i) 难以确定这种ur改法
RewriteRule ^([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$ index.php?m=$1&r=$2&a=$3&b=$4 [QSA]
它很好地完成了这些工作:(打断和鞭)......”
Test/1234/gotoA/gotoB/
Test/1234/gotoA/
Test/1234/
Test/gotoA/gotoB/
问题何时发生。 一开始是几个例子:
Test/123gotoA
返回:
index.php?m=Test&r=123&a=gotoA&b=
如何确定?
The problem is that you make the / optional. It is the whole of /(xxx) which should be made optional.
为此:
RewriteRule ^([aA-zZ0-9_-]+)(?:/(d+))?(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$ index.php?m=$1&r=$2&a=$3&b=$4 [QSA]
如果我们以<条码”取代你原来的规章。 测试/123gotoA作为投入,这里的情况是:
#before first match
regex: |^([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$
input: |Test/123gotoA
# ^
regex: ^|([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$
input: |Test/123gotoA
# [aA-zZ0-9_-], once or more, captured: $1 is "Test"
regex: ^([aA-zZ0-9_-]+)|/?([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$
input: Test|/123gotoA
# /?: a / is found
regex: ^([aA-zZ0-9_-]+)/?|([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$
input: Test/|123gotoA
# [0-9], zero or more times, captured: $2 is "123"
regex: ^([aA-zZ0-9_-]+)/?([0-9]*)|/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$
input: Test/123|gotoA
# /?: no /, but satisified, since ? can match zero times
regex: ^([aA-zZ0-9_-]+)/?([0-9]*)/?|([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$
input: Test/123|gotoA
# [A-Za-z0-9_-], zero or more times, captured: $3 is "gotoA"
regex: ^([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)|/?([A-Za-z0-9_-]*)/?$
input: Test/123gotoA|
# /?: no /, but satisified, since ? can match zero times
regex: ^([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)/?|([A-Za-z0-9_-]*)/?$
input: Test/123gotoA|
# [A-Za-z0-9_-], zero or more times, captured: $4 is ""
regex: ^([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)|/?$
input: Test/123gotoA|
# /?: no /, but satisified, since ? can match zero times
regex: ^([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?|$
input: Test/123gotoA|
# $: satisified, since this is the end of input
regex: ^([aA-zZ0-9_-]+)/?([0-9]*)/?([A-Za-z0-9_-]*)/?([A-Za-z0-9_-]*)/?$|
input: Test/123gotoA|
# end of match: success
如今,经改写后,情况不同:
# before first match
regex: |^([aA-zZ0-9_-]+)(?:/(d+))?(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$
input: |Test/123gotoA
# ^
regex: ^|([aA-zZ0-9_-]+)(?:/(d+))?(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$
input: |Test/123gotoA
# [aA-zZ0-9_-], one or more times, captured: $1 is "Test"
regex: ^([aA-zZ0-9_-]+)|(?:/(d+))?(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$
input: Test|/123gotoA
# Try and find /, then one or more digits, zero or one time: match, $2 is "123"
regex: ^([aA-zZ0-9_-]+)(?:/(d+))?|(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$
input: Test/123|gotoA
# next group: a / must be found, but the next character is "g": backtrack, $2 is now "12"
regex: ^([aA-zZ0-9_-]+)(?:/(d+))?|(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$
input: Test/12|3gotoA
# but here again the next character is not a /: the engine must backtrak again, until:
regex: ^([aA-zZ0-9_-]+)(?:/(d+))?|(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$
input: Test|/123gotoA
# (?:/(d+))? is still satified, as it is optional, and $2 is now ""
# Next group: /, followed by [a-zA-Zd_-] one or more times, captures: $3 is "123gotoA"
regex: ^([aA-zZ0-9_-]+)(?:/(d+))?(?:/([a-zA-Zd_-]+))?|(?:/([a-zA-Zd_-]+))?/?$
input: Test/123gotoA|
# Next group: same as second, but satisfied with an empty match: $4 is ""
regex: ^([aA-zZ0-9_-]+)(?:/(d+))?(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?|/?$
input: Test/123gotoA|
# an optional /: satisified
regex: ^([aA-zZ0-9_-]+)(?:/(d+))?(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?|$
input: Test/123gotoA|
# end of input: satisified
regex: ^([aA-zZ0-9_-]+)(?:/(d+))?(?:/([a-zA-Zd_-]+))?(?:/([a-zA-Zd_-]+))?/?$|
input: Test/123gotoA|
# Match
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