My benchmarks showed a performance improvement of 20% when matching routes that make use of possesive quantifiers because it prevents backtracking when it's not needed
Commits
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02516de [Routing] fix variable with a requirement of '0'
1f5b793 [Routing] fix setting empty requirement in Route
Discussion
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[Routing] fix setting empty requirement
First commit: A requirement of "^$" was overlooked and wasn't recognized as empty after stripping it in Route.
Second commit: Fixes a requirement of '0' that was ignored by the Compiler.
Commits
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be28e56 [Routing] disallow numeric named variables in pattern
Discussion
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[Routing] compile check for numeric named variables in pattern
Because PHP raises an error for such subpatterns in PCRE and thus would break matching, e.g. this is not allowed as regex `(?<123>.+)`.
So add a compile time check for a non-working pattern like '/{123}'.
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by sstok at 2012-09-06T08:31:42Z
Strangely enough Regex buddy gives no warning or error with the pattern.
Is the name all numeric invalid or just the beginning?
1e4 and 0xFF would be perfectly valid but returns true with is_nummeric()
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by Tobion at 2012-09-06T08:59:07Z
Any numeric is not valid. I guess this limitation is unique to PHP's binding to PCRE.
I think it's because the returned matches array of of preg_match contains both the subpattern as integer index and as named variable. So having a numeric named variable would conflict as `array['1'] === array[1]`.
- The route compiler does not add extra space or line-feed,
- The generated regex does not use the 'x' modified any more,
- The PHP and apache matchers do not need to strip any chars (vs space and line feed before),
- The space characters are escaped according to the apache format
