RCP: custom multicheck field

rcp-custom-field-multicheck.php

<?php
/**
 * Example for adding a custom multicheck field to the
 * Restrict Content Pro registration form and profile editors.
 */

/**
 * Adds a multicheck field to the registration form an dprofile editor.
 */
function rcp_add_multicheck_field() {

	$interests = get_user_meta( get_current_user_id(), 'rcp_interests', true );

	if ( ! is_array( $interests ) ) {
		$interests = array();
	}
	?>
	<p>
		<?php _e( 'Select your interests', 'rcp' ); ?>
	</p>
	<p>
		<input name="rcp_interests[]" id="rcp_interests_art" type="checkbox" value="art" <?php checked( in_array( 'art', $interests ) ); ?>/>
		<label for="rcp_interests_art"><?php _e( 'Art', 'rcp' ); ?></label> <br>
		<input name="rcp_interests[]" id="rcp_interests_books" type="checkbox" value="books" <?php checked( in_array( 'books', $interests ) ); ?>/>
		<label for="rcp_interests_books"><?php _e( 'Books', 'rcp' ); ?></label> <br>
		<input name="rcp_interests[]" id="rcp_interests_sports" type="checkbox" value="sports" <?php checked( in_array( 'sports', $interests ) ); ?>/>
		<label for="rcp_interests_sports"><?php _e( 'Sports', 'rcp' ); ?></label>
		<!-- add more fields as desired -->
	</p>
	<?php

}

add_action( 'rcp_after_password_registration_field', 'rcp_add_multicheck_field' );
add_action( 'rcp_profile_editor_after', 'rcp_add_multicheck_field' );

/**
 * Adds the custom multicheck field to the member edit screen.
 */
function ag_rcp_add_multicheck_member_edit_fields( $user_id = 0 ) {

	$interests = get_user_meta( $user_id, 'rcp_interests', true );
	?>
	<tr valign="top">
		<th scope="row" valign="top">
			<label for="rcp_interests"><?php _e( 'Interests', 'rcp' ); ?></label>
		</th>
		<td>
			<input name="rcp_interests[]" id="rcp_interests_art" type="checkbox" value="art" <?php checked( in_array( 'art', $interests ) ); ?>/>
			<span class="description"><?php _e( 'Art', 'rcp' ); ?></span> <br>
			<input name="rcp_interests[]" id="rcp_interests_books" type="checkbox" value="books" <?php checked( in_array( 'books', $interests ) ); ?>/>
			<span class="description"><?php _e( 'Books', 'rcp' ); ?></span> <br>
			<input name="rcp_interests[]" id="rcp_interests_sports" type="checkbox" value="sports" <?php checked( in_array( 'sports', $interests ) ); ?>/>
			<span class="description"><?php _e( 'Sports', 'rcp' ); ?></span>
			<!-- add more fields as desired -->
		</td>
	</tr>
	<?php

}
add_action( 'rcp_edit_member_after', 'ag_rcp_add_multicheck_member_edit_fields' );

/**
 * Shows an error message if none of the multicheck options are selected.
 * Remove this code if you want the multicheck to be optional.
 */
function ag_rcp_validate_multicheck_on_register( $posted ) {

	if ( is_user_logged_in() ) {
		return;
	}

	if ( empty( $posted['rcp_interests'] ) || ! is_array( $posted['rcp_interests'] ) ) {
		rcp_errors()->add( 'invalid_interests', __( 'Please select at least one interest', 'rcp' ), 'register' );
	}

}

add_action( 'rcp_form_errors', 'ag_rcp_validate_multicheck_on_register', 10 );

/**
 * Stores the information submitted during registration
 *
 * Stores all the selected interests in an array.
 */
function ag_rcp_save_multicheck_field_on_register( $posted, $user_id ) {
	if ( ! empty( $posted['rcp_interests'] ) && is_array( $posted['rcp_interests'] ) ) {
		// First sanitize the array.
		$interests = array_map( 'sanitize_text_field', $posted['rcp_interests'] );

		// Now save.
		update_user_meta( $user_id, 'rcp_interests', $interests );
	}
}
add_action( 'rcp_form_processing', 'ag_rcp_save_multicheck_field_on_register', 10, 2 );

/**
 * Stores the information submitted profile update
 *
 * Stores all the selected interests in an array.
 */
function ag_rcp_save_multicheck_field_on_profile_save( $user_id ) {
	if ( ! empty( $_POST['rcp_interests'] ) && is_array( $_POST['rcp_interests'] ) ) {
		// First sanitize the array.
		$interests = array_map( 'sanitize_text_field', $_POST['rcp_interests'] );

		// Now save.
		update_user_meta( $user_id, 'rcp_interests', $interests );
	} else {
		// Delete the user meta if no checkboxes are selected.
		delete_user_meta( $user_id, 'rcp_interests' );
	}
}
add_action( 'rcp_user_profile_updated', 'ag_rcp_save_multicheck_field_on_profile_save', 10 );
add_action( 'rcp_edit_member', 'ag_rcp_save_multicheck_field_on_profile_save', 10 );