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функция не описана

WC_Coupon::decrease_usage_count() public WC 1.0

Decrease usage count for current coupon.

Это метод класса: WC_Coupon{}

Хуков нет.

Возвращает

Null. Ничего.

Использование

$WC_Coupon = new WC_Coupon();
$WC_Coupon->decrease_usage_count( $used_by );
$used_by(строка)
Either user ID or billing email.
По умолчанию: ''

Код WC_Coupon::decrease_usage_count() WC 4.5.2

woocommerce/includes/class-wc-coupon.php
<?php
public function decrease_usage_count( $used_by = '' ) {
	if ( $this->get_id() && $this->get_usage_count() > 0 && $this->data_store ) {
		$new_count = $this->data_store->decrease_usage_count( $this, $used_by );

		// Bypass set_prop and remove pending changes since the data store saves the count already.
		$this->data['usage_count'] = $new_count;
		if ( isset( $this->changes['usage_count'] ) ) {
			unset( $this->changes['usage_count'] );
		}
	}
}