Restrict members from accessing members-only content using a checkbox in the profile. Requires PMPro and Register Helper Add On.

pmpro_rh_restrict_users.php

<?php
/*
  Restrict members from accessing members-only content using a checkbox in the profile.
  The button will only show when logged in as an admin.
  Requires PMPro and Register Helper Add On to be installed, activated, and configured.
*/

function my_pmprorh_init_restrict()
{
	//don't break if Register Helper is not loaded
	if(!function_exists( 'pmprorh_add_registration_field' )) {
		return false;
	}
	
	$fields = array();
	$fields[] = new PMProRH_Field(
		'rh_restrict_access',				// input name, will also be used as meta key
		'checkbox',
		array(
			'label'		=> 'Restrict Access</br><strong>NOTE: the user will not be able to access members-only content until this option is disabled</strong>',
			'profile'	=> 'only_admin',	// only show in user profile for admins
		)
	);
	
	foreach($fields as $field)
		pmprorh_add_registration_field(
			'checkout_boxes',
			$field
		);
	//see the PMPro Register Helper readme for more information and examples.
}
add_action( 'init', 'my_pmprorh_init_restrict' );

function my_pmpro_has_membership_access_filter($hasaccess, $mypost, $myuser, $post_membership_levels)
{
	$restrict = $myuser->rh_restrict_access;
	if(!empty($restrict) && !empty($post_membership_levels))
	{
		$hasaccess = false;
		add_filter("pmpro_non_member_text_filter", "my_pmpro_non_member_restricted_text");
	}
	return $hasaccess;
}
add_filter('pmpro_has_membership_access_filter', 'my_pmpro_has_membership_access_filter', 10, 4);

function my_pmpro_levels_restricted_message($temp_content)
{
	$myuser = wp_get_current_user();
	$restricted = $myuser->rh_restrict_access;
	if(!empty($restricted)){
		$message = '<div class="pmpro_message pmpro_error">';
		
		// Change this line to customize the message members see when their access is restricted
		$message .= __("Your membership has been restricted. Please contact the site administrator for details.", 'paid-memberships-pro');
		
		$message .= '</div>';
		$temp_content = $message . $temp_content;
		
	}
	return $temp_content;
}
add_filter('pmpro_pages_shortcode_levels', 'my_pmpro_levels_restricted_message', 10, 1);

function my_pmpro_non_member_restricted_text()
{
		$message = '<div class="pmpro_message pmpro_error">';

		// Change this line to customize the message members see when their access is restricted
		$message .= __("Your membership has been restricted. Please contact the site administrator for details.", 'paid-memberships-pro');

		$message .= '</div>';
		return $message;
}