Proper way to remove an element from an array

["Dan" <frozendice@xxxxxxxxx>]

I know in some languages there's a right way to remove an element from an 
array and other ways that will give you problems.

In PHP can I just set $arrayname[key] = null?  Or will I then end up with 
key => null as a value.  I looked on php.net under array functions for a bit 
and I didn't find any sort of remove element function.  I've just never 
needed to do this before.

- Dan 

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