Simple CHMOD

<?php

echo '<form action="" method="post">
<input type="txt" name="patch" value="'.getcwd().'\namafile.php">
<select name="chmod">
    <option value="0600">0600</option>
    <option value="0644">0644</option>
    <option value="0755">0755</option>
    <option value="0750">0750</option>
</select>
<input type="submit" name="submit" value="CHMOD">
</form>';

if($_POST['submit']){
if(chmod($_POST['patch'], $_POST['chmod'])){
    echo "Success di chmod";
}else{
    echo "Gagal";
}
}
?>