Set Default Members Directory Filter

yzc_set_default_members_directory_filter.php

<?php

/**
 * Select Alphabet on Select Box.
 */
function yzc_make_alphabet_selected() {

    if ( ! bp_is_members_directory() ) {
        return;
    }

    ?>

    <script type="text/javascript">
        jQuery( '#members-order-by option[value="alphabetical"]' ).attr( 'selected', true );
    </script>
    <?php

}
add_action( 'wp_footer', 'yzc_make_alphabet_selected' );

/**
 * Members Directory - Set Default Filter.
 */
function yzc_set_default_members_directory_filter( $loop ) {

    if ( bp_is_members_directory() && ! isset( $loop['scope'] ) ) {
        $loop['type'] = 'alphabetical';
    }

    return $loop;

}

add_filter( 'bp_after_has_members_parse_args', 'yzc_set_default_members_directory_filter', 9999 );