PHP

woocommerce cart hooks

// These are actions you can unhook/remove!
 
add_action( 'woocommerce_before_cart', 'woocommerce_output_all_notices', 10 );
 
add_action( 'woocommerce_cart_collaterals', 'woocommerce_cross_sell_display' );3
add_action( 'woocommerce_cart_collaterals', 'woocommerce_cart_totals', 10 );
 
add_action( 'woocommerce_proceed_to_checkout', 'woocommerce_button_proceed_to_checkout', 20 );

woocommerce add to cart hook

add_action( 'woocommerce_add_to_cart', function ()
{
  // your code here
});

before add to cart hook woocommerce

function so_validate_add_cart_item( $passed, $product_id, $quantity, $variation_id = '', $variations= '' ) {

    // do your validation, if not met switch $passed to false
    if ( 1 != 2 ){
        $passed = false;
        wc_add_notice( __( 'You can not do that', 'textdomain' ), 'error' );
    }
    return $passed;

}
add_filter( 'woocommerce_add_to_cart_validation', 'so_validate_add_cart_item', 10, 5 );

before add to cart hook woocommerce

function so_validate_add_cart_item( $passed, $product_id, $quantity, $variation_id = '', $variations= '' ) {

    // do your validation, if not met switch $passed to false
    if ( 1 != 2 ){
        $passed = false;
        wc_add_notice( __( 'You can not do that', 'textdomain' ), 'error' );
    }
    return $passed;

}
add_filter( 'woocommerce_add_to_cart_validation', 'so_validate_add_cart_item', 10, 5 );

add to cart function woocommerce

// To change add to cart text on single product page
add_filter( 'woocommerce_product_single_add_to_cart_text', 'woocommerce_custom_single_add_to_cart_text' ); 
function woocommerce_custom_single_add_to_cart_text() {
    return __( 'Buy Now', 'woocommerce' ); 
}
// To change add to cart text on product archives(Collection) page
add_filter( 'woocommerce_product_add_to_cart_text', 'woocommerce_custom_product_add_to_cart_text' );  
function woocommerce_custom_product_add_to_cart_text() {
    return __( 'Buy Now', 'woocommerce' );
}