Getting Data from Database for HighCHarts - php

Question

I am developing a tool which has a statistic page on which I am using HighCharts, I am using the basic line chart, Now to populate this chart I need some data. The data comes from my DB.
I got a query which extracts a list of users assigned to a particular 'Manager', Now I want each name to appear a s different line.
But What happens is that all names appear under one line........
My code:
<?php
session_start();
class ManagerStats{
public function con()
{
require_once('connect.php');
$DB = new dbConnect();
return $DB->connect();
}
public function DontEvenKnow(){
if($_SESSION['user'] == 'manager1#gmail.com'){
$sql = "SELECT user_id, first_name FROM tbl_user WHERE user_team='bob'";
$query = mysqli_query($this->con(), $sql);
if($query){
foreach($query as $v){
echo $v;
}
}
}elseif($_SESSION['user'] == 'manager2#gmail.com'){
//$sql = "SELECT user_id FROM tbl_user WHERE user_team='oli'";
}
}
}
?>
<script>
$(function () {
$('#home_manager').highcharts({
title: {
text: '',
x: -20 //center
},
xAxis: {
categories: ['04/19', '04/20', '04/21', '04/22', '04/23', '04/24']
},
yAxis: {
title: {
text: 'Emails Sent'
},
plotLines: [
{
value: 0,
width: 1,
color: '#808080'
}
]
},
tooltip: {
valueSuffix: ''
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'middle',
borderWidth: 0
},
series: [
{
name: '<?php $oko = new ManagerStats(); $oko->DontEvenKnow(); ?>',
data: [38, 78, 12, 80, 75]
},
{
name: 'Helena',
data: [23, 34, 55, 67, 34]
},
{
name: 'Martin',
data: [34, 35, 55, 69, 67]
},
{
name: 'Marta',
data: [43, 64, 75, 57, 64]
},
{
name: 'Samuel',
data: [63, 64, 75, 87, 44]
},
{
name: 'Carter',
data: [43, 54, 55, 67, 84]
}
]
});
});
</script>

Answer 1

In your function :
$data = "";
$data_for_user = "[43, 54, 55, 67, 84]";
//For each user you need to get data from database,
//but don't do a query inside a loop because it kills perfomance
foreach($query as $v){
$data .= " {
name: '".$v["first_name" ]."',
data: ".$data_for_user."
}, ";
}
echo $data;
then in series
series: [<?php $oko = new ManagerStats(); $oko->DontEvenKnow(); ?>]
This will do a new line on highcharts foreach user that you have
UPDATE: was missing one of the quotes on the array that might be why it wasn't working for the person if they just copied it.
UPDATE:
Getting data for more users for highcharts
You need a query with users and all his values that have to be in the graph:
$query = "SELECT t.user_id, t.first_name, group_concat( v.values ) as data_for_user
FROM tbl_user t,tbl_values v
WHERE t.user_id = v.user_id
GROUP by t.user_id";
Group concat get the values for user separated by comma the way you need for highcharts.
Remember that group_concat have a lenght limit of 1024 but you can change it with this before your query.
'SET GLOBAL group_concat_max_len=15000'
And data for highcharts
$data = "";
foreach($query as $v){
$data .= " {
name: '".$v["first_name" ]."',
data: [".$v["data_for_user"]."]
}, ";
}

Answer 2

Try adding a line break after you echo out the variable. Something like this:
echo $v . "<br />";
That should create a new line after each user.