如何在标记xml之前和之后进行下行

1. 在将标记xml <newWord>写到正确的位置之前，我如何才能下线？并且在标签<Heb>之前

我的代码重写了xml文件，当他添加数据时，他将从js获得的所有数据添加到第一行，这一行将非常长。

我的代码：

<?php
  $wordH=$_GET['varHeb'];
  $wordE=$_GET['varEng'];
  $new_line = "'n";
  $doc='';
    if(!$doc)
    {
        $doc = new DOMDocument();
        // we want a nice output
        $doc->formatOutput = true;
        $doc->load('Dictionary_user.xml');
    }
    $Dictionary_user = $doc->documentElement;
        $newWord = $doc->createElement('newWord');
   CHARSET=windows-1255"');
    $prop = $doc->createElement('Heb', $wordH);
    $newWord->appendChild($prop);
    $prop = $doc->createElement('Eng',$wordE);
    $newWord->appendChild($prop);

    $Dictionary_user->childNodes->item(0)->parentNode->insertBefore($newWord,$Dictionary_user->childNodes->item(0));
    header("Content-type: text/xml");
    $doc->save("Dictionary_user.xml");
echo $doc->saveXML();
?>

糟糕的结果是：

<?xml version="1.0" encoding="UTF-8"?>

<Favorite_Word xml:lang="EN"><newWord><Heb>test1</Heb><Eng>test2</Eng></newWord><newWord><Heb>test1</Heb><Eng>test2</Eng></newWord><newWord><Heb>test1</Heb><Eng>test2</Eng></newWord>测试1test2`

<newWord>
    <Heb>cow</Heb>
    <Eng>Co</Eng>
</newWord>
<newWord>
    <Heb>Camel</Heb>
    <Eng>Ca</Eng>
</newWord>
<newWord>
    <Heb>Bull</Heb>
    <Eng>BUl</Eng>
</newWord>

好的结果是：

<Favorite_Word xml:lang="EN">
<newWord>
    <Heb>test1</Heb>
    <Eng>test2</Eng>
</newWord>
<newWord>
    <Heb>cow</Heb>
    <Eng>Co</Eng>
</newWord>
<newWord>
    <Heb>Camel</Heb>
    <Eng>Ca</Eng>
</newWord>
<newWord>
    <Heb>Bull</Heb>
    <Eng>BUl</Eng>
</newWord>