<?php

   $args = array(
  \'public\'   => true,
    \'_builtin\' => false
 );

 $output = \'names\'; // names or objects, note names is the default
  $operator = \'and\'; // \'and\' or \'or\'

 $post_types = get_post_types( $args, $output, $operator ); 

 foreach ( $post_types  as $post_type ) {

     echo \'<p>\' . $post_type . \'</p>\';
 }

?>