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functions.php file or via a plugin that allows custom functions to be added, such as the Code snippets plugin. Avoid adding custom code directly to your parent theme’s functions.php file as this will be wiped entirely when you update the theme.
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| /** | |
| * Automatically add product to cart on visit | |
| */ | |
| add_action( 'template_redirect', 'add_product_to_cart' ); | |
| function add_product_to_cart() { | |
| if ( ! is_admin() ) { | |
| $product_id = 64; //replace with your own product id | |
| $found = false; | |
| //check if product already in cart | |
| if ( sizeof( WC()->cart->get_cart() ) > 0 ) { | |
| foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) { | |
| $_product = $values['data']; | |
| if ( $_product->get_id() == $product_id ) | |
| $found = true; | |
| } | |
| // if product not found, add it | |
| if ( ! $found ) | |
| WC()->cart->add_to_cart( $product_id ); | |
| } else { | |
| // if no products in cart, add it | |
| WC()->cart->add_to_cart( $product_id ); | |
| } | |
| } | |
| } |