wp greeting user

greeting.php

<?php
// Add Shortcode
function subform() {
	ob_start();

	// Greet guests, if user is not logged in.
	$user_display_name = __( 'Guest', 'wpmudev' );

	// Get the current user's display name.
	if ( is_user_logged_in() ) {
		$current_user      = wp_get_current_user();
		$user_display_name = $current_user->display_name;
	}

	// Get the blog name.
	$blog_name = get_bloginfo( 'name' );

	/* translators: 1. User name, 2. Blog name */
	$greeting = sprintf( esc_html__( 'Hey %1$s, welcome to %2$s! You can subscribe to our newsletter here:', 'wpmudev' ), $user_display_name, $blog_name );
	?>

	<p><?php echo esc_html( $greeting ); ?></p>

	<form action="<?php echo esc_url( get_site_url( null, '/thank-you/' ) ); ?>">
		<label for="email"><?php esc_html_e( 'Enter your email:', 'wpmudev' ); ?></label>
		<input type="email" id="email" name="email">
		<input type="submit" value="<?php esc_attr_e( 'Submit', 'wpmudev' ); ?>">
	</form>
	<?php
	return ob_get_clean();
}

add_shortcode( 'subscriptionform', 'subform' );