PMPro Display membership levels for posts and pages

pmpro-display-membership-levels-for-posts.php

<?php
/**
 * Show levels for a post/page in the admin.
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function pmprobe_manage_posts_columns( $columns, $post_type)
{
	$post_types =  apply_filters('pmprobe_post_type_columns', array('post'));
		
	if (in_array($post_type, $post_types))
	{
		$columns[ 'pmpro_membership_levels' ] = 'Membership Levels';
	}
		
	return $columns;	
}
add_filter( 'manage_posts_columns', 'pmprobe_manage_posts_columns', 10, 2 );

function pmprobe_manage_pages_columns($columns)
{
	$columns[ 'pmpro_membership_levels' ] = 'Membership Levels';		
	return $columns;	
}
add_filter( 'manage_pages_columns', 'pmprobe_manage_pages_columns', 10, 2 );

function pmprobe_manage_posts_custom_column( $column_name, $post_id )
{
	global $wpdb;
	
	$sqlQuery = "SELECT membership_id FROM $wpdb->pmpro_memberships_pages LEFT JOIN $wpdb->pmpro_membership_levels ON $wpdb->pmpro_memberships_pages.membership_id = $wpdb->pmpro_membership_levels.id WHERE page_id = $post_id";
	$require_metabox_levels = $wpdb->get_col($sqlQuery);
	  
  $sqlQuery = "SELECT * FROM $wpdb->pmpro_membership_levels ORDER BY id ASC";
	$all_levels = $wpdb->get_results($sqlQuery, OBJECT);
  
  $category_levels = array();
  
  foreach($all_levels as $level)
  {
      $protectedcategories = $wpdb->get_col("SELECT category_id FROM $wpdb->pmpro_memberships_categories WHERE membership_id = $level->id");
      //See if this post is in any of the level's protected categories
      if(in_category($protectedcategories, $post_id))
      {
        $category_levels[] = $level->id;
      }
  }  
  
  $restricted = array_unique(array_merge($require_metabox_levels, $category_levels), SORT_REGULAR);
  
  switch( $column_name )
	{
		case 'pmpro_membership_levels':
		
			echo '<div id="pmpro_membership_levels-' . $post_id . '"> ';
			   
			   foreach($restricted as $id)
			   {
				   echo '<span id = "pmpro-level-'.$id.'">';
           
           			$l = pmpro_getLevel($id);
           
				   echo $id. "</span>-". $l->name."<br>";
				   
			   }
			   
			echo '</div>';
		break;		
	}
	
}
add_action( 'manage_posts_custom_column', 'pmprobe_manage_posts_custom_column', 10, 2 );
add_action( 'manage_pages_custom_column', 'pmprobe_manage_posts_custom_column', 10, 2 );