XML到CSV，只能获得一行？

Question

我遇到了这个XML到CSV脚本的问题..当我删除标题的一切回声，但与他们我只得到CSV文件的最后一行。我关掉E_NOTICE警告，因为并非所有的delivery-requests都有customer-ref1，我不确定如何测试此isset()似乎不起作用。我怀疑它可能是问题的一部分..无论如何，这里的代码：

<?php 
error_reporting(E_ALL^E_NOTICE); 
if (isset($_FILES) && isset($_POST['submit'])) { 
    $page = file_get_contents($_FILES['import']['tmp_name']); 
    $doc = new DOMDocument(); 
    $doc->loadXML($page); 
    $delivery_requests = $doc->getElementsByTagName("delivery-request"); 
    $count=0;        
    foreach ($delivery_requests as $delivery_request) { 
     $count++; 
     $product_id = $delivery_request->getElementsByTagName("product-id")->item(0)->nodeValue; 
     $weight = $delivery_request->getElementsByTagName("weight")->item(0)->nodeValue; 
     $customer_ref1 = $delivery_request->getElementsByTagName("customer-ref1")->item(0)->nodeValue; 
     $pre_tax_amount = $delivery_request->getElementsByTagName("pre-tax-amount")->item(0)->nodeValue; 
     $item_id = $delivery_request->getElementsByTagName("pre-tax-amount")->item(0)->nodeValue; 
     $mailing_date = $delivery_request->getElementsByTagName("mailing-date")->item(0)->nodeValue; 
     ob_clean(); 
     header("Cache-Control: public"); 
     header("Content-Description: File Transfer"); 
     header("Content-Disposition: attachment; filename=export.csv"); 
     header("Content-Type: application/octet-stream"); 
     header("Content-Transfer-Encoding: binary"); 
     echo $product_id . "," . $weight . "," . $customer_ref1 . "," . $pre_tax_amount . "," . $item_id . "," . $mailing_date . "\n";  
    }            
    exit; 
} else { 
?> 
    <h2>Import XML<h2> 
    <form action="import.php" method="post" enctype="multipart/form-data"> 
     <input type="file" name="import"> 
     <input type="submit" name="submit" value="Import"> 
     <input type="button" value="Cancel" onclick="window.location='import.php'"> 
    </form> 
<?php 
} 
?> 

一如既往 - 谢谢！

Answer 1

您需要将输出缓冲区调用和头调用移出foreach循环。

是否按预期工作，如果你移动

ob_clean(); 
header("Cache-Control: public"); 
header("Content-Description: File Transfer"); 
header("Content-Disposition: attachment; filename=export.csv"); 
header("Content-Type: application/octet-stream"); 
header("Content-Transfer-Encoding: binary"); 

圈外的？失踪customer-ref1怎么样？