WordPress custom post with custom field

custom.php

<?php 
function ah_custom_posts() {
			//for slider
		    register_post_type('banner',array(
		      'public' => true,
		      'label'  => 'Banner',
		      'labels'  => array(
		      		'name' => 'Banner',
		      		'singular_name' => 'Banner',
		      		'add_new' => 'Add new banner',
		      ),
		      'supports' => array('title', 'editor', 'thumbnail', 'excerpt', 'custom-fields')
		    ));


		add_action( 'init', 'ah_custom_posts' );

?>

services.php

  <?php
   global $post;
   $number = 0;
   $args = array( 'posts_per_page' => -1, 'post_type'=> 'banner', 'order'   => 'ASC', );
   $myposts = get_posts( $args );
   foreach( $myposts as $post ) : setup_postdata($post); ?>
     

    <?php //adding custom fields ?> 
    <?php 
         $link_text1= get_post_meta($post->ID, 'link_text1', true); 
         $btn_link1= get_post_meta($post->ID, 'btn_link1', true); 
         $link_text2= get_post_meta($post->ID, 'link_text2', true); 
         $btn_link2= get_post_meta($post->ID, 'btn_link2', true); 
      ?>

         <div class="banner_single">
            <?php the_post_thumbnail(); ?>
            <div class="banner_text">
               <p><?php the_excerpt(); ?></p>
               <h1><?php the_title(); ?></h1>

               <a href="<?php echo $btn_link1; ?>" class="pust_btn"><?php echo $link_text1; ?></a>
               <a href="<?php echo $btn_link2; ?>" class="pust_btn"><?php echo $link_text2; ?></a>

            </div>
         </div>

    <?php endforeach; ?>