multidimensional Array php - php

Question

I am trying to build multidimensional to get json but its getting little complex. Sure there is easier way to do this. Here is my code.
$rows = array();
$idx = 0;
$sql = "SELECT products, GROUP_CONCAT(title,',' ,price SEPARATOR ', ' ) prods FROM mylist GROUP BY products";
$query = mysqli_query($con, $sql);
while($row = mysqli_fetch_assoc($query)){
$rows[$idx]['products'] = $row['products'];
$title = explode(',',$row['prods']);
$rows[$idx]['prods'] = $title;
$idx++;
};
echo '<pre>' . var_export($rows, true) . '</pre>';
echo json_encode($rows);
It give me this result
array (
0 =>
array (
'prods' =>
array (
0 => 'title 4',
1 => '4',
2 => ' title 1',
3 => '1',
),
),
1 =>
array (
'prods' =>
array (
0 => 'title 2',
1 => '21',
),
),
2 =>
array (
'prods' =>
array (
0 => 'title 3',
1 => '3',
),
),
)
[{"prods":["title 4","4"," title 1","1"]},{"prods":["title 2","21"]},{"prods":["title 3","3"]}]
But I want like this
array (
0 =>
array (
'prods' =>
array (
array(title => 'title 4', price => '4'),
array(title => ' title 1', price => '1'),
),
),
1 =>
array (
'prods' =>
array (
array(title => 'title 2', price => '21'),
),
),
2 =>
array (
'prods' =>
array (
array(title => 'title 3', price => '3'),
),
),
)
[
{
"prods": [
{
"title": "title 4",
"price": "4"
},
{
"title": "title1",
"price": "1"
}
]
},
{
"prods": [
{
"title": "title2",
"price": "21"
}
]
},
{
"prods": [
{
"title": "title3",
"price": "3"
}
]
}
]
So, not sure how to mix the exploded data on array to get the right json encoded.

Answer 1

You can do a foreach on the $title array and if the key is even then build the output array with the desired keys. In the below I edited to substituted your db query for json so that the full example can be included without the sql query.
$rows = array();
$idx = 0;
$data = json_decode('[{"products":"the product", "prods":"title 4,4,title 1,1"},{"products":"the product", "prods":"title 2,21"},{"products":"the product", "prods":"title 3,3"}]', true);
foreach ($data as $row)
{
$rows[$idx]['products'] = $row['products'];
$title = explode(',',$row['prods']);
foreach ($title as $k => $v) {
// check if even
if ($k % 2 == 0) $rows[$idx]['prods'][] = array('title' => $v, 'price' => $title[$k+1]);
}
$idx++;
};
echo '<pre>' . var_export($rows, true) . '</pre>';
echo json_encode($rows);
Will output the following
array (
0 =>
array (
'products' => 'the product',
'prods' =>
array (
0 => array ('title' => 'title 4','price' => '4'),
1 => array ('title' => 'title 1','price' => '1'),
),
),
1 =>
array (
'products' => 'the product',
'prods' =>
array (
0 => array ('title' => 'title 2','price' => '21'),
),
),
2 =>
array (
'products' => 'the product',
'prods' =>
array (
0 => array ('title' => 'title 3','price' => '3'),
),
),
)

Answer 2

Based on Tristan earlier suggestion, I was able to get the expected result with below code, not sure if that's the best way.
$rows = array();
$idx = 0;
$sql = "SELECT products, GROUP_CONCAT(title,',',price SEPARATOR ';') prods FROM mylist GROUP BY products";
$query = mysqli_query($con, $sql);
while($row = mysqli_fetch_assoc($query)){
$prods = explode(';',$row['prods']);
foreach ($prods as $key => $value) {
$expValue = explode(',',$value);
$rows[$idx]['prods'][] = array('title' => $expValue[0], 'price' => $expValue[1]);
};
$idx++;
};
echo '<pre>' . var_export($rows, true) . '</pre>';
echo json_encode($rows);