Funktion für ACF um ein Post in Frontend zu erzeugen

acf_save_post_front-end.php

<?php 
function videoproduzent_pre_save_post( $post_id )
{
    // check if this is to be a new post
    if( $post_id != 'new' )
    {
        return $post_id;
    }

	
    // Create a new post
    $post = array(
        'post_status'  => 'draft' ,
        'post_title'  => $_POST['acf']['field_5434172d1d00f'],
        'post_type'  => 'videoproduzenten' ,
    );  
	
	
    // insert the post
    $post_id = wp_insert_post( $post );
	
	
	// update custom Taxonomy (bundesland)
	$terms = $_POST['acf']['field_5437aa29f0857'];
	$terms = vo_bundesland_langeform($terms);
	
	/*
	if (!function_exists("preprint")) {
      function preprint($s, $return=false) {
          $x = "<pre>";
          $x .= print_r($s, 1);
          $x .= "</pre>";
          if ($return) return $x;
          else print $x;
      }
    }

	preprint($terms);
	die();
	*/

	wp_set_object_terms( $post_id, $terms, 'bundesland');

	
    // update $_POST['return']
    $_POST['return'] = add_query_arg( array('post_id' => $post_id), $_POST['return'] ); 

	
	// return the new ID
    return $post_id;

}
add_filter('acf/pre_save_post' , 'videoproduzent_pre_save_post' );
?>

conditional_bundesland_staedte.php

<?php
function vo_bundesland_langeform($bundesland) {
	switch( $bundesland ) {
		case 'bw':
			return 'Baden-Württemberg';
			break;
		
		case 'by':
			return 'Bayern';
			break;
			
		case 'be':
			return 'Berlin';
			break;
			
		case 'bb':
			return 'Brandenburg';
			break;
			
		case 'hb':
			return 'Bremen';
			break;
			
		case 'hh':
			return 'Hamburg';
			break;
			
		case 'he':
			return 'Hessen';
			break;
			
		case 'mv':
			return 'Mecklenburg-Vorpommern';
			break;
			
		case 'ni':
			return 'Niedersachsen';
			break;
			
		case 'nw':
			return 'Nordrhein-Westfalen';
			break;
			
		case 'rp':
			return 'Rheinland-Pfalz';
			break;
			
		case 'sl':
			return 'Saarland';
			break;
			
		case 'sn':
			return 'Sachsen';
			break;
			
		case 'st':
			return 'Sachsen-Anhalt';
			break;
			
		case 'sh':
			return 'Schleswig-Holstein';
			break;
			
		case 'th':
			return 'Thüringen';
			break;
	}
}
?>

Ja so funktioniert mit return