Restructure array from sql query so that I can echo proper values - php

Question

I'm trying to get the content I need from a joined query and properly use values as an array key so that I can build some DIV lists properly
My php query and array:
$getTickers = "
SELECT d.ID as displayID, d.display_name as display, l.location_name as locationName, d.location_id as location, t.id as ticker, tc.id as contentID, tc.content
FROM displays d
INNER JOIN locations l on d.location_id = l.id
INNER JOIN tickers t on d.id = t.display_id
INNER JOIN ticker_content tc on t.id = tc.ticker_id;
";
$tickers = $mysqlConn->query($getTickers);
$tickerDisplays = array();
foreach($tickers as $subArray) {
if(!array_key_exists($subArray['displayID'], $tickerDisplays)) {
$tickerDisplays[$subArray['displayID']] = array();
}
// here you add `display_name` under key `display_id`
$tickerDisplays[$subArray['displayID']][$subArray['location']] = $subArray['display'];
}
All examples and code below, but I don't need the html structure help with this, just how to restructure the array/key to give me the desired results and how I should loop them on the front end.
I'm getting 4 divs as I expect right now (one for each unique display/location)
but I need to figure out how to correcty arrange it so I can echo the DIsplay name as the h4, the location as h5, and then each content in my list
So the query result gives me this:
displayID | display | locationName | location | ticker | contentID | content |
1 Office Building 4 4 1 1 testing content
2 Lobby Building 4 4 2 2 testing content 2
3 Lobby Building 1 1 3 3 testing content 3
4 Office Building 1 1 4 4 testing content 4
4 Office Building 1 1 4 5 testing content again
I'm trying to loop on this with the expected result of having a a div for each location/display combo like so:
OFFICE
Building 4
testing content
---------------
LOBBY
Building 4
testing content 2
------------------
LOBBY
Building 1
testing content 3
------------------
OFFICE
Building 1
testing content 4
testing content again
----------------------
Here's the way I'm currently trying to loop that
<?php foreach($tickerDisplays as $key => $ticker):?>
<h4><?php echo $key ?></h4> //so this should be the display Name (office, lobby)
<h5><?php echo //location?></h5> //this should be the location name (Building 1, Building 4)
//This will be another foreach for any content associated with the location/display
<ul class="tickerContent">
<li>
</ul>
</div>
</div>
<?php endforeach;?>

Answer 1

The approach here is to make a child array for each display line to contain all
the multiple content records.
// Dummy the data from the query
$tickers = [
['displayID' => 1, 'display' => 'Office', 'locationName' => 'Building 4', 'location' => 4, 'ticker' => 1, 'contentID' => 1, 'content' => 'testing content'],
['displayID' => 2, 'display' => 'Lobby', 'locationName' => 'Building 4', 'location' => 4, 'ticker' => 2, 'contentID' => 2, 'content' => 'testing content 2'],
['displayID' => 3, 'display' => 'Lobby', 'locationName' => 'Building 1', 'location' => 1, 'ticker' => 3, 'contentID' => 3, 'content' => 'testing content 3'],
['displayID' => 4, 'display' => 'Office', 'locationName' => 'Building 1', 'location' => 1, 'ticker' => 4, 'contentID' => 4, 'content' => 'testing content 4'],
['displayID' => 4, 'display' => 'Office', 'locationName' => 'Building 1', 'location' => 1, 'ticker' => 4, 'contentID' => 5, 'content' => 'testing content again']
];
// A place to keep the reorganized data
$tickerDisplays = [];
// Walk through the query result
foreach($tickers as $row) {
$displayID = $row['displayID']; // for convenience and readability
$location = $row['location']; // for convenience and readability
$display = $row['display'];
$contentID = $row['contentID'];
if ( ! array_key_exists($row['displayID'], $tickerDisplays) ) {
$tickerDisplays[$displayID] = [
'displayID' => $row['displayID'],
'display' => $row['display'],
'ticker' => $row['ticker'],
'contentID' => $row['contentID'],
'content' => $row['content'],
'location' => $row['location'],
'locationName' => $row['locationName'],
'#content' => [] // to store the content data
];
}
$tickerDisplays[$displayID]['#content'][$contentID] = ['content' => $row['content']];
}
print_r($tickerDisplays);
foreach ( $tickerDisplays as $key => $ticker ) {
// Output the display and location name
out($ticker['display']);
out($ticker['locationName']);
// Output all the content records.
foreach ( $ticker['#content'] as $contentID => $content ) {
out($content['content']);
}
out('------------');
}
// Just a utility function
function out($msg) {
echo "$msg\n";
}
Output:
Office
Building 4
testing content
------------
Lobby
Building 4
testing content 2
------------
Lobby
Building 1
testing content 3
------------
Office
Building 1
testing content 4
testing content again
------------