insert in to multi dimensional array in php for loop

Question

Below given is my array structure

Array
(
[0] => Array
    (
        [product_id] => 59
        [product_name] => Samsung Champ DUOS E2652 
        [product_price] => 4439
        [sub_cat_name] => Samsung
        [sub_cat_url] => samsung
        [image] => samsung-champ-duos-e2652---1414801404364308.jpg
        [currency] => ₹
    )

[1] => Array
    (
        [product_id] => 195
        [product_name] => Samsung Galaxy Tab 4 7.0
        [product_price] => 17847
        [sub_cat_name] => Samsung
        [sub_cat_url] => samsung
        [image] => galaxy-tab-4-7-0---1715601405057269.png
        [currency] => ₹
    )

[2] => Array
    (
        [product_id] => 284
        [product_name] => Samsung Galaxy Tab 3 Lite 7.0
        [product_price] => 18000
        [sub_cat_name] => Samsung
        [sub_cat_url] => samsung
        [image] => galaxy-tab-3-lite-7-0---1590061405576878.png
        [currency] => ₹
    )

[3] => Array
    (
        [product_id] => 19
        [product_name] => Samsung Galaxy Star
        [product_price] => 4833
        [sub_cat_name] => Samsung
        [sub_cat_url] => samsung
        [image] => feature-img144811404109906.jpg
        [currency] => ₹
    )

[4] => Array
    (
        [product_id] => 186
        [product_name] => Samsung Galaxy S5 Active
        [product_price] => 31922
        [sub_cat_name] => Samsung
        [sub_cat_url] => samsung
        [image] => galaxy-s5-active368091404989896.png
        [currency] => ₹
    )

)

i would like to based on sub_cat_url like below 基于sub_cat_url 进行

array
(
[0] => samsung
   [0] => Array
    (
        [product_id] => 186
        [product_name] => Samsung Galaxy S5 Active
        [product_price] => 31922
        [sub_cat_name] => Samsung
        [sub_cat_url] => samsung
        [image] => galaxy-s5-active368091404989896.png
        [currency] => ₹
    )
    [1] => Array
    (
        [product_id] => 284
        [product_name] => Samsung Galaxy Tab 3 Lite 7.0
        [product_price] => 18000
        [sub_cat_name] => Samsung
        [sub_cat_url] => samsung
        [image] => galaxy-tab-3-lite-7-0---1590061405576878.png
        [currency] => ₹
    )
)

for thet I wrote a code like below.

for($i = 0; $i < $count; $i++){
            if($i == 0){
                $search_array[$i] = $search_data[$i]["sub_cat_name"];
                $search_array[$i] = $search_data[$i]["product_name"];
                $j += 1;
            }
            else if($search_data[$i]["sub_cat_url"] !== $search_data[$i]["sub_cat_url"]){
                $search_array[$i] = array($search_data[$i]["sub_cat_name"]);
                $search_array[$i] = array($search_data[$i]["product_name"]);
                $j += 1;
            }
            else if($search_data[$i]["sub_cat_url"] === $search_data[$i]["sub_cat_url"]){
                $search_array[$i] = array($search_data[$i]["product_name"]);
                $j += 1;
            }
        }

but it didn't work well. And I tried using inner for loop also. It too didn't give me the actual result. Can some one please hlp me to write the correct loop statement for this? Thank you in advance

Answer 1

If I understood you well this should work:

$out = array();

$map = array();

foreach ($array as $k => $v) {
   $url = $v['sub_cat_url'];

   if (!isset($map[$url])) {
     $map[$url] = count($out);
   }
   $out[$map[$url]][$url][$k] = $v; // or $out[$map[$url]][$url][] = $v;

}

However I haven't tested it (you haven't provided data in PHP format)