Implement SplObjectStorage::getInfo()

Implement SplObjectStorage::getInfo(). PHPUnit requires this method.

hphp/system/php/spl/datastructures/SplObjectStorage.php

@@ -356,4 +356,16 @@ class SplObjectStorage
     current($this->storage)['inf'] = $data;;
   }
 
+
+  /**
+   * ( excerpt from http://php.net/manual/en/splobjectstorage.getinfo.php )
+   *
+   * Returns the data associated with the current iterator entry.
+   *
+   * @return     mixed   Returns the data, or info, associated with the
+   *                     object pointed by the current iterator position.
+   */
+  public function getInfo() {
+    return current($this->storage)['inf'];
+  }
 }

hphp/test/slow/ext_spl_object_storage/getInfo.php

@@ -0,0 +1,22 @@
+<?php
+// Test code from: http://www.php.net/manual/en/splobjectstorage.getinfo.php
+
+$s = new SplObjectStorage();
+
+$o1 = new StdClass;
+$o2 = new StdClass;
+
+$s->attach($o1, "d1");
+$s->attach($o2, "d2");
+
+$s->rewind();
+while($s->valid()) {
+    $index  = $s->key();
+    $object = $s->current(); // similar to current($s)
+    $data   = $s->getInfo();
+
+    var_dump($object);
+    var_dump($data);
+    $s->next();
+}
+?>

hphp/test/slow/ext_spl_object_storage/getInfo.php.expectf

@@ -0,0 +1,6 @@
+object(stdClass)#2 (0) {
+}
+string(2) "d1"
+object(stdClass)#3 (0) {
+}
+string(2) "d2"

hphp/test/zend/good/ext-spl/SplObjectStorage_getInfo_empty_storage.php

@@ -4,4 +4,4 @@ $s = new SplObjectStorage();
 
 var_dump($s->getInfo());
 
-?>
+?>