PHP warning array_column() and array_search() [closed] - php

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show display nothing from cart menu sidebar when first i click on add to cart.
show display from cart menu sidebar when second i click on add to cart.
URL: https://www.bellastudio.pk/new/products.php?p_slug=olive-green
when i ty to start the add to cart i get this error:
PHP Warning: array_column() expects parameter 1 to be array, null given in
PHP Warning: array_search() expects parameter 2 to be array, null given in
i don't know how to make'it work, some help is appreciated. I'm new with this.
PHP
try {
if(isset($_POST['product_name']))
{
$name = $_POST['product_name'];
}
if(isset($_POST['product_price']))
{
$price = $_POST['product_price'];
}
if(isset($_POST['product_itemno']))
{
$itemno = $_POST['product_itemno'];
}
if(isset($_POST['product_quantity']))
{
$qty = $_POST['product_quantity'];
}
if(isset($_POST['product_color']))
{
$color = $_POST['product_color'];
}
if(isset($_POST['product_size']))
{
$size = $_POST['product_size'];
}
if(isset($_POST['sleeves']))
{
$sleeves = $_POST['sleeves'];
}
if(isset($_POST['neck']))
{
$neck = $_POST['neck'];
}
$stockitemno = $itemno.'-'.$size;
$host = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$host->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $host->prepare( "SELECT * FROM productstock INNER JOIN product ON product.p_id = productstock.pid INNER JOIN productsize ON productsize.sid = productstock.size_id WHERE product.p_itemno = :itemno AND productsize.sname = :size" );
$stmt->bindValue( ':itemno', $itemno );
$stmt->bindValue( ':size', $size );
$stmt->execute();
while ( $row = $stmt->fetch( PDO::FETCH_ASSOC ) ) {
// Current stock quantity
$stockqty = $row[ 'stockqty' ];
// No stock, bail early
if ( !$stockqty ) {
echo '<p>No available stock for that item.</p>';
}
// User didn't provide a quantity value
else if ( !$qty ) {
echo '<p>Please enter a quantity</p>';
}
// Lets add to the cart
else {
// Find product in cart
$cartindex = array_search( $stockitemno, array_column( $_SESSION[ 'cart' ], 'stockitemno' ) );
// Product info
$product = null;
// If already exists in cart
if ( $cartindex !== false ) {
$product = $_SESSION[ 'cart' ][ $cartindex ];
}
// Does not exit in cart, create new product info
else {
$product = [
'name' => $name,
'price' => $price,
'item_no' => $itemno,
'qty' => 0, // Default to none added
'color' => $color,
'size' => $size,
'stockitemno' => $stockitemno,
'sleeves' => $sleeves,
'neck' => $neck,
'stockqty' => $stockqty
];
}
// Track how many items were able to be added to the cart
$totaladded = 0;
// If users full amount is available
if ( ( $product[ 'qty' ] + $qty ) <= $stockqty ) {
$totaladded = $qty;
}
// Else add all available stock
else if ( $stockqty - $product[ 'qty' ] ) {
$totaladded = ( $stockqty - $product[ 'qty' ] );
}
// If we were able to add new items to cart
if ( $totaladded ) {
// Update product new qty
$product[ 'qty' ] += $totaladded;
// Update cart item
if ( $cartindex !== false ) {
$_SESSION[ 'cart' ][ $cartindex ] = $product;
}
// Add new item to cart
else {
$_SESSION[ 'cart' ][] = $product;
}
// Example: 5 item (size) were successfully added to your shopping cart.
printf( '<p><strong>%d</strong> %s (%s)<br>was successfully added to your shopping cart.</p>', $totaladded, $name, $size );
} else {
echo '<p>Not enough stock</p>';
}
}
}
} catch ( PDOException $e ) {
echo 'Error: ' . $e->getMessage();
}
$host = null;
$cart_count = count( $_SESSION[ 'cart' ] );
AJAX
$(document).ready(function()
{
load_cart_data();
function load_cart_data()
{
$.ajax({
url:"asset/includes/fetch_cart1.php",
method:"POST",
success:function(data)
{
$('.cart_details').html(data);
$('.badge1').text(data.total_item);
}
});
}
$(document).on('click','#add_to_cart',function (e) {
var cart_count = $('.navbar-tool-badge').text();
cart_count = parseInt(cart_count);
if($('input[type=radio][name=size]:checked').length == 0)
{
$('.msg').html('Please choose size.');
return false;
} else {
var product_name = $('#hidden-name').val();
var product_price = $('#hidden-price').val();
var product_itemno = $('#itemno').val();
var product_quantity = $('.quantity').val();
var product_color = $('#color').val();
var product_size = $("input[name='size']:checked").val();
var sleeves = $('#sleeves').val();
var neck = $('#neck').val();
e.preventDefault();
$.ajax
({
type: "POST",
url: "asset/includes/insertcart.php",
data:{product_name:product_name, product_price:product_price, product_itemno:product_itemno , product_quantity:product_quantity, product_color:product_color, product_size:product_size, sleeves:sleeves, neck:neck},
cache: false,
success: function(response)
{
load_cart_data();
$("#getCode").html(response);
$("#myModal").modal('show');
// remove cart count
$('.navbar-tool-badge').html(cart_count + 1);
}
});
}
});
$(document).on('click', '.delete', function(){
var item_no = $(this).attr("id");
var cart_count = $('.navbar-tool-badge').text();
cart_count = parseInt(cart_count);
$.ajax({
url:"asset/includes/delete_item.php",
method:"POST",
data:{item_no:item_no},
success:function(data)
{
if(data){
load_cart_data();
$('#cart-popover').popover('hide');
}
// remove cart count
$('.navbar-tool-badge').html(cart_count - 1);
}
})
});
});

Answer 1

at the first attempt, your $_SESSION[ 'cart' ] might be empty and hence you are getting an error. try to validate for empty cart and then do a search like this
if(!empty($_SESSION[ 'cart' ])){
$cartindex = array_search( $stockitemno, array_column( $_SESSION[ 'cart' ], 'stockitemno' ) );
}