Question

我有一个问题需要修复该网址重写代码

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]

它适用于以下内容：（whit和whitout结尾“/”）

Test/1234/gotoA/gotoB/
Test/1234/gotoA/
Test/1234/
Test/gotoA/gotoB/

问题是当gotoA以数字例子开头时：

Test/123gotoA

返回：

index.php?m=Test&r=123&a=gotoA&b=

我怎么能解决它？

Answer 1

问题是您/是可选的。这是/(xxx)的整体，应该是可选的。

试试这个：

RewriteRule ^([aA-zZ0-9_-]+)(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$  index.php?m=$1&r=$2&a=$3&b=$4 [QSA]

如果我们将原始正则表达式与Test/123gotoA作为输入，则会发生以下情况：

#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

现在，通过重写正则表达式，情况有所不同：

# before first match
regex: |^([aA-zZ0-9_-]+)(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$
input: |Test/123gotoA
# ^
regex: ^|([aA-zZ0-9_-]+)(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$
input: |Test/123gotoA
# [aA-zZ0-9_-], one or more times, captured: $1 is "Test"
regex: ^([aA-zZ0-9_-]+)|(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$
input: Test|/123gotoA
# Try and find /, then one or more digits, zero or one time: match, $2 is "123"
regex: ^([aA-zZ0-9_-]+)(?:/(\d+))?|(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$
input: Test/123|gotoA
# next group: a / must be found, but the next character is "g": backtrack, $2 is now "12"
regex: ^([aA-zZ0-9_-]+)(?:/(\d+))?|(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$
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-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$
input: Test|/123gotoA
# (?:/(\d+))? is still satified, as it is optional, and $2 is now ""
# Next group: /, followed by [a-zA-Z\d_-] one or more times, captures: $3 is "123gotoA"
regex: ^([aA-zZ0-9_-]+)(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?|(?:/([a-zA-Z\d_-]+))?/?$
input: Test/123gotoA|
# Next group: same as second, but satisfied with an empty match: $4 is ""
regex: ^([aA-zZ0-9_-]+)(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?|/?$
input: Test/123gotoA|
# an optional /: satisified
regex: ^([aA-zZ0-9_-]+)(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?|$
input: Test/123gotoA|
# end of input: satisified
regex: ^([aA-zZ0-9_-]+)(?:/(\d+))?(?:/([a-zA-Z\d_-]+))?(?:/([a-zA-Z\d_-]+))?/?$|
input: Test/123gotoA|
# Match

url-重写如何识别url的一部分是数字还是num + words

1 个答案: