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I'm having some trouble with something....

Here is some code i wrote just to give an example:

$output = $_POST['output'];

if ($output == "nothing") {
$output = 0;

if ($output == "something") {

echo <<<HERE
<form method="POST" action="forms.php" name="f">
<input type="text" name="output" value="">
<input type="submit" name="submit" value="Submit!">

In this form if you enter the word 'something' into the text input it will echo "Hello". If you enter the word 'nothing' it will set the the variable $output to 0, but then for some reason "Hello" is echoed.

Why is this, and what ways are there to stop this?

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Well, your actually setting the comparasor test to if(0 == "something") - always returning true

This works, setting to false instead

[color=blue]if ($output == "nothing") {
$output = false;

if ($output == "something") {
echo"< br >Hello";

But if your purpose with this is to check if formfields are submitted empty or not, use

// not empty
// empty

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