Combine looping array PHP Codeigniter - php

Question

I have two arrays that are the results of two different database queries. I want to merge those two arrays fin the way I explain in the example below
This is the code that executes the first query:
$query = $this->db->query("SELECT kec,pilihan,COUNT(pilihan) as total FROM votes GROUP BY pilihan");
$someArray = [];
foreach($query->result_array() as $row){
array_push($someArray, [
'data' => $row['pilihan'],
'total' => $row['total'],
'location' => $row['kec'],
]);
}
This is the resulting array:
[
{
"data": "1",
"total": "2",
"location": "3524230"
},
{
"data": "2",
"total": "3",
"location": "3524230"
},
{
"data": "3",
"total": "1",
"location": "3524230"
}
]
This is the code that executes the second query:
$query = $this->db->query("SELECT * FROM owl_dptmaster GROUP BY kecamatan");
$someArray = [];
foreach($query->result_array() as $row){
array_push($someArray, [
'location' => $row['kecamatan']
]);
}
And the second array looks like this:
[
{
"location": "3524230"
},
{
"location": "3524240"
},
{
"location": "3524250"
},
{
"location": "3524260"
}
]
I want to merge those two arrays so that the result would be this array:
[
{
"location": "3524230",
"data1": "2",
"data2": "3",
"data3": "1"
},
{
"location": "3524240",
"data1": null,
"data2": null,
"data3": null
},
{
"location": "3524250",
"data1": null,
"data2": null,
"data3": null
},
{
"location": "3524260",
"data1": null,
"data2": null,
"data3": null
}
]
How can I achieve this?

Answer 1

Instead of combining arrays, you could do the summarizing in sql with sub queries. Assuming you're using mysql.
$query = $this->db->query(
"select owl.kecamatan,
(select count(pilihan) from votes where kec = owl.kecamatan and pilihan = 1) data1,
(select count(pilihan) from votes where kec = owl.kecamatan and pilihan = 2) data2,
(select count(pilihan) from votes where kec = owl.kecamatan and pilihan = 3) data3,
from owl_dptmaster owl
order by owl.kecamatan"
);
You could do this query and then build an array of "data" . $pilihan => $totalPilihan which you push into the $someArray when the $location changes.
$query = $this->db->query(
"select owl.kecamatan as location, v.pilihan
from owl_dptmaster owl
left join votes v
on owl.kecamatan = v.kec"
order by 1, 2);
You have a results set with all the locations and votes.
// Made of query results...
$query = [
[ "location" => "3524230", "pilihan" => "1" ],
[ "location" => "3524230", "pilihan" => "1" ],
[ "location" => "3524230", "pilihan" => "2" ],
[ "location" => "3524230", "pilihan" => "3" ],
[ "location" => "3524230", "pilihan" => "3" ],
[ "location" => "3524230", "pilihan" => "3" ],
[ "location" => "3524230", "pilihan" => "4" ],
[ "location" => "3524230", "pilihan" => "4" ],
[ "location" => "3524230", "pilihan" => "5" ],
[ "location" => "3524240", "pilihan" => null ],
[ "location" => "3524250", "pilihan" => null ],
[ "location" => "3524260", "pilihan" => null ],
[ "location" => "3524270", "pilihan" => "1" ],
[ "location" => "3524270", "pilihan" => "1" ],
[ "location" => "3524270", "pilihan" => "1" ],
[ "location" => "3524270", "pilihan" => "20" ],
[ "location" => "3524270", "pilihan" => "20" ],
[ "location" => "3524270", "pilihan" => "30" ]
];
And here's a procedural routine to build $someArray[].
$someArray = [];
$xRow = [];
$oldPilihan = '';
$total = 0;
$oldLocation = '';
foreach ($query as $row) {
//echo $row['location'] . " - " . $row['pilihan'] . '<br>';
$location = $row['location'];
$pilihan = $row['pilihan'];
if ($pilihan !== $oldPilihan) {
if (! empty($oldPilihan) ) {
$dataName = 'data' . $oldPilihan;
$xRow[] = array($dataName => $total);
}
$total = 1;
$oldPilihan = $pilihan;
} else {
$total++;
}
if ($location !== $oldLocation) {
if (! empty($oldLocation)) {
array_push($someArray, $xRow);
}
$xRow = [ 'location' => $location ];
$oldLocation = $location;
}
}
$dataName = 'data' . $oldPilihan;
$xRow[] = array($dataName => $total);
array_push($someArray, $xRow);
var_dump($someArray);