File: /var/www/delta/wp-content/plugins/wpml-string-translation/classes/Troubleshooting/RequestHandle.php
<?php
namespace WPML\ST\Troubleshooting;
class RequestHandle implements \IWPML_Action {
	/** @var string $action */
	private $action;
	/** @var callable $callback */
	private $callback;
	public function __construct( $action, $callback ) {
		$this->action   = $action;
		$this->callback = $callback;
	}
	public function add_hooks() {
		add_action( 'wp_ajax_' . $this->action, [ $this, 'handle' ] );
	}
	public function handle() {
		if ( wp_verify_nonce( $_POST['nonce'], BackendHooks::NONCE_KEY ) ) {
			call_user_func( $this->callback );
			wp_send_json_success();
		} else {
			wp_send_json_error( 'Invalid nonce value', 500 );
		}
	}
}