// A list of names of data record attributes that contain y-values.
ykeys: ['x'],
// Labels for the ykeys -- will be displayed when you hover over the chart.
labels: ['x-test']
});
</script>
<!-- jQuery -->
<script src="js/jquery.js"></script>
<!-- Bootstrap Core JavaScript -->
<script src="js/bootstrap.min.js"></script>
<!-- Menu Toggle Script -->
<script>
$("#menu-toggle").click(function(e) {
e.preventDefault();
$("#wrapper").toggleClass("toggled");
});
</script>
So far I have figure most of this new project, though I am currently stumped on how to take the data that I can parse from my PHP script and feed it to a morris.js chart or charts. I would like to have it so the chart or charts will update themselves every 1 minute for now and that the morris.js charts will get their data from my PHP script.
Any help, ideas, links, or best practices would help out a lot. My coding experience is little to none so I do apologize in advance.
Thank you
UPDATE:
I migrated the PHP script out of the HTML page and tried calling the PHP results via $.getJSON in the HTML page. Though I still am not able to get morris.js to use the parsed data. I dont even get a chart Any ideas?
<!-- Ajax -->
<script>
$.getJSON('export_php_test_1.php', function( data ){
Morris.Area({
// ID of the element in which to draw the chart.
element: 'myfirstchart',
// Chart data records -- each entry in this array corresponds to a point on the chart.
data: data,
// The name of the data record attribute that contains x-values.
xkey: 'a',
// A list of names of data record attributes that contain y-values.
ykeys: 'x',
// Labels for the ykeys -- will be displayed when you hover over the chart.
labels: 'x-test'
});
});
</script>
