Wordpress问题创建菜单选项

I have created a Custom Setting API for web developing for a client. I was just creating first menu option on the WP dashboard.

But when I send file I get this error message saying --> :call_user_func_array() expects parameter 1 to be a valid callback, function ' allb_admin_page' not found or invalid function name in

function allb_admin_page() {

  add_menu_page( ' ALLB Theme Options', 'ALLB', 'manage_options', 'a-legacy-left-behind', 'allb_theme_create_page', 110);

}

add_action( 'admin_menu', ' allb_admin_page' );

function allb_theme_create_page() {
  // genration of our admin page
}

I was thinking this may be new update or this function that i am using might be removed from WordPress or i am doing something wrong please explain.

Can anyone help with this quick issue having on word press, please?

Thank you, Happy New Years!!!

Here is the answer..

Please try it once, Just copy and past this code..

function allb_admin_page() {
  add_menu_page('ALLB Theme Options', 'ALLB', 'manage_options', 'a-legacy-left-behind', 'allb_theme_create_page', 110);

}
add_action('admin_menu','allb_admin_page');

function allb_theme_create_page() {
  // genration of our admin page
}

I hope it'll help to you..

You need to remove the space:

add_action('admin_menu', 'allb_admin_page');