Strip the first word only of a string

gv_wordstrip.php

add_shortcode( 'gv_wordstrip', 'gv_wordstrip' );
function gv_wordstrip( $atts ) {
	global $gravityview_view;
    extract($gravityview_view->field_data); // create a $entry variable with current entry data array

	extract( shortcode_atts(
		array(
			'field_id' => '',
		), $atts )
	);

	$word = $entry[$field_id];
	
    if (empty($word)) {
        return 'Error: No field ID specified.';
    }else{
		$firstword = substr($word, 0,1);
    }

	return $firstword;
}