diff --git a/src/SplArray.php b/src/SplArray.php
index 4b949af..4406f2a 100644
--- a/src/SplArray.php
+++ b/src/SplArray.php
@@ -221,7 +221,7 @@ public function values(): SplArray
 
     public function flush():SplArray
     {
-        foreach ($this as $key => $item){
+        foreach ($this->getArrayCopy() as $key => $item){
             unset($this[$key]);
         }
         return $this;
@@ -230,6 +230,7 @@ public function flush():SplArray
     public function loadArray(array $data)
     {
         parent::__construct($data);
+        return $this;
     }
 
     /*
@@ -269,7 +270,7 @@ public function addCData($cdata_text) {
                     }
                     $parser($ch,$v);
                 } else {
-                    if (is_numeric($v)){
+                    if (is_numeric($k)){
                         $xml->addChild($k, $v);
                     }else{
                         if($CD_DATA){