Quickly verifying single word.

[Tyson Vanover <tvanover@xxxxxxx>]

I need a quick way to make sure that a string is a 
single word with no white spaces.  I would prefer that 
it is a command that could fit on a single line.  Or at 
least an if block.

I have a few thoughts on this but it involves things 
like explode(), stripslashes(), etc.

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