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PHP code snippet – How to create auto select total amount after adding quantity and price in jquery and mysql?

<?php
$cartItem = $shoppingCart->getMemberCartItem($member_id);
if (! empty($cartItem)) {
    $item_quantity = 0;
    $item_price = 0;
    if (! empty($cartItem)) {
        foreach ($cartItem as $item) {
            $item_quantity = $item_quantity + $item["quantity"];
            $item_price = $item_price + ($item["price"] * $item["quantity"]);
        }
    }
}
?>
    <div id="shopping-cart">
        <div class="txt-heading">
            <div class="txt-heading-label">Shopping Cart</div>

            <a id="btnEmpty" href="index.php?action=empty"><img
                src="empty-cart.png" alt="empty-cart" title="Empty Cart"
                class="float-right" /></a>
            <div class="cart-status">
                <div>Total Quantity: <?php echo $item_quantity; ?></div>
                <div>Total Price: <?php echo $item_price; ?></div>
            </div>
        </div>
<?php
if (! empty($cartItem)) {
    ?>
<div class="shopping-cart-table">
            <div class="cart-item-container header">
                <div class="cart-info title">Title</div>
                <div class="cart-info">Quantity</div>
                <div class="cart-info price">Price</div>
            </div>
<?php
    foreach ($cartItem as $item) {
        ?>
				<div class="cart-item-container">
                <div class="cart-info title">
                    <?php echo $item["name"]; ?>
                </div>

                <div class="cart-info quantity">
                    <div class="btn-increment-decrement" onClick="decrement_quantity(<?php echo $item["cart_id"]; ?>)">-</div><input class="input-quantity"
                        id="input-quantity-<?php echo $item["cart_id"]; ?>" value="<?php echo $item["quantity"]; ?>"><div class="btn-increment-decrement"
                        onClick="increment_quantity(<?php echo $item["cart_id"]; ?>)">+</div>
                </div>

                <div class="cart-info price">
                        <?php echo "$".$item["price"]; ?>
                    </div>


                <div class="cart-info action">
                    <a
                        href="index.php?action=remove&id=<?php echo $item["cart_id"]; ?>"
                        class="btnRemoveAction"><img
                        src="icon-delete.png" alt="icon-delete"
                        title="Remove Item" /></a>
                </div>
            </div>
				<?php
    }
    ?>
</div>
  <?php
}
?>
</div>
<?php require_once "product-list.php"; ?>
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