WooCommerce Checkout Fields Auto-Populate

/**

 * Unhook Checkout Autocomplete

 */

add_filter( 'woocommerce_checkout_get_value', 'bks_remove_values', 10, 2 );

function bks_remove_values( $value, $input ) {

	$item_to_set_null = array(

		'billing_first_name',

		'billing_last_name',

		'billing_company',

		'billing_address_1',

		'billing_address_2',

		'billing_city',

		'billing_postcode',

		'billing_country',

		'billing_state',

		'billing_email',

		'billing_phone',

		'shipping_first_name',

		'shipping_last_name',

		'shipping_company',

		'shipping_address_1',

		'shipping_address_2',

		'shipping_city',

		'shipping_postcode',

		'shipping_country',

		'shipping_state',

	); // All the fields in this array will be set as empty string, add or remove as required.

	if ( in_array( $input, $item_to_set_null ) ) {

		$value = '';

	}

	return $value;

}

/**

 * Pre-populate Woocommerce checkout fields

 */

add_filter( 'woocommerce_checkout_get_value', function ( $input, $key ) {

	global $current_user;

	switch ( $key ) :

		case 'billing_first_name':

		case 'shipping_first_name':

			return $current_user->first_name;

			break;

		case 'billing_last_name':

		case 'shipping_last_name':

			return $current_user->last_name;

			break;

		case 'billing_email':

			return $current_user->user_email;

			break;

		case 'billing_phone':

			return $current_user->phone;

			break;

		case 'field_1':

			return $current_user->field_1;

			break;

	endswitch;

}, 10, 2 );