WC_Coupon_Data_Store_CPT::get_coupon_meta_as_array() │ private │ WC 1.0

Get a metadata value that is stored as either a string consisting of a comma-separated list of values or as a serialized array.

WooCommerce always stores the coupon product ids as a comma-separated string, but it seems that some plugins mistakenly change these to an array.

Method of the class: WC_Coupon_Data_Store_CPT{}

No Hooks.

Return

Array. The metadata value as an array, with empty values removed.

Usage

// private - for code of main (parent) class only
$result = $this->get_coupon_meta_as_array( $coupon_id, $meta_key );
$coupon_id(int) (required)
The coupon id.
$meta_key(string) (required)
The meta key to get.

WC_Coupon_Data_Store_CPT::get_coupon_meta_as_array() code WC 9.4.2

woocommerce/includes/data-stores/class-wc-coupon-data-store-cpt.php 
private function get_coupon_meta_as_array( $coupon_id, string $meta_key ) {
	$meta_value = get_post_meta( $coupon_id, $meta_key, true );
	return array_filter(
		is_array( $meta_value ) ? $meta_value : explode( ',', $meta_value )
	);
}