PMPro - QR Code as Avatar

pmpro-qr-code-avatar.php

<?php
/**
 * This recipe replaces a user's avatar with a QR code.
 * 
 * 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/
 */
/**
 * Perform membership actions outputting shortcode content and QR code data.
 */
class PMPro_Membership_Card_Customizations {
	public function __construct() {
		add_filter( 'get_avatar', array( $this, 'avatar_override' ), 10, 6 );
		add_filter( 'pmpro_membership_card_qr_code_size', array( $this, 'avatar_size' ) );
	}

    /**
     * Return a large QR Code
     */
	public function avatar_size( $size ) {
		return '256x256';
	}

	/**
	 * Return a QR Code instead of user avatar.
	 */
	public function avatar_override( $avatar, $id_or_email, $size, $default, $alt, $args = array() ) {

		// Return avatar if in admin panel or user is an admin or above.
		if ( ! function_exists( 'pmpro_membership_card_return_qr_code_data' ) || ! function_exists( 'pmpro_hasMembershipLevel' ) || current_user_can( 'manage_options' ) || ! is_user_logged_in() ) {
			return $avatar;
		}

		// Make sure user has a membership level.
		if ( ! pmpro_hasMembershipLevel() ) {
			return $avatar;
		}

		global $current_user;
		return sprintf( '<img alt="QR CODE" src="%s" />', esc_url_raw( pmpro_membership_card_return_qr_code_data( $current_user, 'email' ) ) );
	}
}
new PMPro_Membership_Card_Customizations();