PHP-Script to auto-format (valid) XML using PHP's DOM

formatXml.php

#!/usr/bin/php5
<?php

if (!isset($argv)||$argc!=2||$argv[1]=='-h'||$argv[1]=='--help') {
	echo <<<EOH
usage :
formatXMLNicely.php unformated.xml > formated.xml

EOH;
} else {
	$file=$argv[1];
	if (file_exists($file)) {
		if (is_file($file)) {
			$xml = simplexml_load_file($argv[1]);
			
			$doc = new DOMDocument('1.0');
			$doc->formatOutput = true;
			if ($domnode = dom_import_simplexml($xml)) { 
				$domnode = $doc->importNode($domnode, true);
				$domnode = $doc->appendChild($domnode);
				echo $doc->saveXML();
			} else {print ("Error while parsing. \n");}
		} else {echo "Error: \"$file\" is a directory. \n";}
	} else {echo "Error: No such file or directory: \"$file\" \n";}
}