mypmpro-generate-member-number-levels.php

<?php
/**
 * This recipe is based off of the below guide but generaes a member number based on the member's level
 * https://www.paidmembershipspro.com/generate-a-unique-member-number-for-display-on-membership-account-confirmation-email-and-more/
 * 
 * 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/
 */

//Generate a member number based on level + year
function mypmpro_generate_member_number_levels( $user_id ){

	$member_number = get_user_meta($user_id, "member_number", true);
	
	//if no member number, create one
	if( empty( $member_number ) ){
		global $wpdb;
		
		//this code generates a string 10 characters long of numbers and letters
		while( empty( $member_number ) ){

			$scramble = $user_id;
			
			if( !empty( $_REQUEST['level'] ) ){

				if( $_REQUEST['level'] == 1 ){
					$level_code = 'A';
				} else if( $_REQUEST['level'] == 2 ){
					$level_code = 'B';
				} else if( $_REQUEST['level'] == 3 ){
					$level_code = 'C';
				} else {
					$level_code = 'X';
				}

				//We're going to use the format of DATE-CODE-RANDOM as the member number
				$member_number = date('Y').'-'.$level_code.'-'.substr( $scramble, 0, 5 );
			
				$check = $wpdb->get_var( "SELECT meta_value FROM $wpdb->usermeta WHERE meta_value = '" . esc_sql($member_number) . "' LIMIT 1" );
				
				if( $check || is_numeric( $member_number ) )
					$member_number = NULL;

			}
			
		}

		//save to user meta
		update_user_meta( $user_id, "member_number", $member_number );
		
		return $member_number;
	}

}
add_action('user_register', 'mypmpro_generate_member_number_levels', 99);

//Show it on the membership account page.
function pmpromn_pmpro_account_bullets_bottom()
{
	if(is_user_logged_in())
	{
		global $current_user;
		
		//get member number
		$member_number = get_user_meta($current_user->ID, "member_number", true);
		
		//if no number, generate one
		if(empty($member_number))
			$member_number = mypmpro_generate_member_number_levels($current_user->ID);
		
		//show it
		if(!empty($member_number))
		{
		?>
		<li><strong><?php _e("Member Number", "pmpro");?>:</strong> <?php echo $member_number?></li>
		<?php
		}
	}
}
add_action('pmpro_account_bullets_bottom', 'pmpromn_pmpro_account_bullets_bottom');
add_action('pmpro_invoice_bullets_bottom', 'pmpromn_pmpro_account_bullets_bottom');

//show member_number in confirmation emails
function pmpromn_pmpro_email_filter($email)
{
	global $wpdb;
 	
	//only update admin confirmation emails
	if(strpos($email->template, "checkout") !== false)
	{
		if(!empty($email->data) && !empty($email->data['user_login']))
		{
			$user = get_user_by("login", $email->data['user_login']);			
			if(!empty($user) && !empty($user->ID))
			{
				$member_number = get_user_meta($user->ID, "member_number", true);
				
				if(!empty($member_number))
					$email->body = str_replace("<p>Membership Level", "<p>Member Number:" . $member_number . "</p><p>Membership Level", $email->body);
			}
		}
	}
		
	return $email;
}
add_filter("pmpro_email_filter", "pmpromn_pmpro_email_filter", 30, 2);