Add a "Requires Membership" column to the All Pages and All Post dashboard page to show what levels are required to view. Raw

requires_membership_pages_columns.php

<?php
/**
 * Add a Requires Membership Column to All Page and Post Views.
 * This is an easy way to see how your content is being restricted for members.
 */

// Add a new column to the all pages and posts views
function requires_membership_columns_head( $defaults ) {
    $defaults['requires_membership'] = 'Requires Membership';
    return $defaults;
}

// Get the column data for pages and posts
function requires_membership_columns_content( $column_name, $post_ID ) {
    if ( $column_name == 'requires_membership' ) {
        global $membership_levels, $wpdb;

        // Retrieve membership levels protecting the content
        $post_levels = $wpdb->get_col(
            $wpdb->prepare(
                "SELECT membership_id FROM {$wpdb->pmpro_memberships_pages} WHERE page_id = %d",
                $post_ID
            )
        );

        $protected_levels = array();
        if ( ! empty( $post_levels ) ) {
            foreach ( $membership_levels as $level ) {
                if ( in_array( $level->id, $post_levels ) ) {
                    $protected_levels[] = $level->name;
                }
            }
        }

        // Display the membership levels or 'None'
        echo ! empty( $protected_levels ) ? implode( ', ', $protected_levels ) : 'None';
    }
}

// Add column for pages
add_filter( 'manage_pages_columns', 'requires_membership_columns_head' );
add_action( 'manage_pages_custom_column', 'requires_membership_columns_content', 10, 2 );

// Add column for posts
add_filter( 'manage_posts_columns', 'requires_membership_columns_head' );
add_action( 'manage_posts_custom_column', 'requires_membership_columns_content', 10, 2 );