Load mysql data to Highcharts line chart using JSON - php

Question

I'm trying to import my data from a database to a line chart (Highcharts). My code doesn't work.
Here is my PHP code:
<?php
require('../php/config.php');
$con=mysqli_connect("localhost", "root", "ginnastica", "progetto");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
if(isset($_GET['src']))
{
$records=array();
$records = select($mysqli,"SELECT Sesso AS name, Occupati AS data FROM occupazione WHERE Sesso='totale' AND Periodo LIKE '%2008'");
$rows = array();
$rows['name'] = 'Totale';
while($r = mysql_fetch_assoc($records)) {
$rows['data'][]=$r['data'];
}
return json_encode($rows);
}
else
return json_encode(array('status' => 'error', 'details' => 'no src provided'));
}
?>
It seems that "mysql_fetch_assoc" doesn't work. The output of my array $rows id that:
{
"name": "Totale"
}
There isn't an element called "data".
What am I doing wrong?

Answer 1

At first:
It would be worth to see what is in your ../php/config.php file, because the content of that file may impact the behavior of other lines you provided.
The structure and data (at least few lines of data) of occupazione table is also worth to see, because data or structure could change the output as well.
You are missing a { after the else, - as #Moppo already mentioned.
Warning on mysql_fetch_assoc
This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should be used. Read more in php.net
After that and some more fixes I would finally write your code in the way close to that:
<?php
$con = mysqli_connect("localhost", "root", "ginnastica", "progetto");
// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
if (isset($_GET['src'])) {
$records = $con->query("SELECT Sesso AS name, Occupati AS data FROM occupazione WHERE Sesso='totale' AND Periodo LIKE '%2008'");
$rows = array();
$rows['name'] = 'Totale';
while ($r = $records->fetch_assoc()) {
$rows['data'][] = $r['data'];
}
return json_encode($rows, JSON_NUMERIC_CHECK);
} else {
return json_encode(array('status' => 'error', 'details' => 'no src provided'));
}
As I said, we know nothing about database you work with, so my guess would be that your select returns no lines as a result. And then you got no data (only {"name": "Totale"}), just because while has nothing to iterate throw.