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07-11-2009, 09:12 PM
Join Date: Jun 2008
$_POST is what is known as a
and contains what is known as
which is ordinarily sent via form submition.
is a function used to check if a variable has been set or not
In this case we're checking if a value has not been set for the $_POST['submit'] and if it's not preform the actions lying betwixt the brackets.
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