PHP Search between two points - php

Question

I'm trying to deal with some XML in PHP.
I have code, such as this:
<?php
$stream = fopen("xml","r");
?>
Where "xml" contains something such as this:
<name>name1</name>
<key>key1</key>
<name>name2</name>
<key>key2</key>
etc.
I'd like to create an array out of the contents of the <key> tags, something like where
keys[0] = "key1"
and
keys[1] = "key2"
Any help is appreciated, thank you very much :)
Solution:
$xmlstr = fread($stream,filesize("xml-file"));
$sxe = new SimpleXMLElement($xmlstr);
echo $sxe->getName() . "\n";
foreach ($sxe->children() as $child) {
echo $child->children();
}

Answer 1

You should use DOM functions for this case. Let's suppose a well-formed XML document (xmltest.xml):
<?xml version="1.0" encoding="utf-8"?>
<root>
<name>name1</name>
<key>key1</key>
<name>name2</name>
<key>key2</key>
</root>
This code loads the xml file into DOM document and gets all nodes with tag key;
<?php
$dom = new DOMDocument('1.0','utf-8');
$dom->load('xmltest.xml');
$keys = $dom->getElementsByTagName('key');
for ($i = 0; $i < $keys->length; $i++) {
echo $keys->item($i)->nodeValue . "</br>";
}
?>