[SOLVED][Drupal Errors] A function got declared inside of another function

Here is the solution.

• Obviously this error occurred when a function go declared inside another function as shown in the sample code below.
  

  function listing_form_alter($form_id, &$form){
    if($form_id == 'listing_node_form'){
      //do stuff
    }
  
  function listing_form(){
  //do stuff
  }//end listing_form
  
  }//end listing_form_alter

• To fix it you need to move the function outside of the container function as shown below.
  

  function listing_form_alter($form_id, &$form){
    if($form_id == 'listing_node_form'){
     //do stuff
    }
  }//end listing_form_alter
  
  function listing_form(){
  //do stuff
  }//end listing_form

Hope that helps.