Merge branch 'issubclassof' of https://github.com/prolic/zf2

src/SubClass.php

@@ -0,0 +1,47 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ * @package   Zend_Stdlib
+ */
+
+namespace Zend\Stdlib;
+
+use ReflectionClass;
+
+/**
+ * @see https://bugs.php.net/bug.php?id=53727
+ *
+ * @category   Zend
+ * @package    Zend_Stdlib
+ * @subpackage SubClass
+ */
+abstract class SubClass
+{
+
+    /**
+     * Checks if the object has this class as one of its parents
+     *
+     * @see https://bugs.php.net/bug.php?id=53727
+     *
+     * @param string $className
+     * @param string $type
+     */
+    public static function isSubclassOf($className, $type)
+    {
+        if (version_compare(PHP_VERSION, '5.3.7', '>=')) {
+            return is_subclass_of($className, $type);
+        }
+        if (is_subclass_of($className, $type)) {
+            return true;
+        }
+        if (!interface_exists($type)) {
+            return false;
+        }
+        $r = new ReflectionClass($className);
+        return $r->implementsInterface($type);
+    }
+}

test/SubClassTest.php

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+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ * @package   Zend_Stdlib
+ */
+
+namespace ZendTest\Stdlib;
+
+use Zend\Stdlib\SubClass;
+
+class SubClassTest extends \PHPUnit_Framework_TestCase
+{
+    protected function setUp()
+    {
+        require_once 'TestAsset/DummySubclasses.php';
+    }
+
+    public function testIsSubclassOf()
+    {
+        $test1 = SubClass::isSubclassOf('ZendTest\Stdlib\TestAsset\ChildClass', 'ZendTest\Stdlib\TestAsset\TestInterface');
+        $test2 = SubClass::isSubclassOf('ZendTest\Stdlib\TestAsset\ParentClass', 'ZendTest\Stdlib\TestAsset\TestInterface');
+        $this->assertTrue($test1);
+        $this->assertTrue($test2);
+    }
+
+}

test/TestAsset/DummySubclasses.php

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+<?php
+
+namespace ZendTest\Stdlib\TestAsset
+{
+    interface TestInterface
+    {
+    }
+
+    class ParentClass implements TestInterface
+    {
+    }
+
+    class ChildClass extends ParentClass
+    {
+    }
+}