How to Use Array_Push on a Session Array in PHP

Can I use array_push on a SESSION array in php?

Yes, you can. But First argument should be an array.

So, you must do it this way

$_SESSION['names'] = array();
array_push($_SESSION['names'],$name);

Personally I never use array_push as I see no sense in this function. And I just use

$_SESSION['names'][] = $name;

How to push multiple values to a session array

The issue you are having is that it is re-declaring $_SESSION['name'] as a new array every time this code is run.

I suggest using something along the lines of:

<?php
    session_start();

    if(isset($_GET['title']) && $_GET['title'] !== ""){
        if(!isset($_SESSION['name']) && !is_array($_SESSION['name'])){
            $_SESSION['name'] = array();
        }

        array_push($_SESSION['name'], $_GET['title']);
    }
?>

This does your previous check of seeing if $_GET['title'] is set, but then does another check to ensure if $_SESSION['name'] exists and is an array. If it's not an array it declares it.
The last thing it does is add your value to the array.

array_push pushes to many items in my session array PHP

your original php is correct just make script like this in the javascript

function addToChart(deze) {
var addToCartProductArr=[];
const brandContainer = deze.parentNode;
const productName = brandContainer.children[0].innerHTML;

addToCartProductArr.push(productName);

$.ajax({
url: "addToCart.php",
method: "POST",
data: {arr:addToCartProductArr},

});
}

What we just do is that we init the array every time the function is called by :

 var addToCartProductArr=[];

php Post arrays in Session array

Either add the value to your array:

$_SESSION['answers'][] = $_POST;

or use array_push

array_push($_SESSION['answers'], $_POST);

You try to do to much at once :)

php session array add an element if same ID

Yes, you can.

You can do this by adding the value, while retrieving it from the database. For example:

while($res = $shipment->fetch_object()){
    $seller_id = $res->seller;
    $shipment_cost = $res->shipment_fee;

    foreach ($_SESSION['items'] as $key => $item) {
        if ($item['p_seller'] === $seller_id) {
            $_SESSION['items'][$key]['p_fee'] = $shipment_cost;
        }
    }
}

A better (faster) way is to create a mapping between the sellerId and costs, and afterwards put it in the session:

$costMapping = array();
while($res = $shipment->fetch_object()){
    $seller_id = $res->seller;
    $shipment_cost = $res->shipment_fee;

    $costMapping[$seller_id] = $shipment_cost;
}

foreach ($_SESSION['items'] as $key => $item) {
    if (isset($costMapping[$item['p_seller']])) {
        $_SESSION['items'][$key]['p_fee'] = $costMapping[$item['p_seller']];
    }
}

This way you only have 2 loops, whatever the amount of sellers is that you have.

How can I add new items to my session array if value is not already in it? PHP

You can use array_push():

if(empty($_SESSION['coupon'])){
   // Create array from session
   $_SESSION['coupon']['couponcode'] = array();
}
else
{
  if(!in_array( $coupon,$_SESSION['coupon']['couponcode'])) //check in array available
  {
    array_push($_SESSION['coupon']['couponcode'], $coupon); //push to array
  }
} 

Pushing an array to a session variable without re-instantiating the variable

You have to call session_start() before you reference $_SESSION. The output you posted indicates you don't do that.

Notice: Undefined variable: _SESSION in C:\inetpub\wwwroot\domain\store\cart.php on line 5

---

Related Topics