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I believe I found an error in the digital online copy. It is in Chapter 2 under "Handling an HTML Form". Paragraph 3 reads:

PHP is case-sensitive when it comes to variable names, so $_REQUEST[‘city’] will work, but $_REQUEST[‘city’] and $_REQUEST[‘city’] will have no value.

I'm not seeing any difference in the three variable names. I believe this sentence needs to be fixed. 

Edited by MelissaMMDP

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Yeah, sorry about that. Those should be using different cases. Thanks for reporting! Also, could you clarify what you mean by "digital online copy" so I can make sure it gets fixed? 

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