fetch value in multidimensional associative array? - php

Question

I have a SESSION array $_SESSION['cart']
for example it has value as
Array
(
[0] =>
[1] => Array
(
[item_id] => 1420
[item_qty] => 1
)
[2] => Array
(
[item_id] => 1522
[item_qty] => 1
)
)
Now let's say I have item_id = 1420
now I want to increase the item_qty for item_id = 1420 and also I have to set it in that SESSION array.
What I tried it :
foreach($_SESSION['Cartquantity'] as $key => $d)
{
if(isset($d)) {
if($d['item_id'] == $_GET['item_id'])
{
$d['item_quntity'] = $d['item_quantity']+1;
}
}
else{
}
}
It's not working ?

Answer 1

You're iterating over $_SESSION['Cartquantity'] but have told us that the array is stored in $_SESSION['cart'].
Also, this:
$d['tem_quntity'] = $d['item_quantity']+1;
Should be:
$d['item_qty'] = $d['item_qty']+1;
Finally, you'll need to make $d a reference by prepending an ampersand (&) to it in the foreach condition.
foreach($_SESSION['cart'] as $key => &$d)
{
if($d) {
if($d['item_id'] == $_GET['item_id'])
{
$d['item_qty'] = $d['item_qty']+1;
}
}
else{
}
}

Answer 2

Use reference &$d
foreach($_SESSION['Cartquantity'] as $key => &$d)
{
if($d) {
if($d['item_id'] == $_GET['item_id'])
{
$d['tem_quntity'] = $d['item_quantity']+1;
}
}
else{
}
}
or
foreach($_SESSION['Cartquantity'] as $key => $d)
{
if($d) {
if($d['item_id'] == $_GET['item_id'])
{
$_SESSION['Cartquantity'][$key]['item_quntity'] = $d['item_quantity']+1;
}
}
else{
}
}

Answer 3

change this
$d['tem_quntity'] = $d['item_quantity']+1;
to
$d['item_qty'] = $d['item_qty']+1;

Answer 4

you can call by
foreach ($_SESSION['Cartquantity'] as $value))
{
if(isset($value))
{
if($value['item_id'] == $_GET['item_id'])
{
$value['item_quntity'] = $value['item_quantity']+1;
}
}
else
{
}
}

Answer 5

Try to check for !empty($array)
if(!empty($d))
because it array so you need to check for if its do not have any elements inside of it.
If you want to know if the array is defined , then use isset($d).
If you want to know if a particular key is defined, use isset($d['item_id']).
If you want to know if an array has not empty and has key value pairs , use !empty($d).

Answer 6

use it:
foreach($_SESSION['cart'] as $key => $d)
{
if($d) {
if($d['item_id'] == $_GET['item_id'])
{
$d['tem_quntity'] = $d['item_qty']+1;
}
}
else{
}
}

Answer 7

foreach($_SESSION['cart'] as $key=>$val)
{
foreach($val as $subK)
{
if($_GET["item_id"]==$subk["item_id"])
{
$_SESSION['cart'][$key]["item_id"]=$_SESSION['cart'][$key]["item_quantity"]+1;
}
}
}