What's faster using if else or arrays?

[dholmes1031@xxxxxxxxx]

I'm working on a project and I was wondering if I should use if else's or arrays ?? 

Example 

If($foo= 5)
{ 
$dothis
}
ElseIf($foo= 3)
{ 
$dothis
}
Else{ $donothing }

Or put it in some short of arrays and pregmatch what would be the best to use and easiest to read 
Sent via BlackBerry from T-Mobile

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