Add special case for invalid Accept-Language string

Author: mpbzh

src/AcceptLanguage.php

@@ -6,7 +6,7 @@
 
 class AcceptLanguage
 {
-	const REGEX = '/([a-z]{1,8}(?:-[a-z0-9]{1,8})?)(?:;q=([0-9].[0-9]+))?/i';
+	const REGEX = '/([a-z*]{1,8}(?:-[a-z0-9]{1,8})?)(?:;q=([0-9].[0-9]+))?/i';
 
 	/**
 	 * @param string $in
@@ -22,7 +22,7 @@ public static function parse(string $in)
 			$q = $matches[2] ?? 1;
 			$locale = $matches[1] ?? null;
 
-			if ($locale === null)
+			if ($locale === null || $locale === '*')
 				continue;
 
 			$locales[$q][$locale] = (float)$q;

test/AcceptLanguageTest.php

@@ -14,6 +14,7 @@ public function parseProvider()
 			['en;q=0.7, en-gb;q=0.8, da, *', ['da', 'en-gb', 'en', '*']],
 			['*, en;q=0.9, en-US', ['en-US', 'en', '*']],
 			['cc, aa, bb', ['cc', 'aa', 'bb']],
+			['de-CH, fr;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5', ['de-CH', 'fr', 'en', 'de', '*']],
 		];
 	}