Editing Pages Using PHP

[flame_211]

Argh.... Everytime I try to save a page using this PHP codeing:

<?php
if( isset( $_POST["code"] ) ){
 $f = fopen( "ftp://me:[email protected]/index.php", "w" );
 fwrite( $f, $_POST["code"] );
}
?>
<form action="<?=$_SERVER["PHP_SELF"]?>" method="post">
<textarea name="code" rows=20 cols=80><?php readfile( "index.php" ); ?></textarea><br />
<input type="submit" value="Save it, baby!">
</form>

I get this error message:
Warning: fopen("ftp://[email protected]/index.php", "w") - Success in /home/alltom/public_html/flame/editpg.php on line 3
Warning: fwrite(): supplied argument is not a valid File-Handle resource in /home/alltom/public_html/flame/editpg.php on line 4

I originally had fputs, but it didnt work either... :'( please help me...