xmlpp.php

#!/usr/bin/env php
<?php

// Check the scripts is called with arguments
if (empty($argv[1])) {
    die('You must specify a file!');
}

// Set the file name
$file = $argv[1];

// Verify if filename exists
if (!is_readable($file)) {
    die('File is missing or is not readable!');
}

// Get the file content
$content = file_get_contents($file);

// Verify the content is not empty
if (empty($content)) {
    die('File is empty nothing to do ;)');
}

// Decode html entities
$content = html_entity_decode($content);

// Parse the xml and format it
$doc = new DOMDocument();
$doc->preserveWhiteSpace = false;
$doc->formatOutput = true;
$doc->loadXML($content);

// Print the result
echo $doc->saveXML();