These will match identically.

The only difference will be the second will set $1 to 123456789, the first will not.

Brackets are only needed if you either want to capture part of the match into $1 etc, or you want to match against multiple possibilities (this|orthis).


On 11 January 2014 08:03, Richard Mace <richard.mace@gmail.com> wrote:
Hi,
When you are setting up an inbound route, should you put brackets round the  destination_number or not? 

That is, which of theses entries is correct/safer/will work?
    <condition field="destination_number" expression="^123456789$> 


or
     <condition field="destination_number" expression="^(123456789)$>

Thanks in advance

Richard

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