这是过滤器："plugin_install_action_links".

你可以在/wp-admin/includes/class-wp-plugin-install-list-table.php （目前）第434行：

$action_links = apply_filters( \'plugin_install_action_links\', $action_links, $plugin );

add_filter( \'plugin_install_action_links\', \'my_custom_links\', 10, 2 );

function my_custom_links( $action_links, $plugin ){
    $action_links[] = \'<a href="">......</a>\';
    return $action_links;
}