Generates and displays sequential numbers for members of a designated level on account, profile, members list, card, and CSV export.

sequential-numeric-member-number-level-specific.php

<?php
/**
 * Sequential Membership Numbers for designed membership level e.g Membership Level 2 Only
 *
 * This forked version generates sequential membership numbers only for users registered at Membership Level 2.
 * Member numbers are automatically increased from the starting value set for $starting_member_number 
 * after each new Level 2 member registration.
 *
 * Displayed on user account, edit profile, members list pages, membership card, and included in members list CSV export.
 * 
 * Requirements:
 * Membership Card Add On - https://www.paidmembershipspro.com/add-ons/pmpro-membership-card/
 * Custom Membership Card template - https://gist.github.com/ipokkel/c3a93a5718aa5646b80adff814ed76d4
 */

/**
 * Generate member_number only for users with Membership Level 2 during registration.
 *
 * Existing members in the system will not receive a membership number unless they are at Level 2.
 */
function generate_member_number( $user_id ) {
    // Set the starting membership number here
    $starting_member_number = 3418; 

    // Check if the user has Membership Level 2
    if ( pmpro_hasMembershipLevel( 2, $user_id ) ) {
        // Retrieve current member number from options
        $current_member_number = get_option( 'pmpro_seq_current_member_num' );

        // Initialize current member number if it doesn't exist
        if ( empty( $current_member_number ) ) {
            $current_member_number = $starting_member_number;
        }

        // Update user metadata and increase the member number for the next user
        update_user_meta( $user_id, 'member_number', $current_member_number );
        update_option( 'pmpro_seq_current_member_num', $current_member_number + 1 );

        return $current_member_number;
    }

    // Return null if user is not at Membership Level 2
    return null;
}
add_action( 'user_register', 'generate_member_number' );

/**
 * Show member number on the membership account page, only for users at Membership Level 2.
 */
function pmpromn_pmpro_account_bullets_bottom() {
    if ( is_user_logged_in() ) {
        global $current_user;

        // Only display for Membership Level 2
        if ( pmpro_hasMembershipLevel( 2, $current_user->ID ) ) {
            // Retrieve member number
            $member_number = get_user_meta( $current_user->ID, 'member_number', true );

            // Generate member number on-the-fly if missing
            if ( empty( $member_number ) ) {
                $member_number = generate_member_number( $current_user->ID );
            }

            // Display member number if available
            if ( ! empty( $member_number ) ) {
                ?>
                <li><strong><?php _e( 'Member Number', 'paid-memberships-pro' ); ?>:</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' );

/**
 * Add member number to confirmation emails for Level 2 members only.
 */
add_filter( 'pmpro_email_filter', 'pmpromn_pmpro_email_filter', 30, 2 );
function pmpromn_pmpro_email_filter( $email ) {
    // Check if this is a checkout email
    if ( strpos( $email->template, 'checkout' ) !== false ) {
        if ( ! empty( $email->data ) && ! empty( $email->data['user_login'] ) ) {
            // Retrieve user by login
            $user = get_user_by( 'login', $email->data['user_login'] );
            
            // Only add member number if user is at Membership Level 2
            if ( $user && pmpro_hasMembershipLevel( 2, $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;
}

/**
 * Include member number in Members List and CSV export only for Level 2 members.
 */
add_filter( 'pmpro_members_list_csv_extra_columns', 'my_pmpro_members_list_csv_extra_columns', 10 );
function my_pmpro_members_list_csv_extra_columns( $columns ) {
    $columns['member_number'] = 'my_extra_column_member_number';
    return $columns;
}

function my_extra_column_member_number( $user ) {
    // Only add member number for Level 2 members
    if ( pmpro_hasMembershipLevel( 2, $user->ID ) ) {
        if ( empty( $user->metavalues->member_number ) ) {
            generate_member_number( $user->ID );
        }
        return $user->metavalues->member_number;
    }
    // Return empty if not Level 2
    return '';
}

/**
 * Display member number in Members List for Level 2 members only.
 */
add_action( 'pmpro_memberslist_extra_cols_header', 'my_pmpro_memberslist_extra_cols_header' );
function my_pmpro_memberslist_extra_cols_header() {
    ?>
    <th><?php _e( 'Member Number', 'paid-memberships-pro' ); ?></th>
    <?php
}

add_action( 'pmpro_memberslist_extra_cols_body', 'my_pmpro_memberslist_extra_cols_body' );
function my_pmpro_memberslist_extra_cols_body( $theuser ) {
    // Only show member number if user is at Level 2
    if ( pmpro_hasMembershipLevel( 2, $theuser->ID ) ) {
        if ( empty( $theuser->member_number ) ) {
            generate_member_number( $theuser->ID );
        }
        ?>
        <td><?php echo $theuser->member_number; ?></td>
        <?php
    } else {
        echo '<td></td>'; // Leave blank for non-Level 2 members
    }
}