Pulling data from MySQL into json array - php

Question

I'm trying to pull data from my database using json in php. I have a few elements I need to specific then to post them on a page.
I want to "fetch" the data from mysql and return it to a json_encode. How can I do this using the SELECT method. Some had used PDO methods and other have used mysql_assoc, which confuses me.
For instance,
I have rows of: 'id' , 'title' , 'start', 'backgroundColor'...etc. along with a default value for all of them. ($array[] = "someValue = default")
I want it to export like so:
array(
'id' => 1,
'title' => "someTitle",
'start' => "2012-04-16",
'backgroundColor' => "blue",
'someValue' = > "default",
...
), ....
));
If anyone could help me with this with the best detail, I'd be awesome!

Answer 1

If you wanted to do this with PDO then here is an example:
<?php
$dbh = new PDO("mysql:host=localhost;dbname=DBNAME", $username, $password);
$sql = "SELECT `id`, `title`, `time`, `start`, `backgroundColor`
FROM my_table";
$result = $dbh->query($sql)->fetchAll(PDO::FETCH_ASSOC);
//To output as-is json data result
//header('Content-type: application/json');
//echo json_encode($result);
//Or if you need to edit/manipulate the result before output
$return = [];
foreach ($result as $row) {
$return[] = [
'id' => $row['id'],
'title' => $row['title'],
'start' => $row['start'].' '.$row['time'],
'backgroundColor' => $row['backgroundColor']
];
}
$dbh = null;
header('Content-type: application/json');
echo json_encode($return);
?>

Answer 2

You don't "fetch to a json array".
You fetch your database results into a PHP array, then convert that php array, AFTER THE FETCHING IS COMPLETED, to a json string.
e.g.
$data = array();
while ($row = mysql_fetch_assoc($results)) {
$data[] = $row;
}
echo json_encode($data);

Answer 3

You can get the result from mysql,then format it to json
$array = array();
while($row = mysqli_fetch_array($result))
{
array_push($array,$row);
}
$json_array = json_encode($array);

Answer 4

Please check for SELECT methods here
In general it would look like this
$data = array(); // result variable
$i=0
$query = "SELECT id,title,start,backgroundColor FROM my_table"; // query with SELECT
$result = mysql_query($query);
while($row = mysql_fetch_assoc($result)){ // iterate over results
$data['item'][$i]['id'] = $row['id']; // rest similarly
...
...
$i++;
}
header('Content-type: application/json'); // display result JSON format
echo json_encode(array(
'success' => true,
'data' => $data // this is your data variable
));