WC_Cart::find_product_in_cart() │ public │ WC 1.0

Check if product is in the cart and return cart item key.

Cart item key will be unique based on the item and its properties, such as variations.

Method of the class: WC_Cart{}

No Hooks.

Return

String. cart item key

Usage

$WC_Cart = new WC_Cart();
$WC_Cart->find_product_in_cart( $cart_id );
$cart_id(mixed)
id of product to find in the cart.
Default: false

WC_Cart::find_product_in_cart() code WC 9.5.1

woocommerce/includes/class-wc-cart.php 
public function find_product_in_cart( $cart_id = false ) {
	if ( false !== $cart_id ) {
		if ( is_array( $this->cart_contents ) && isset( $this->cart_contents[ $cart_id ] ) ) {
			return $cart_id;
		}
	}
	return '';
}