This task is more complicated because, firstly, you need to upload your files into plugin folder /wp-content/plugins/functionsphp/ via FTP or file manager in hosting panel. If this task is completed, use following code for connecting uploaded files, examples, mystyle.css and myscript.js:
/* ================================================================================= * CODES BEFORE and AFTER TEXT * ================================================================================= */ function functionsphp_style_and_script() { wp_enqueue_style( 'mystyle', plugin_dir_url( __FILE__ ) .'mystyle.css' , array(), true); wp_enqueue_script( 'myscript', plugin_dir_url( __FILE__ ) .'myscript.js' , array(), true, true ); } add_action( 'wp_enqueue_scripts', 'functionsphp_style_and_script', 100 ); /* ================================================================================= */