How to check if which hook triggered the call to a function?

Question

I have a situation where I have a function hooked to more than one custom hooks. How to check in the callback function which custom hook triggered the call?

Or the question in code will be

add_action('my_test_hook_1','my_test_callback_function');
add_action('my_test_hook_2','my_test_callback_function');
add_action('my_test_hook_3','my_test_callback_function');
add_action('my_test_hook_4','my_test_callback_function');

function my_test_callback_function(){

    $called_action_hook = ; //Some magic code that will return current called action the hook

    echo "This function is called by action: " . $called_action_hook ;

}

Answer 1

I found the magic code you need.

Use current_filter(). This function will return name of the current filter or action.

add_action('my_test_hook_1','my_test_callback_function');
add_action('my_test_hook_2','my_test_callback_function');
add_action('my_test_hook_3','my_test_callback_function');
add_action('my_test_hook_4','my_test_callback_function');

function my_test_callback_function(){

    $called_action_hook = current_filter(); // ***The magic code that will return the last called action

    echo "This function is called by action: " . $called_action_hook ;

}

For reference: https://developer.wordpress.org/reference/functions/current_filter/

Answer 2

The solution will be to add a parameter to do_action and then pick that up in your add_action function:

add_action('my_test_hook_1','my_test_callback_function');
add_action('my_test_hook_2','my_test_callback_function');
add_action('my_test_hook_3','my_test_callback_function');
add_action('my_test_hook_4','my_test_callback_function');

function my_test_callback_function( $called_action_hook ){
    echo "This function is called by action: " . $called_action_hook ;
}

do_action('my_test_hook_1','my_test_hook_1');
do_action('my_test_hook_2','my_test_hook_2');
etc.