Contact Form 7 custom field values

cf7.php

<?php
/* 
   This goes in your functions.php or similar. It works the same for selects and radio buttons
   In this example, we will provide dynamic values for a select named 'example-field1' 
   CF7 form tag: [select example-field1]
*/


function mytheme_cf7_dynamic_values($tag){

   //make sure this is a field we want to modify - add more field names to the array to handle multiple fields
   if ( !in_array($tag['name'], array('example-field1')) )
        return $tag;

   switch($tag['name']){

       case 'example-field1': 
            //your custom value code goes here, eg getting titles of a custom post type named 'centre'
            $centres = get_posts(array(
                'post_type' => 'centre',
                'posts_per_page' => -1,
                'orderby' => 'title',
                'order' => 'ASC'
            ));

            if(empty($centres)) return $tag;

            foreach($centres as $centre){
                $tag['raw_values'][] = $centre->post_title;
                $tag['values'][] = $centre->post_title;
                $tag['labels'][] = $centre->post_title;
            }
       
            //print_r($tag);
       
       break;         
       
   }//switch
   
   return $tag;
  
}//mytheme_cf7_dynamic_values()
  
add_filter( 'wpcf7_form_tag', 'mytheme_cf7_dynamic_values', 10, 2);