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vendor/ramsey/uuid/src/Rfc4122/VariantTrait.php

@@ -19,8 +19,8 @@ use Ramsey\Uuid\Uuid;
 
 use function decbin;
 use function str_pad;
+use function str_starts_with;
 use function strlen;
-use function strpos;
 use function substr;
 use function unpack;
 
@@ -58,7 +58,13 @@ trait VariantTrait
             throw new InvalidBytesException('Invalid number of bytes');
         }
 
-        /** @var array $parts */
+        if ($this->isMax() || $this->isNil()) {
+            // RFC 4122 defines these special types of UUID, so we will consider
+            // them as belonging to the RFC 4122 variant.
+            return Uuid::RFC_4122;
+        }
+
+        /** @var int[] $parts */
         $parts = unpack('n*', $this->getBytes());
 
         // $parts[5] is a 16-bit, unsigned integer containing the variant bits
@@ -67,7 +73,7 @@ trait VariantTrait
         // three characters (three most-significant bits) to determine the
         // variant.
         $binary = str_pad(
-            decbin((int) $parts[5]),
+            decbin($parts[5]),
             16,
             '0',
             STR_PAD_LEFT
@@ -76,15 +82,13 @@ trait VariantTrait
         $msb = substr($binary, 0, 3);
 
         if ($msb === '111') {
-            $variant = Uuid::RESERVED_FUTURE;
+            return Uuid::RESERVED_FUTURE;
         } elseif ($msb === '110') {
-            $variant = Uuid::RESERVED_MICROSOFT;
-        } elseif (strpos($msb, '10') === 0) {
-            $variant = Uuid::RFC_4122;
-        } else {
-            $variant = Uuid::RESERVED_NCS;
+            return Uuid::RESERVED_MICROSOFT;
+        } elseif (str_starts_with($msb, '10')) {
+            return Uuid::RFC_4122;
         }
 
-        return $variant;
+        return Uuid::RESERVED_NCS;
     }
 }