将子项添加到XML然后转换为CSV

时间:2013-07-05 20:23:50

标签: php xml csv

基本上我有和我转换为CSV的XML文件。这很好但我需要修改它以将同一个子元素添加到每个XML父元素,然后再将其转换为CSV。我似乎只能将其添加到第一个元素,就是这样。有没有办法自动将同一个子项添加到XML文件中的所有元素?

这是XML

我有成千上万的这些。

<Item>
  <product>test</product>
  <Image>AC45G.jpg</Image>
</Item>

这是我的代码

<?php

$new_xml = simplexml_load_file('test.xml');

    $items = $new_xml->Item;

    $items->addChild('distributor', 'test');

function outputCSV($new_xml) {
    $outstream = fopen("php://output", 'w');
    $header=false;
    foreach($new_xml as $k=>$details){

        if(!$header){
            fputcsv($outstream,array_keys(get_object_vars($details)));
            $header=true;
        }
        fputcsv($outstream,get_object_vars($details));
    }
fclose($outstream);  
}


    header("Content-type: text/csv");
    header("Content-Disposition: attachment; filename=lipseys.csv");
    header("Pragma: no-cache");
    header("Expires: 0");

    outputCSV($new_xml);
?>

2 个答案:

答案 0 :(得分:2)

默认情况下,SimpleXML遍历SimpleXMLElement的所有子元素,因此您需要foreach覆盖根元素(在以下示例中名为$element而不是$new_xml作为在你的问题中),然后将新的孩子添加到每个孩子的孩子:

// iterate over child elements
foreach ($element as $child)
{
    $child->addChild('distributor', 'test');
}

SimpleXMLElement::children()方法的区别在于,它将使用 SimpleXMLElement 名称空间而不是给定的名称空间(可选)在children()方法中。

您可以通过在加载文件或实例化SimpleXMLElement时指定迭代来更改默认命名空间。另见:What are the “$ns” and “$is_prefix” parameters about?

用法示例:

$xml = simplexml_load_file('test.xml');

$items = $xml;

foreach ($items as $item) {
    $item->addChild('distributor', 'test: ' . $item);
}

header("Content-type: text/csv");
header("Content-Disposition: attachment; filename=lipseys.csv");
header("Pragma: no-cache");
header("Expires: 0");

$file = new SplFileObject("php://output");
foreach (new ValuesWithHeadersIterator($items) as $values) {
    $file->fputcsv($values);
}

使用的迭代器:

/**
 * Class ValuesIterator
 *
 * Treats each iteration as being (or being cast-able) to an array
 * of values.
 */
class ValuesIterator extends IteratorIterator
{
    public function current() {
        return (array) parent::current();
    }
}

/**
 * Class KeysIterator
 *
 * Returns keys instead of values per each ValuesIterator iteration.
 */
class KeysIterator extends ValuesIterator
{
    public function current() {
        return array_keys(parent::current());
    }
}


/**
 * Class ValuesWithHeadersIterator
 *
 * Same as ValuesIterator but expecting the first values
 * to have keys that can be used as headers
 */
class ValuesWithHeadersIterator extends IteratorIterator
{
    public function __construct(Traversable $iterator) {
        $headers = new LimitIterator(new KeysIterator($iterator), 0, 1);
        $values  = new ValuesIterator($iterator);
        $append  = new AppendIterator();
        $append->append($headers);
        $append->append($values);
        parent::__construct($append);
    }
}

答案 1 :(得分:1)

也许像这样使用children()和foreach

<?php
foreach ($new_xml ->children() as $second_gen){
  $second_gen->addChild('distributor', 'test');
}
?>
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