shell_functions_available()) { self::try_converters($converters_with_shell); } else { // If no working converters that don’t require shell access are found, // and shell functions are unavailable, store the errors. foreach ($converters_with_shell as $converter_id) { self::$errors[$converter_id] = __('Required WebP shell functions are not available on the server.', 'wp-optimize'); } } } return array( 'working_converters' => self::$working_converters, 'errors' => self::$errors, ); } /** * Tries each converter from the list to convert to WebP * * @param array $converters * @return void */ private static function try_converters($converters) { $source = WPO_PLUGIN_MAIN_PATH . 'images/logo/wpo_logo_small.png'; $upload_dir = wp_upload_dir(); $destination = $upload_dir['basedir']. '/wpo/images/wpo_logo_small.png.webp'; foreach ($converters as $converter_id) { $conversion_result = self::try_converter($converter_id, $source, $destination, $upload_dir['basedir']); if (true === $conversion_result) { self::$working_converters[] = $converter_id; } else { self::$errors[$converter_id] = $conversion_result; } } } /** * Tries to convert to WebP and returns true if the conversion finishes successfully. * * @param string $converter_id * @param string $source * @param string $destination * @param string $target_dir * @return true|string */ private static function try_converter($converter_id, $source, $destination, $target_dir) { try { WPO_WebP_Utils::perform_webp_conversion($converter_id, $source, $destination); // Copying source file to `uploads` folder. To be used test redirection // We're doing it here, to make sure folders already exists `/wpo/images/` copy($source, $target_dir. '/wpo/images/wpo_logo_small.png'); return true; } catch (\Exception $e) { return $e->getMessage(); } } } endif;