How to unzip xml file using PHP

I have a zipped XML file on my PHP system.

How do I unzip it to load it into XMLDOM?

I only have one XML file per zip archive.

Thanks in advance.

You can use the php classes ZipArchive and DOMDocument i.e.:

<?php
//set the correct xml headers to output to browser
header("Content-type: text/xml");
$zipFile = "file.zip";
$zip = new ZipArchive;
if ($zip->open($zipFile))
{
    //get the xml filename inside the zip
    $xmlFile =  $zip->getNameIndex(0); //you only  have 1 xml file iside of the zip
    $zip->close();
    //read the xml file inside the zip without extracting it to disk (memory)
    $xml = file_get_contents("zip://$zipFile#$xmlFile");
    //create a new document
    $dom = new DOMDocument('1.0', "UTF-8");
    //load teh xml file
    $dom->loadXML($xml);
    //Here you can  manipulate the XML dom , add, remove nodes, etc.
    //save and echo the XML
    echo $dom->saveXML();
} else {
    echo 'zip open failed failed';
}

Notes:

1. How do I ask a good question?
2. I've tested the code with this xml file and it works as expected.