functions.php

<?php

/**
 * If you are using shortcode, or auto output and do not have the full AND value wrapper being output (output as value only),
 * you can use this code below to use something different than the regular <br /> that is output by default
 */

add_filter('field_editor_output_no_wrap_after', 'smyles_custom_no_wrap_after', 10, 6);

function smyles_custom_no_wrap_after( $output, $meta_key, $listing_id, $field_values, $args, $single_value ){
  
  // Array indexes start at 0, to get the last we need to minus 1 from total
  $last_value_index = ( count( $field_values ) - 1 );
  // Get where our current value output is at
  $current_index = array_search( $single_value, $field_values);
  
  // Return empty string if this is the last value
  if( $last_value_index === $current_index ){
	return '';	
  }
  
  // Return ", and " for second to last value
  if( $current_index === ( $last_value_index -1 ) ){
	return ', and ';
  }
  
  // Return comma instead of <br /> for "job_region" meta key
  if( $meta_key === 'job_region' ){
	return ', ';
  }
  
  // OR check for taxonomy and output comma
  if( array_key_exists( 'taxonomy', $args ) && $args['taxonomy'] === 'job_listing_region' ){
	return ', ';
  }
  
  return $output;
}