Edit: feature-flag-conditional.php
<?php namespace Yoast\WP\SEO\Conditionals; /** * Abstract class for creating conditionals based on feature flags. */ abstract class Feature_Flag_Conditional implements Conditional { /** * Returns whether or not this conditional is met. * * @return bool Whether or not the conditional is met. */ public function is_met() { $feature_flag = \strtoupper( $this->get_feature_flag() ); return \defined( 'YOAST_SEO_' . $feature_flag ) && \constant( 'YOAST_SEO_' . $feature_flag ) === true; } /** * Returns the name of the feature flag. * 'YOAST_SEO_' is automatically prepended to it and it will be uppercased. * * @return string the name of the feature flag. */ abstract protected function get_feature_flag(); /** * Returns the feature name. * * @return string the name of the feature flag. */ public function get_feature_name() { return $this->get_feature_flag(); } }
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