Redirect to the BuddyPress profile page of a user when a visitor clicks on the "View Profile" link in the PMPro Members Directory page.

my-pmpromd-redirect-to-buddypress-profile-page.php

<?php
/**
 * This recipe changes the PMPro Member Directory's "View Profile"
 * link on the directory page to the BuddyPress member directory and
 * redirects to the BuddyPress Profile page of the member if the
 * URL parameter "pu" is present in the querystring.
 *
 * 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/
 */

// Set profile URL to BuddyPress Members Directory
function my_pmpromd_profile_url_buddypress( $url ) {

	// Only change the URL if BuddyPress and our custom redirect function exists.
	if ( function_exists( 'bp_get_members_directory_permalink' ) && function_exists( 'my_buddpress_directory_to_profile_redirect' ) ) {
		$url = bp_get_members_directory_permalink();
	}

	return $url;
}
add_filter( 'pmpromd_profile_url', 'my_pmpromd_profile_url_buddypress' );

function my_buddpress_directory_to_profile_redirect() {

	// Bail if any of the required parts are missing.
	if ( ! function_exists( 'bp_is_directory' ) || ! function_exists( 'bp_core_get_user_domain' ) || ! function_exists( 'my_pmpromd_profile_url_buddypress' ) || empty( $_REQUEST['pu'] ) ) {
		return;
	}

	// Are we on the BuddyPress member directory page.
	if ( bp_is_directory() ) {

		// Check for the required URL parameter.
		$pu = $_REQUEST['pu'];

		// Get user
		if ( ! is_numeric( $pu ) ) {
			$user = get_user_by( 'login', $pu ); // get user with login name
			$user = $user ? $user : get_user_by( 'slug', $pu ); //get user by slug
		} else {
			$user = get_user_by( 'ID', $pu ); // get user with User ID
		}

		// Bail if user doesn't exist
		if ( empty( $user ) ) {
			return;
		}
	}

	// Get the BuddyPress member profile URL.
	if ( function_exists( 'bp_core_get_user_domain' ) ) {
		$url = bp_core_get_user_domain( $user->ID );
	}

	// Bail if necessary
	if ( empty( $url ) ) {
		return;
	}

	// Redirect to BuddyPress profile page.
	wp_safe_redirect( $url );
	exit;
}
add_action( 'template_redirect', 'my_buddpress_directory_to_profile_redirect' );