<?php
header("Content-type: text/plain;");
$log = array();

/**
 * Changes files extensions.
 *
 * @param string $path
 * @param string $old_ext
 * @param string $new_ext
 * @param bool $include_sub_dirs
 */
function replace_ext($path, $old_ext, $new_ext, $include_sub_dirs = false)
{
	global $log;
	
	foreach (glob($path."*") as $file)
	{
		if (is_dir($file))
		{
			if ($include_sub_dirs)
			{
				replace_ext($file);
			}
			else
			{
				continue;
			}
		}
		else
		{			
			if (substr($file, strrpos($file, '.') + 1) == $old_ext)
			{
				$log[] = array('name' => $file,
						'newname' => substr($file, 0, strrpos($file, '.')), 
						'ext' => substr($file, strrpos($file, '.') + 1));
				$last_item = $log[count($log)-1];

				rename($last_item['name'], $last_item['newname'].'.'.$new_ext);
			}
		}
	}
}

replace_ext("./", "htm", "html");
print_r($log);
?>