[5.5] Add support for unicode variable names (#546)

Co-authored-by: Thor Erik <[email protected]>

Author: GrahamCampbell

src/Parser/EntryParser.php

@@ -139,7 +139,7 @@ private static function isQuotedName(string $name)
      */
     private static function isValidName(string $name)
     {
-        return Regex::matches('~\A[a-zA-Z0-9_.]+\z~', $name)->success()->getOrElse(false);
+        return Regex::matches('~(*UTF8)\A[\p{Ll}\p{Lu}\p{M}\p{N}_.]+\z~', $name)->success()->getOrElse(false);
     }
 
     /**

tests/Dotenv/DotenvTest.php

@@ -335,6 +335,14 @@ public function testEmptyLoading()
         self::assertSame(['EMPTY_VAR' => null], $dotenv->load());
     }
 
+    public function testUnicodeVarNames()
+    {
+        $dotenv = Dotenv::createImmutable(self::$folder, 'unicodevarnames.env');
+        $dotenv->load();
+        self::assertSame('Skybert', $_SERVER['AlbertÅberg']);
+        self::assertSame('2022-04-01T00:00', $_SERVER['ДатаЗакрытияРасчетногоПериода']);
+    }
+
     public function testDirectConstructor()
     {
         $repository = RepositoryBuilder::createWithDefaultAdapters()->make();

tests/Dotenv/Parser/EntryParserTest.php

@@ -24,6 +24,12 @@ public function testNullParse()
         $this->checkEmptyResult($result, 'FOO');
     }
 
+    public function testUnicodeNameParse()
+    {
+        $result = EntryParser::parse('FOOƱ=BAZ');
+        $this->checkPositiveResult($result, 'FOOƱ', 'BAZ');
+    }
+
     public function testQuotesParse()
     {
         $result = EntryParser::parse("FOO=\"BAR  \n\"");
@@ -139,12 +145,6 @@ public function testParseInvalidName()
         $this->checkErrorResult($result, 'Encountered an invalid name at [FOO_ASD!].');
     }
 
-    public function testParseUnicodeName()
-    {
-        $result = EntryParser::parse('FOOƱ=BAZ');
-        $this->checkErrorResult($result, 'Encountered an invalid name at [FOOƱ].');
-    }
-
     public function testParserEscapingDouble()
     {
         $result = EntryParser::parse('FOO_BAD="iiiiviiiixiiiiviiii\\a"');

tests/fixtures/env/unicodevarnames.env

@@ -0,0 +1,2 @@
+AlbertÅberg=Skybert
+ДатаЗакрытияРасчетногоПериода='2022-04-01T00:00'