Use PHP 7.4 featers and PHP 8 polyfills
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@ -29,9 +29,9 @@ class Discount_Code_Compat {
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* @since 2.0.0
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* @return void
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*/
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public function init() {
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public function init(): void {
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add_filter('update_post_metadata', array($this, 'check_update_coupon'), 10, 5);
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add_filter('update_post_metadata', [$this, 'check_update_coupon'], 10, 5);
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}
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/**
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