Re: Combining 2 preg matches.


Chung Leong wrote:
Rik wrote:
It just occured to me that, allthough a wonderfull example:

$regex ='/^(?:[a-z]|[a-z][_\-][a-z])+$/';

...will do just fine.

equally so:
$regex ='/^(?:[a-z]+(?:[_\-][a-z]+))+$/';

Lookahead & -behind are unneccessary in this case, and this keep it simple.

Good point. It doesn't make sense to use assertions when you'll capture
the matches anyway.

Somehow, i believe Rik's solution, gave me problems ...

'/^(?:[a-z0-9]|[a-z0-9][_\-][a-z0-9])+$/'; gave problems.
'/^(?:[a-z0-9]|(?<=[a-z0-9])[-_](?=[a-z0-9]))+$/' didn't.

An example string that gave problems is:
really_a_made_up_string

So i used Chung's option.

Frizzle.

.

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