php static page creation

Build.php

<?php
$base_url = "http://localhost/~username";
$builder = new Build($base_url);
$source = "index.php?about";
$target = "about.html";
$builder->write_file($source, $target);

Class Build
{
	public $url; //base url
	
	function Build($url="http://localhost/")
	{
		$this->url = $url;
	}
	function write_file($source, $destination)
	{
		$sourcepage = $this->url."/$source";
		echo "Grabbing html from $sourcepage<br/>";
		$dynamic_source = fopen($sourcepage, 'r');
		$targetfilename = "../$destination";

		if (!$dynamic_source) {
			die("Unable to load $sourcepage");
		}
		$htmldata = fread($dynamic_source, 1024*1024);
		fclose($dynamic_source);

		$tempfilename = "../tmp/$destination";
		echo "Writing temporary file to $tempfilename<br/>";
		$tempfile = fopen($tempfilename, 'w');
		if (!$tempfile) {
			die("Unable to open temporary file $tempfilename for writing.");
		}
		fwrite($tempfile, $htmldata);
		fclose($tempfile);
		echo "Copying to final location: $targetfilename<br/>";
//you might run into permissions errors here
		copy($tempfilename, $targetfilename);
		echo "$destination updated<br/>";
	}
}
?>