Robust comments (#272)

Author: Korbeil

src/Loader.php

@@ -246,6 +246,11 @@ protected function sanitiseVariableValue($name, $value)
             $parts = explode(' #', $value, 2);
             $value = trim($parts[0]);
 
+            // Check if value is a comment (usually triggered when empty value with comment)
+            if (preg_match('/^#/', $value) > 0) {
+                $value = '';
+            }
+
             // Unquoted values cannot contain whitespace
             if (preg_match('/\s+/', $value) > 0) {
                 throw new InvalidFileException('Dotenv values containing spaces must be surrounded by quotes.');

tests/fixtures/env/commented.env

@@ -5,6 +5,8 @@ CFOO=bar
 CSPACED="with spaces" # this is a comment
 CQUOTES="a value with a # character" # this is a comment
 CQUOTESWITHQUOTE="a value with a # character & a quote \" character inside quotes" # " this is a comment
+EMPTY= # comment with empty variable
+BOOLEAN=yes # (yes, no)
 
 CNULL=