use short ternary operator

Author: selul

inc/settings.php

@@ -752,7 +752,7 @@ public function clear_cache( $type = '' ) {
 			$token = $this->get( 'cache_buster_assets' );
 		} else {
 			// here is an individual clear cache based on filename.
-			$token = get_transient( '_file_' . crc32( $type ) ) ?? '';
+			$token = get_transient( '_file_' . crc32( $type ) ) ?: '';
 		}
 
 		$request = new Optml_Api();

inc/url_replacer.php

@@ -284,7 +284,7 @@ private function normalize_image( $url, $original_url, $args, $is_uploaded = fal
 	 * @return string
 	 */
 	public static function get_active_cache_booster( $url, $main_cache_buster ) {
-		return get_transient( '_file_' . crc32( wp_basename( $url ) ) ) ?? $main_cache_buster;
+		return get_transient( '_file_' . crc32( wp_basename( $url ) ) ) ?: $main_cache_buster;
 	}
 	/**
 	 * Throw error on object clone

phpcs.xml

@@ -30,6 +30,7 @@
         <exclude name="Squiz.Commenting.FileComment"/>
         <exclude name="WordPress.PHP.YodaConditions.NotYoda"/>
         <exclude name="Universal.Arrays.DisallowShortArraySyntax.Found"/>
+        <exclude name="Universal.Operators.DisallowShortTernary.Found"/>
         <exclude name="Squiz.PHP.DisallowMultipleAssignments"/>
         <exclude name="WordPress.NamingConvention.ValidVariableName.StringNotSnakeCase"/>
         <exclude name="WordPress.NamingConventions.ValidVariableName.NotSnakeCase"/>