What function does PHP_Self?

[Anon]

I´m trying to
make a form for
input information to the
database.

I only have 1 input field
and still, when I try to
run the script I keep getting
my Error in

if (!$field)
$error = blablabla..

And I don´t know what the
PHP_Self variable do in:

<form method="post" action= "<?php echo $PHP_SELF ?>">

Is this the problem, or is it something else?, and is there anyone who knows where the problem is?, thanks!
/Sebbe

[Anon]

$PHP_SELF is the variable for the name of the PHP script itself.

For example you have a script name foo.php3:

<?

print "$PHP_SELF";

?>

prints foo.php3.

---

Jeroen Geusebroek

[Anon]

If you pass a variable such as

foo.php?file=frontpage

and you run $PHP_SELF on it
it returns

foo.php?file=frontpage

so if you have the setup:
echo "$PHP_SELF?file=frontpage";

for a link,
and you keep cliking that link, you get:
$PHP_SELF?file=frontpage
$PHP_SELF?file=frontpagefile=frontpage
$PHP_SELF?file=frontpagefile=frontpagefile=frontpage

etc. Which messes things up.

Also, if you use $PHP_SELF inside a function, it brings up a low-level error saying $PHP_SELF doesn't exist. Which is just kinda annoying when your trying to debug something.