wordpress plugin php url of plugin files code example

Example 1: how to get plugin directory path in wordpress

if ( is_admin() ) {
    include_once( plugin_dir_path( __FILE__ ) . 'includes/admin-functions.php' );
} else {
    include_once( plugin_dir_path( __FILE__ ) . 'includes/front-end-functions.php' );
}

Example 2: how to get plugin directory path in wordpress

function enqueue_scripts() {
    wp_enqueue_script( 'custom-js', plugin_dir_url( __FILE__ ) . 'js/custom.js', array( 'jquery' ), '', true );
    wp_enqueue_style( 'style-css', plugin_dir_url( __FILE__ ) . 'css/style.css' );
}
add_action( 'wp_enqueue_scripts', 'enqueue_scripts');
 
function admin_enqueue_scripts() {
    wp_enqueue_script( 'custom-js', plugin_dir_url( __FILE__ ) . 'js/custom.js', array( 'jquery' ), '', true );
    wp_enqueue_style( 'style-css', plugin_dir_url( __FILE__ ) . 'css/style.css' );
}
add_action( 'admin_enqueue_scripts', 'admin_enqueue_scripts');