Support for internal classes providing __set_state() implementation (#10

) (#11)

README.md

@@ -494,7 +494,7 @@ try {
 
 ## Limitations
 
-- Exporting internal classes other than `stdClass` and `Closure` is currently not supported. `VarExporter` will throw an `ExportException` if it finds one.
+- Exporting internal classes other than `stdClass` and `Closure`, and classes implementing `__set_state()` (most notably DateTime classes) is currently not supported. `VarExporter` will throw an `ExportException` if it finds one.
 
   To avoid hitting this brick wall, you can implement `__serialize()` and `__unserialize()` in classes that contain references to internal objects.
 

src/Internal/GenericExporter.php

@@ -63,12 +63,12 @@ public function __construct(int $options)
             $this->objectExporters[] = new ObjectExporter\ClosureExporter($this);
         }
 
-        $this->objectExporters[] = new ObjectExporter\InternalClassExporter($this);
-
         if (! ($options & VarExporter::NO_SET_STATE)) {
             $this->objectExporters[] = new ObjectExporter\SetStateExporter($this);
         }
 
+        $this->objectExporters[] = new ObjectExporter\InternalClassExporter($this);
+
         if (! ($options & VarExporter::NO_SERIALIZE)) {
             $this->objectExporters[] = new ObjectExporter\SerializeExporter($this);
         }

tests/VarExporterTest.php

@@ -151,6 +151,42 @@ public function testInlineNumericScalarArray()
         $this->assertExportEquals($expected, $var, VarExporter::INLINE_NUMERIC_SCALAR_ARRAY);
     }
 
+    public function testExportDateTime()
+    {
+        $timezone = new \DateTimeZone('Europe/Berlin');
+        $format = 'Y-m-d H:i:s.u';
+
+        $var = \DateTime::createFromFormat($format, '2020-03-09 18:51:23.000000', $timezone);
+
+        $expected = <<<'PHP'
+\DateTime::__set_state([
+    'date' => '2020-03-09 18:51:23.000000',
+    'timezone_type' => 3,
+    'timezone' => 'Europe/Berlin'
+])
+PHP;
+
+        $this->assertExportEquals($expected, $var);
+    }
+
+    public function testExportDateTimeImmutable()
+    {
+        $timezone = new \DateTimeZone('Europe/Berlin');
+        $format = 'Y-m-d H:i:s.u';
+
+        $var = \DateTimeImmutable::createFromFormat($format, '2020-03-10 17:06:19.000000', $timezone);
+
+        $expected = <<<'PHP'
+\DateTimeImmutable::__set_state([
+    'date' => '2020-03-10 17:06:19.000000',
+    'timezone_type' => 3,
+    'timezone' => 'Europe/Berlin'
+])
+PHP;
+
+        $this->assertExportEquals($expected, $var);
+    }
+
     public function testExportInternalClass()
     {
         $object = new \stdClass;