WooCommerce Customized Billing and Shipping Address Fields

<?php
add_filter( 'woocommerce_default_address_fields', 'cxc_remove_billing_shipping_add_fields' );
function cxc_remove_billing_shipping_add_fields( $fields ) {
	unset( $fields[ 'address_1' ] );
	unset( $fields[ 'postcode' ] );
	return $fields;
}
?>

<?php
add_filter( 'woocommerce_billing_fields', 'cxc_remove_billing_fields' );
function cxc_remove_billing_fields( $fields ) {
	unset( $fields[ 'billing_address_1' ] ); // or shipping_address_2 for woocommerce_shipping_fields hook
	unset( $fields[ 'billing_postcode' ] );
	return $fields;
}
?>

<?php
add_filter( 'woocommerce_shipping_fields', 'cxc_remove_shipping_fields' );
function cxc_remove_shipping_fields( $fields ) {
	unset( $fields[ 'shipping_last_name' ][ 'required' ] );
	return $fields;
}
?>

<?php
add_filter( 'woocommerce_shipping_fields', 'cxc_shipping_compnay_required_fields' );
function cxc_shipping_compnay_required_fields( $fields ) {
	$fields[ 'shipping_company' ][ 'required' ] = true;
	return $fields;
}
?>

<?php
add_filter( 'woocommerce_default_address_fields', 'cxc_billing_shipping_change_fname_field' );
function cxc_billing_shipping_change_fname_field( $fields ) {
	$fields[ 'first_name' ][ 'label' ] = 'Name';
	$fields[ 'first_name' ][ 'placeholder' ] = 'What is your name ?';
	return $fields;
}
?>

<?php
//woocommerce_billing_fields, woocommerce_shipping_fields
add_filter( 'woocommerce_default_address_fields', 'misha_add_field' );
function misha_add_field( $fields ) {
	
	$fields[ 'fav_color' ]   = array(
		'label'        => __( 'Cxc Favorite color', 'cxc-codexcoach' ), // Add custom field label
		'placeholder'  => _x( 'Is it Yellow or Green or maybe Blue ...?', 'placeholder', 'cxc-codexcoach' ), // Add custom field placeholder
		'required'     => true, // if field is required or not
		'clear'        => true, // add clear or not
		'class'        => array( 'form-row-wide', 'cxc-custom-color-class' ), // add class name
		'type'         => "text", // add field type
		'priority'     => 20,
	);

	$fields['gst_numbers'] = array(
        'label'       => __( 'GST', 'cxc-codexcoach' ), // Add custom field label
        'placeholder' => _x( 'Your GST Number here....', 'placeholder', 'cxc-codexcoach' ), // Add custom field placeholder
        'required'    => true, // if field is required or not
        'clear'       => false, // add clear or not
        'class'       => array( 'form-row-wide', 'cxc-custom-gst-class' ),  // add class name
        'type'        => "text", // add field type
        'priority'    => 21, // add priority
    );
	
	return $fields;
}
?>