PHP in_array not working after loop in session-CodePudding

I have a foreach loop to check all array of ID and if using in_array to see if any of the arrays of IDsis equaled my $_POST['id'] as shown below:

$cart = array (
    'title' => $_POST['title'],
    'price' => $_POST['price'],
    'img_src' => $_POST['img_src'],
    'id' => $_POST['id'],
   
    );

foreach ($_SESSION['cart'] as $item) {
   $id = $item['id'];
}

if(in_array($_POST['id'], $id)){
    
    echo "ID exist";
    
}else{
    $_SESSION['cart'][] = $cart;
        $count = count($_SESSION["cart"]);

}

For some reason, it keeps adding even when the ID exist inside the list of arrays of IDs.

CodePudding user response：

You are just changing the value of $id inside foreach loop. Try to store value in array. Refer the below code:

$cart = array (
    'title' => $_POST['title'],
    'price' => $_POST['price'],
    'img_src' => $_POST['img_src'],
    'id' => $_POST['id'],
   
    );
$id = array();
foreach ($_SESSION['cart'] as $item) {
   $id[] = $item['id'];
}

if(in_array($_POST['id'], $id)){
    
    echo "ID exist";
    
}else{
    $_SESSION['cart'][] = $cart;
        $count = count($_SESSION["cart"]);

}