PHP 태그 연습장

<title>TAG WorkBook</title>

<?
$tag = $_POST["TAG"];
$filename = $_POST["FILENAME"];
$ulflag = $_POST["UNLINKFLAG"];

echo "<font face='verdana' size=2pt>TAG WorkBook</font><br/><hr><p/>";
echo "<form method=post action=".$_SERVER["PHP_SELF"].">";

if($tag)
{
        echo $tag;
        if($filename)
        {
                if(!$fp=fopen("./html/$filename","w+"))
                        die("FILEOPEN Failed!");
                fwrite($fp,$tag);
                fclose($fp);
                echo "<font face='verdana' size=2pt><p/><hr><br><a href='./html/$filename'>SOURECE</a> | ";
                echo "<input type=checkbox name=UNLINKFLAG>Check unlink ! | ";
        //      echo "<a href='".$_SERVER["PHP_SELF"]."'>RETURN to WorkBook</a></font>";
                echo "<input type=hidden name=FILENAME value=$filename>";
                echo "<input type=submit value='Return to WorkBook' ";
                echo " style='height:15px;border:0;background-color:#ffffff;'>";
        }
}
else
{
        if($ulflag)
                unlink("./html/$filename");
        echo "<textarea name='TAG' rows=30 cols=80>";

        echo "</textarea><p/>";
        echo "<input type=text size=30 name='FILENAME'>&nbsp;<input type=submit value='GO!' size=10>";
}
echo "</form>";
?>