I'm working on a Bubble Chart using Highcharts. Here's a sample of my data:
name | price | quantity | count
--------+-------+----------+-------
Female | 2 | 3 | 5
Female | 3 | 12 | 10
Female | 5 | 6 | 15
Female | 1 | 7 | 25
Male | 3 | 5 | 7
Male | 2 | 9 | 11
Male | 5 | 7 | 23
Male | 4 | 4 | 14
I'm using PHP to query the data and encode to JSON:
$query = "SELECT name, price, quantity, count FROM sales WHERE id = $1";
$result = pg_prepare($db, "report", $query);
$result = pg_execute($db, "report", array($ID));
while ($row = pg_fetch_array($result, NULL, PGSQL_ASSOC))
{
$response['xdata'][$row['name']]['x'][] = $row['price'];
$response['xdata'][$row['name']]['y'][] = $row['quantity'];
$response['xdata'][$row['name']]['radius'][] = $row['count'];
}
echo json_encode($response);
However, the desired JSON format is as follows in order to properly plot the graph :
series: [{
name: 'Female',
marker:{
symbol:'circle',
fillColor:'rgba(24,90,169,.5)',
lineColor:'rgba(24,90,169,.75)',
lineWidth:1,
color:'rgba(24,90,169,1)',
states:{
hover:{
enabled:false
}
}
},
data: [{x:2,y:3,marker:{radius:5}},
{x:3,y:12,marker:{radius:10}},
{x:5,y:6,marker:{radius:15}},
{x:1,y:7,marker:{radius:25}}]
},{
name: 'Male',
marker:{
symbol:'circle',
fillColor:'rgba(238,46,47,.5)',
lineColor:'rgba(238,46,47,.75)',
lineWidth:1,
color:'rgba(238,46,47,1)',
states:{
hover:{
enabled:false
}
}
},
data: [{x:3,y:5,marker:{radius:7}},
{x:2,y:9,marker:{radius:11}},
{x:5,y:7,marker:{radius:23}},
{x:4,y:4,marker:{radius:14}}]
}]
My question is, how can I correctly process $query
in PHP to get the desired JSON format as above and pass it to series
through something like optionsBubble.series = data.xdata
? Thanks a lot!
You'd first have to build the non-db-related parts into your PHP structure, eg
$data = array(
0 => array(
'name' => 'Female',
'marker' => array (
'symbol': 'circle'
etc....),
'data' => array() // database insertion occurs here
),
1 => array(
'name' => 'Male',
etc...
)
);
$locations = array('Female' => 0, 'Male' => 1, etc...) // reverse map your 'name' fields
while(...) {
$data[$locations[$row['name']]][data]['x'][] = $row['price'];
$data[$locations[$row['name']]][data]['y'][] = $row['quantity'];
^^^^^^^^^^^^^^^^^^^^^^^^--- reverse lookup to get right array index for 'name'
}
First I'm going to recommend you take a look at your SQL query, especially the part of WHERE id=$1
. If I'm not mistaken (and on this I'm fairly sure.) your query is going to return one (1) row not many like what you probably want. I would recommend removing the WHERE
clause and see if that solves your problem.
If not drop me a line and I'll see what else I see and we can go from there.
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