Php Unzip

/***************************************************
* Function to unzip a file zipped with PHP's ZipArchive.
* Parameters Expected:
*	$zip_file: The zip file (with path) we wish to unzip
*	$directory: Where we want the contents unzipped to	
**************************************************/
function unZipArchive($zip_file,$directory)
{
	//create a new ZipArchive class
	$zip_archve = new ZipArchive();	
 
	//attempt to open the archive file
	$results = $zip_archive->open($zip_file);
 
	switch($results)
	{
		case TRUE:  
			//format the directory properly
			  $directory = str_replace("\\","/",$directory);  
			  //extract the files
			  $zip_arvhive->extractTo($directory); 
			  //close the ZipArchive
			  $zip_archive->close(); 
			  //Return True
			  return true;  
			  break;
		case FALSE:	 
			echo "Failed opening archive file. Error Code: " . $results;  
			return false;
	}
}