checking a variable being passed

[mpgalvin]

I use forms to post values to a page, but I quite often use links for the same purpose (for example, paging a db). This means that for every

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if (isset($HTTP_POST_VARS['value']))

I have to have a

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if (isset($HTTP_GET_VARS['value']))

Is there a better way of doing this (without making the assumption that $value will always exist regardless of whether it's posted or sent in a link?

[Redcircle]

I believe pre 4.1 $HTTP_REQUEST_VARS post 4.1 you can use the superglobal $_REQUEST.. I would reccomend the later of the two