* 3.1:
[Routing] Fail properly when a route parameter name cannot be used as a PCRE subpattern name
[FrameworkBundle] Improve performance of ControllerNameParser
Update documentation link to the component
[HttpFoundation] Add links to RFC-7231
[DI] Initialize properties before method calls
Tag missing internals
[WebProfilerBundle] Dont use request attributes in RouterController
Fix complete config tests
As explained in #6775, this has been done for the following reasons:
1. It's also Request::getHost()
2. The term hostname has been obsoleted in
http://tools.ietf.org/html/rfc3986#appendix-D.2 and uses the host only
3. hostname in the RFC was defined as the registered domain name, but we
probably also want to match IP-Adresses with the pattern which is the
host = IP-literal / IPv4address / reg-name for.
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]`.
