[PHP] PCRE vs. POSIX-extended for regular expressions
Hello The reaseon why PCRE is faster is because the POSIX standard demands to return the longest matching string which means POSIX checks all possible matches while PCRE simply returns the first valid match. In cases where there is no match both have to check all matches. The other thing is, as mentioned before PCRE is a lot more powerfull than POSIX. It contains stuff like look ahead, look behind which POSIX doesn't support. Regards Stefan Langer
Re: [PHP] PCRE vs. POSIX-extended for regular expressions
Pablo Gosse wrote:
> Hi all. Quick quesiton about PCRE vs. POSIX-extended regular
> expressions.
>
> How much of a difference is there between these two types of regular
> expressions. I know I've read that PCRE is faster, but is it that much
> of a difference?
PCRE are _way_ more advanced, I, personally,
prefer them. Read about the syntax in the
fine manual.
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[PHP] PCRE vs. POSIX-extended for regular expressions
Hi all. Quick quesiton about PCRE vs. POSIX-extended regular expressions. How much of a difference is there between these two types of regular expressions. I know I've read that PCRE is faster, but is it that much of a difference? A while ago I had to write a bunch of regular expression patterns for an application and I wrote them using the POSIX-extended functions, but now I'm debating converting them to their PCRE equivalents, because a) it says they are often faster, and b) I want the experience in both. Any thoughts on this? Cheers and TIA, Pablo -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
