Delete Selected Items From Google Merchant XML - php

Question

i want to remove g:price=0 OR out of stock OR no image ITEMS from my Google Merchant xml feed by PHP.
i'm trying for hours and hours; but could not find a solution yet..
example: (if i have xml like this; the new xml must list only the second item)
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">
<channel>
<title><![CDATA[example title]]></title>
<link><![CDATA[http://www.example.com]]></link>
<description><![CDATA[example description]]></description>
<item>
<g:additional_image_link><![CDATA[]]></g:additional_image_link>
<g:image><![CDATA[]]></g:image>
<g:availability><![CDATA[out of stock]]></g:availability>
<g:price>0.00 TRY</g:price>
</item>
<item>
<g:image><![CDATA[http://www.example.com/image.jpg]]></g:image>
<g:availability><![CDATA[in stock]]></g:availability>
<g:price>100.00 TRY</g:price>
</item>
</channel>
</rss>
Could someone help me? Expected output is this:
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">
<channel>
<title><![CDATA[example title]]></title>
<link><![CDATA[http://www.example.com]]></link>
<description><![CDATA[example description]]></description>
<item>
<g:image><![CDATA[http://www.example.com/image.jpg]]></g:image>
<g:availability><![CDATA[in stock]]></g:availability>
<g:price>100.00 TRY</g:price>
</item>
</channel>
</rss>

Answer 1

Here we are using DOMDocument for extracting nodes and removing un-required nodes.
Try this code snippet here
<?php
ini_set('display_errors', 1);
libxml_use_internal_errors(true);
$string = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">
<channel>
<title><![CDATA[example title]]></title>
<link><![CDATA[http://www.example.com]]></link>
<description><![CDATA[example description]]></description>
<item>
<g:additional_image_link><![CDATA[]]></g:additional_image_link>
<g:image><![CDATA[]]></g:image>
<g:availability><![CDATA[out of stock]]></g:availability>
<g:price>0.00 TRY</g:price>
</item>
<item>
<g:image><![CDATA[http://www.example.com/image.jpg]]></g:image>
<g:availability><![CDATA[in stock]]></g:availability>
<g:price>100.00 TRY</g:price>
</item>
</channel>
</rss>
XML;
$array = array("g:image", "g:price", "g:availability");
$domObject = new DOMDocument();
$domObject->loadXML($string);
$results = $domObject->getElementsByTagName("item");
$nodesToRemove = array();
foreach ($results as $node)
{
foreach ($node->childNodes as $innerNode)
{
if ($innerNode instanceof DOMElement && in_array($innerNode->tagName, $array))
{
if ($innerNode->tagName == "g:image" && empty($innerNode->textContent))
{
$nodesToRemove[] = $innerNode->parentNode;
break;
} elseif ($innerNode->tagName == "g:price" && preg_match("/\b0+(\.[0]+)\b/", $innerNode->textContent))
{
$nodesToRemove[] = $innerNode->parentNode;
break;
} elseif ($innerNode->tagName == "g:availability" && $innerNode->textContent == "out of stock")
{
$nodesToRemove[] = $innerNode->parentNode;
break;
}
}
}
}
foreach ($nodesToRemove as $node)
{
$node->parentNode->removeChild($node);
}
echo $domObject->saveXML();
Output:
<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:g="http://base.google.com/ns/1.0" version="2.0">
<channel>
<title><![CDATA[example title]]></title>
<link><![CDATA[http://www.example.com]]></link>
<description><![CDATA[example description]]></description>
<item>
<g:image><![CDATA[http://www.example.com/image.jpg]]></g:image>
<g:availability><![CDATA[in stock]]></g:availability>
<g:price>100.00 TRY</g:price>
</item>
</channel>
</rss>