Merge pull request #2857 from hettiger/feature/var-export-support-on-…

…intervals

Add `var_export()` support for `CarbonInterval`

src/Carbon/CarbonInterval.php

@@ -772,6 +772,23 @@ public static function __callStatic($method, $parameters)
         }
     }
 
+    /**
+     * Evaluate the PHP generated by var_export() and recreate the exported CarbonInterval instance.
+     *
+     * @param array $dump data as exported by var_export()
+     *
+     * @return static
+     */
+    #[ReturnTypeWillChange]
+    public static function __set_state($dump)
+    {
+        /** @noinspection PhpVoidFunctionResultUsedInspection */
+        /** @var DateInterval $dateInterval */
+        $dateInterval = parent::__set_state($dump);
+
+        return static::instance($dateInterval);
+    }
+
     /**
      * Return the current context from inside a macro callee or a new one if static.
      *

tests/CarbonInterval/SetStateTest.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of the Carbon package.
+ *
+ * (c) Brian Nesbitt <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Tests\CarbonInterval;
+
+use Carbon\CarbonInterval;
+use Tests\AbstractTestCase;
+
+class SetStateTest extends AbstractTestCase
+{
+    public function testEvaluatingVarExportReturnsCarbonIntervalInstance()
+    {
+        $export = var_export(CarbonInterval::minutes(3), true);
+
+        $this->assertInstanceOfCarbonInterval(eval("return $export;"));
+    }
+
+    public function testStateIsPreserved()
+    {
+        $serializedInterval = CarbonInterval::minutes(3);
+        $export = var_export($serializedInterval, true);
+
+        /** @var CarbonInterval $deserializedInterval */
+        $deserializedInterval = eval("return $export;");
+
+        $this->assertTrue($deserializedInterval->eq($serializedInterval));
+    }
+}