沒有格式化的附加節點

Question

我做了一個PHP腳本，通過添加新節點來更新現有的XML文件。問題是新節點沒有格式化。他們寫在一行。這裏是我的代碼：

$file = fopen('data.csv','r'); 
$xml = new DOMDocument('1.0', 'utf-8'); 
$xml->formatOutput = true; 

$doc = new DOMDocument(); 
$doc->loadXML(file_get_contents('data.xml')); 
$xpath = new DOMXPath($doc); 
$root = $xpath->query('/my/node'); 
$root = $root->item(0); 
$root = $xml->importNode($root,true); 

// all the tags created in this loop are not formatted, and written in a single line 
while($line=fgetcsv($file,1000,';')){ 
    $tag = $xml->createElement('cart'); 
    $tag->setAttribute('attr1',$line[0]); 
    $tag->setAttribute('attr2',$line[1]); 
    $root->appendChild($tag); 
} 
$xml->appendChild($root); 
$xml->save('updated.xml'); 

我該如何解決這個問題？

Answer 1

嘗試將preserveWhiteSpace = FALSE;添加到存儲文件的DOMDocument對象。

$xml = new DOMDocument('1.0', 'utf-8'); 
$xml->formatOutput = true; 

$doc = new DOMDocument(); 
$doc->preserveWhiteSpace = false; 
$doc->loadXML(file_get_contents('data.xml')); 
$doc->formatOutput = true; 

... 

PHP.net - DOMDocument::preserveWhiteSpace