I have a problem using flot to plot data from a database.
using json_encode in php I have tried to get the plot data but I have been unsuccessful.
Below is my code, kindly assist
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>`enter code here`
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Flot Examples</title>
<link href="./flot/layout.css" rel="stylesheet" type="text/css">
<!--[if lte IE 8]><script language="javascript" type="text/javascript" src="../excanvas.min.js"></script><![endif]-->
<script language="javascript" type="text/javascript" src="./flot/jquery.js"></script>
<script language="javascript" type="text/javascript" src="./flot/jquery.flot.js"></script>
</head>
<body>
<h1>Database Plotting</h1>
<div id="placeholder" style="width:600px;height:300px;"></div>
<?php
$server = "localhost";
$user="user";
$password="password";
$database = "database";
$connection = mysql_connect($server,$user,$password);
$db = mysql_select_db($database,$connection);
$query = "SELECT x_value, y_value FROM table";
$result = mysql_query($query);
while($row = mysql_fetch_assoc($result))
{
$dataset1[] = array($row['x_value'],$row['y_value']);
}
?>
<script type="text/javascript">
$(function () {
var dataset1 = <?php echo json_encode($dataset1,); ?>;
$.plot($("#placeholder"),[dataset1] );
});
</script>
</body>
</html>
The ouput from the json-encode dataset1 is thus the following [["1380111342","0"],["1380111679","0"],["1380112099","20"],["1380112109","300"],["1380112114","40"],["1380112120","56"],["1380112127","36"],["1380112132","40"],["1380112138","78"]]
Try change this line:
$.plot($("#placeholder"), [dataset1] );
To that:
$.plot($("#placeholder"), [JSON.parse(dataset1)]);
var dataset1 = <?php echo json_encode($dataset1,); ?>;
Lose the comma after "$dataset1" and the semi-colon at the end.
This should work just fine:
var dataset1 = <?php echo json_encode($dataset1); ?>
Related
I have been trying to make a graph plot with flot, and have ran into a problem.I Think the problem is with the way m using the php variable with flot Aside from that the graph isn't showing so I must have done something wrong. Below is the graph code:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Flot Examples</title>
<link href="layout.css" rel="stylesheet" type="text/css">
<!--[if lte IE 8]><script language="javascript" type="text/javascript" src="../excanvas.min.js"></script><![endif]-->
<script language="javascript" type="text/javascript" src="./flot/jquery.js"></script>
<script language="javascript" type="text/javascript" src="./flot/jquery.flot.js"></script>
<script language="javascript" type="text/javascript" src="./flot/jquery.flot.categories.js"></script>
</head>
<body>
<?php
//CONNECTING TO THE SERVER
$servername = "XXX";
$username = "YYY";
$password = "ZZZ";
conn = new mysqli($servername, $username, $password);
$sql = "SELECT NAME, AGE FROM pro_db";
$result = $conn->query($sql);
$wt=array();
if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
//storing the values in the array
$wt[]=$row;//is this the right way
}
} else {
echo "0 results";
}
?>
<div id="placeholder" style="width:600px;height:300px;"></div>
<script type="text/javascript">
$(function () {
//accessing the array
var data = <?php echo $wt; ?>;
$.plot($("#placeholder"), [data], {
series: {
bars: {
show: true,
barWidth: 0.6,
align: "center" }
},
xaxis: {
mode: "categories",
tickLength: 0
}
});
});
</script>
</body>
</html>``
Here's completely working example i made. If something doesn't work - there's some error with data. Try var_dump how your $wt array looks like in the end;
$data = [
['Andrew', 31],
['Helen', 29],
['Dasha', 24],
['Denis', 23]
];
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="canvas" style="width: 600px; height: 400px;"></div>
<script src="bower_components/jquery/dist/jquery.min.js"></script>
<script src="bower_components/flot/jquery.flot.js"></script>
<script src="bower_components/flot/jquery.flot.categories.js"></script>
<script>
var data = <?php echo json_encode($data) ?>;
$("#canvas").plot([data], {
series: {
bars: {
show: true,
barWidth: 0.6,
align: "center"
}
},
xaxis: {
mode: "categories",
tickLength: 0
}
});
</script>
</body>
</html>
I am pulling data from a mySql database using php to plot a graph using flot. The query works fine but no graph is being displayed when I run the code. A blank space is coming up where the graph should be. Here is what I have:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Flot Graph</title>
<link href="layout.css" rel="stylesheet" type="text/css">
<script language="javascript" type="text/javascript" src="../jquery.js"></script>
<script language="javascript" type="text/javascript" src="../jquery.flot.js"></script>
</head>
<body>
<h1>Flot Graph</h1>
<div id="placeholder" style="width:600px;height:300px;"></div>
<?php
$mysqli=new mysqli('localhost','root',"",'simpledb');
$sql="select name, age from `people` where age=23";
$results = $mysqli->query($sql);
if ($results)
{
while ($row=$results->fetch_assoc())
{
$dataset1[] = array($row['name'],$row['age']);
}
}
else
{
echo "Error";
}
?>
<script type="text/javascript">
var dataset1 = <?php echo json_encode($dataset1); ?>;
$(function ()
{
$.plot($("#placeholder"), [
{
data: dataset1,
bars: {show: true}
}
]);
});
</script>
</body>
</html>
It looks like your x values are strings, yet you haven't included the categories plugin.
Thanks everyone. I got it to work. I'm not sure what the problem was but it worked after I changed the javascript part to :
$(function ()
{
$.plot("#placeholder", [ dataset1 ], {
series: {
bars: {
show:true,
barWidth: 0.6,
align: "center"
}
},
xaxis: {
mode: "categories",
tickLength:0
}
});
});
I am pulling data from a MySQL database and plotting with Flot. My problem is in our DB design.
I have 1 table that contains the following columns:
ID (auto incremented) (key)
Timestamp
SensorData (looks like: 34534.3 32452.4 23454.6 6523.45 67546.4 2233)
I would like to parse out my sensor data so I can create Flot plots with individual sensor data. Right now, I am able to plot the ID vs Timestamp and that works. Here is my code:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Flot Examples</title>
<link href="layout.css" rel="stylesheet" type="text/css">
<!--[if lte IE 8]><script language="javascript" type="text/javascript" src="js/flot/excanvas.min.js"></script><![endif]-->
<script language="javascript" type="text/javascript" src="js/flot/jquery.js"></script>
<script language="javascript" type="text/javascript" src="js/flot/jquery.flot.js"></script>
</head>
<body>
<h1>Title</h1>
<div id="placeholder" style="width:600px;height:300px;"></div>
<?php
$server = "www.freesql.org";
$user="username";
$password="password";
$database = "database";
$connection = mysql_connect($server,$user,$password);
$db = mysql_select_db($database,$connection);
$query = "SELECT Id, localtme FROM varia";
$result = mysql_query($query);
while($row = mysql_fetch_assoc($result))
{
$dataset1[] = array($row['Id'],$row['localtme']);
}
?>
<script type="text/javascript">
$(function () {
var dataset1 = <?php echo json_encode($dataset1); ?>;
$.plot($("#placeholder"), [ dataset1 ]);
});
</script>
</body>
</html>
I was trying to create a notifications system for a website with the following code :
setInterval(function() {
$.post('notifications.php', {
email: 123
}, function(data) {
});
}, 30000);
And the notifications.php :
$userid = $_SESSION[username];
$notifications = array();
$sql = "SELECT appreciation FROM ms_notifications WHERE email = '$userid' AND new = '1'";
$res = mysql_query($sql) or die(mysql_error());
if (mysql_num_rows($res)) {
while ($r = mysql_fetch_object($res)) {
$notifications[] = $r->appreciation;
}
$nb_result = mysql_num_rows($res);
}
$sql = "UPDATE ms_notifications SET new = '0' WHERE email = '$userid'";
mysql_query($sql) or die(mysql_error());
echo $nb_result;
Problem is that, as I'm new to jquery/Js, I don't know how to put the result inside of a div. For now it stays on the top of the page, above everything.
I tried that, inside the data function but not working... :
$('#test_app').html(data);
I guess it's a very stupid question but help would be really appreciated ! Thank you very much.
UPDATE : Here the HTML Code
<?php
session_start();
include ('connection/database.php');
include ('login_script.php');
include ('notifications.php');
if($logged_in){
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>My Home</title>
</head>
<body>
<link rel="stylesheet" type="text/css" href="ms.css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/font_i/specimen_files/easytabs.js" type="text/javascript" charset="utf-8"></script>
<!-- FONT SCRIPT-->
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
$('#container').easyTabs({defaultContent:1});
});
</script>
<script type="text/javascript" charset="utf-8">
var scrollSpeed = 70; // Speed in milliseconds
var step = 1; // How many pixels to move per step
var current = 0; // The current pixel row
var imageHeight = 505; // Background image height
var headerHeight = 59; // How tall the header is.
//The pixel row where to start a new loop
var restartPosition = -(imageHeight - headerHeight);
function scrollBg(){
//Go to next pixel row.
current -= step;
//If at the end of the image, then go to the top.
if (current == restartPosition){
current = 0;
}
//Set the CSS of the header.
$('#main_logo').css("background-position","0 "+current+"px");
}
//Calls the scrolling function repeatedly
var init = setInterval("scrollBg()", scrollSpeed)
</script>
<!-- NOTIFICATIONS_SCRIPT !!!!!! -->
<script type="text/javascript" charset="utf-8">
setInterval(function() {
$.post('notifications.php', {
email: 123
}, function(data) {
});
}, 30000);
</script>
<style>
body{
font-family:SommetRoundedLight;
}
</style>
</head>
<body>
<div id="container">
<div id="header_contain">
<div id="test_app">
</div>
</div>
</div>
</body>
</html>
<?php }
else{
echo '<script language="javascript" type="text/javascript">
<!--
window.location.replace("connexion.php");
-->
</script>';
} ?>
Thanks again
Use .append() instead of .html()
Instead of
$('#test_app').html(data);
just use:
$('#test_app').html('<div>' + data + '</div>');
Seems to simple to be it. Am I missing something?
<code>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>jQuery.pager.js Test</title>
<link href="Pager.css" rel="stylesheet" type="text/css" />
<script src="jquery-1.2.6.min.js" type="text/javascript"></script>
<script src="jquery.pager.js" type="text/javascript"></script>
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$("#pager").pager({ pagenumber: 1, pagecount: 15, buttonClickCallback: PageClick });
});
PageClick = function(pageclickednumber) {
$("#pager").pager({ pagenumber: pageclickednumber, pagecount: 15, buttonClickCallback: PageClick });
$("#result").html("Clicked Page " + pageclickednumber);
}
</script>
</head>
<body>
$query = "select name from student";
$result = mysql_query(Query);
while($row=mysql_fetch_array($result)){
$student_name = $row['name'];
?>
<h1 id="result"><?php echo $student_name; ?></h1>
<? }
?>
<div id="pager" />
</body>
</html>
</code>
For my above code am not geting the student name , if i remove the pager script , the student name will appear, may i know , why, where i made mistake..
i thing i have to pass somthing to html() , but i am not sure..
while($row=mysql_fetch_array($result)){ $student_name = $row['name']; }
should be
$student_name = NULL;
while($row=mysql_fetch_array($result)){ $student_name .= $row['name']; }