unzipper

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-UK">
    <head>
        <title>Billy's Unzipper Script</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <meta name="generator" content="thekid" />
        <meta name='robots' content='noindex,nofollow' />
    </head>
    <body>
        <?php
            $file = $_GET['file'];
            $removeorig = $_GET['removeorig'];
            $unzipper = $_GET['unzipper'];
            if (isset($file))
            {
                echo "Unzipping " . $file . "...<br />\n";
                system('unzip -o ' . $file);
                echo "<hr />\n";
                if (isset($removeorig)) {
                    echo "Deleting Zip...<br />\n";
                    unlink("$file");
                }
            }
            if (isset($unzipper)) {
                echo "Deleting Script...<br />\n";
                unlink(__FILE__);
                echo "Script Deleted!<br /><a href=\"/\">HOME</a>\n";
                exit;
            }
            $handler = opendir(".");
            echo "Please choose a file to unzip: <br />\n";
            echo '<form action="" method="get">'."\n";
            $found = 0;
            while ($file = readdir($handler))
            {
                     if(strrchr($file,".zip") != ".zip" ) { continue; }
                {
                    echo '<input type="radio" name="file" value="' . $file . '"/> ' . $file . "<br />\n";
                    $found = 1;
                }
            }
            echo '<hr/><input type="checkbox" name="removeorig" value="Remove" />Delete .zip after extraction?'."<br />\n";
            echo '<input type="checkbox" name="unzipper" value="Remove" checked="checked" />Delete Unzipper Script? (Uncheck this box if you have more files to unzip!)'."<br />\n";
            closedir($handler);
            if ($found == FALSE)
                echo "No .zips found<br />";
            else
                echo '<br />NOTE: This unzips and <strong>REPLACES</strong> files.<br /><br /><input type="submit" value="Unzip!" />';

            echo "\n</form>";
        ?>
        <p><a href="http://validator.w3.org/check?uri=referer"><img src="http://www.w3.org/Icons/valid-xhtml10" alt="Valid XHTML 1.0 Transitional" height="31" width="88" /></a></p>
    </body>
</html>