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One-time Popups with PHP & Javascript

Description:

This is a PHP snippet to generate a popup window one time per visitor. It uses a session variable to determine if the visitor has already received the popup. It isn't the most straightforward way of achieving this effect, at the time it was written I didn't want to fool with (in terms of debugging especially) a pure-javascript solution. Javascript is only used to launch the window itself.

Downloads:

onetimepopup.inc (plain text)

Download (zipped, with example files)