[PHP] Error Generated but no error?

[Geoff Martin]

I have a page that receives data from a form. Using $_POST['foo'], I am 
able to use this data in the page but I continually receive an error 
notice (PHP Notice:  Undefined index:  foo  in 
/Library/WebServer/Documents/.. etc).

This happens to all three indices that are passed by this form, yet the 
data IS appearing. How do I prevent these error messages?

Geoff M
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