PHP update quantity in multidimensional array - php

Question

My array looks like the following:
Array
(
[0] => Array
(
[index] => 0
[quantity] => 1
[0] => Array
(
[id_product] => 20
[title] => Oranges
)
)
[1] => Array
(
[index] => 1
[quantity] => 1
[0] => Array
(
[id_product] => 24
[title] => Bananas
)
)
)
To make this array, this is my code:
$i = 0;
$content = array();
if(isset($_SESSION['cart'])){
foreach($_SESSION['cart'] as $result){
foreach($result as $item){
$values = $product->getById($item['id']);
if($values != null){ // which means it has product
/*
Checks if the array already contains that ID
this avoids duplicated products
*/
if(main::search_multidimensional($content, "id_product", $item['id_product']) == null){
$content[] = array("index" => $i, "quantity" => 1, $values);
$i++;
}else{ /*
in case it does have already the id_product in the array
I should update the "quantity" according to the "index".
*/
}
}
}
}
}
return $content;
My problem is after the }else{. I've been trying some codes without any success. I have to update the quantity according to the index. Although if you guys think there's a better alternative please let me know.
Edit: Since most of the people is worried about the search_multidimensional and it might be my solution, here's the function:
public function search_multidimensional($array, $key, $value){
$results = array();
if (is_array($array)) {
if (isset($array[$key]) && $array[$key] == $value) {
$results[] = $array;
}
foreach ($array as $subarray) {
$results = array_merge($results, self::search_multidimensional($subarray, $key, $value));
}
}
return $results;
}

Answer 1

EDIT 2:
In that case, would this help? (Since your search_multidimensional only returns a true or false)
$i = 0;
$content = array();
if(isset($_SESSION['cart'])){
foreach($_SESSION['cart'] as $result){
foreach($result as $item){
$values = $product->getById($item['id']);
if($values != null) { // which means it has product
/*
Checks if the array already contains that ID
this avoids duplicated products
*/
$product_exists = false;
foreach($content as &$cItem) {
if($cItem['values']['id_product'] == $item['id_product']) {
$cItem['values']['quantity']++; // Increments the quantity by 1
$product_exists = true;
break;
}
}
// If the product does not exist in $content, add it in.
if(!$product_exists)
$content[] = array("index" => $i, "quantity" => 1, "values" => $values);
$i++;
}
}
}
}
(Edited again to give an array key to $values)
OLD ANSWER:
Since you are recreating the cart array in $content, you could just do this in your else:
$content[] = array("index" => $i, "quantity" => $result['quantity'] + 1, $values);
Such that it would show like this:
$i = 0;
$content = array();
if(isset($_SESSION['cart'])){
foreach($_SESSION['cart'] as $result){
foreach($result as $item){
$values = $product->getById($item['id']);
if($values != null){ // which means it has product
/*
Checks if the array already contains that ID
this avoids duplicated products
*/
if(main::search_multidimensional($content, "id_product", $item['id_product']) == null)
$content[] = array("index" => $i, "quantity" => 1, $values);
else
$content[] = array("index" => $i, "quantity" => $result['quantity'] + 1, $values); // Retrieve current quantity and adds 1
$i++;
}
}
}
}
(I'm assuming you are only increasing the quantity by 1)

Answer 2

Solved.
All I had to do was to forget the $i variable, since it wasn't actually doing something necessary. Since I have id_product, which is unique I need to work with it.
if($values != null){ // Only if it has results
// checks if array already contains or not the product ID
// if does not have, it will add
if(global_::search_multidimensional($content, "id_product", $item['id_product']) == null){
$content[] = array("index" => $item['id_product'], "quantity" => 1, $values);
// index is now the id of the product
}else{
// otherwise, loop all the elements and add +1
foreach($content as $key => $result){
if($item['id_product'] == $content[$key]['index']){
$content[$key]['quantity']++;
}
}
}
}

Answer 3

As your $content array has fixed structure (fixed number of levels) you don't need to use recursive function. Your search_multidimensional function could be much simpler. And it should return index of found element (if any) in the array:
function search_multidimensional($array, $key, $value) {
foreach ($array as $i => $el) {
foreach ($el as $j => $v) {
if (is_int($j) && isset($v[$key]) && $v[$key] == $value) return $i;
}
}
return false;
}
So the snippet building $content should be changed like this:
...
if (($index = search_multidimensional($content, "id_product", $item['id_product'])) === false) {
$content[] = array("index" => $i, "quantity" => 1, $values); $i++;
}
else {
$content[$index]['quantity']++;
}