Output from mySql a two dimensional Json but with duplicates - php

Question

mySql outputs this:
As you can see row 3 and 4 has duplicates so I want to merge these duplicates when I output my Json. To be exact I want my json to be like this:
[
{
"name": "The Crane Bar",
"lat": "53.2692",
"lng": "-9.06151",
"events": [
{
"name": "Traditional music session",
"info": null
}
]
},
{
"name": "Taaffes Bar",
"lat": "53.2725",
"lng": "-9.05321",
"events": [
{
"name": "6 Nations, Italy VS Ireland",
"info": null
}
]
},
{
"name": "a house",
"lat": "37.4401",
"lng": "-122.143",
"events": [
{
"name": "Party at Palo Alto",
"info": "Some info about the party"
},
{
"name": "2gdfgdf",
"info": "2gdfgdfgdf"
}
]
}
]
You know use one one location_name, lat and lng and have nested the event_name and post_content (as info here).
Thanks!

Answer 1

Based on your comment, you want the results to be nested, so when you generate the JSON, iterate over the rows and build a nested result list in PHP:
$result = array();
$item = null;
for ($i = 0; $i < count($rows); ++$i) {
$row = $rows[$i];
if ($item === null) {
$item = array('location' => $row['location'], 'events' => array());
}
$item['events'][] = array('name' => $row['event_name']);
if ($i == count($rows) - 1 || $row['location'] != $rows[$i + 1]['location']) {
$result[] = $item;
$item = null;
}
}
echo json_encode($result); // JSON-encoded data
Now each location will have an events list with one or more entries.