Get all set POST variables

[rokec]

Is it possible to figure out which variable was set via POST in PHP?

[cameraman]

With the $_POST array
if(isset($_POST['variable_in_question'])) echo "yup";

For your thread title:
foreach($_POST as $vblname => $value) echo $vblname . ' = ' . $value . "<br />\n";
will dump the names which came in from post.

[cmarshall]

No problem.

The superglobal $_POST array contains all POSTed parameters.

ex:

$myparam = $_POST['myparam'];

will contain the value of

<input name="myparam" />

[jatar_k]

echo '<pre>';
print_r($_POST);
echo '</pre>';

that will dump the whole POST array to the browser in a readable way