woocommerce挂钩警告“找不到功能”

Question

I wanted to use hooks in my woocommerce single product page to do some changes.

So I added the following code into my function.php in my child-theme:

add_action( 'woocommerce_single_product_summary',' woocommerce_template_single_add_to_cart', 35 );

Now there should be a second add-to-cart button on my product page. But all I get is the following warning:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ' woocommerce_template_single_add_to_cart' not found or invalid function name in /home/userXXX/htdocs/vintagehome/wp-includes/class-wp-hook.php on line 298

You guys are my last chance to get this thing done! Please help me..

Greets Alex

Answer 1

// define the woocommerce_single_product_summary callback 
function action_woocommerce_single_product_summary( $woocommerce_template_single_title, $int ) { 
    // make action magic happen here... 
}; 

// add the action 
add_action( 'woocommerce_single_product_summary', 'action_woocommerce_single_product_summary', 10, 2 );