How to create add an array to a multidimensional array - php

Question

I'm trying to merge an array into another. If a business is a child of it's sector.
My aim is to create a array that looks like this:
[0] => Array (
[sector] => 198
[business] => Array (
[0] => 201
)
)
[1] => Array (
[sector] => 178
[business] => Array (
[0] => 181
[1] => 182
)
)
I currently have this:
[0] => Array (
[sector] => 198
)
[1] => Array (
[sector] => 178
)
and this (business ids):
Array
(
[0] => 201
)
Array
(
[0] => 181
[1] => 182
)
I need to nest these under sector.
This is what I have at the moment
$targets = array();
foreach ($taxonomy['sector'] as $sectorKey=>$sector) {
$getSectorTerm = get_term_by('slug', $sector, 'sector');
$getSectorId = $getSectorTerm->term_id;
$targets[] = array('sector'=>$getSectorId, 'business'=>[]);
foreach ($taxonomy['business'] as $keyBusiness=>$businesses) {
foreach ($businesses as $key => $business) {
$getBusinessTerm = get_term_by('slug', $business, 'sector');
$getBusinessId = $getBusinessTerm->term_id;
$getParentTerm = get_term( $getBusinessTerm, 'sector' );
$businessParentId = $getParentTerm->parent;
if ($businessParentId == $getSectorId) {
array_push($targets, $getBusinessId);
}
}
}
}
print_r($targets);
die;
The output is
Array
(
[0] => Array
(
[sector] => 198
)
[1] => 201
[2] => Array
(
[sector] => 178
)
[3] => 181
[4] => 182
)
Any help would be much appreciated.
Thanks

Answer 1

It should be work like this:-
$targets = array();
foreach ($taxonomy['sector'] as $sectorKey=>$sector) {
$getSectorTerm = get_term_by('slug', $sector, 'sector');
$getSectorId = $getSectorTerm->term_id;
$target_array = array('sector'=>$getSectorId, 'business'=>[]);
foreach ($taxonomy['business'] as $keyBusiness=>$businesses) {
foreach ($businesses as $key => $business) {
$getBusinessTerm = get_term_by('slug', $business, 'sector');
$getBusinessId = $getBusinessTerm->term_id;
$getParentTerm = get_term( $getBusinessTerm, 'sector' );
$businessParentId = $getParentTerm->parent;
if ($businessParentId == $getSectorId) {
$target_array['business'][] = $getBusinessId;
}
}
}
$targets[] = $target_array;
}
print_r($targets);
die;

Answer 2

If you'll keep current structure of array, it would be hard to populate the array with subarrays. It requires additional loop through the aray to find a certain sector value.
Are you able to change array structure to make it more compact and accessible? I mean that compact array has keys equal to sectors ID, and values are array of business IDs. For example like this:
[198] => Array (
[0] => 201
)
[178] => Array (
[0] => 181
[1] => 182
)
$targets = array();
foreach ($taxonomy['sector'] as $sectorKey=>$sector) {
$getSectorTerm = get_term_by('slug', $sector, 'sector');
$getSectorId = $getSectorTerm->term_id;
$targets[ $getSectorId ] = [];
foreach ($taxonomy['business'] as $keyBusiness=>$businesses) {
foreach ($businesses as $key => $business) {
$getBusinessTerm = get_term_by('slug', $business, 'sector');
$getBusinessId = $getBusinessTerm->term_id;
$getParentTerm = get_term( $getBusinessTerm, 'sector' );
$businessParentId = $getParentTerm->parent;
if ($businessParentId == $getSectorId) {
$targets[ $getSectorId ][] = $getBusinessId;
}
}
}
}
print_r($targets);
die;
To get a table:
foreach($targets as $sector => $businesses) {
echo "Sector ID: $sector<br>";
foreach( $businesses as $business ) {
echo "Business ID: $business<br>";
}
}