ñǩʽ
{$uid} //ID

{$page} //ҳ

{$username} //û

(.*?) //ȡ

\d{6} //ֶ̬

?=\?

.=\.

*=\*

(=\(

)=\)

$=\$

['\"]='"

[^\s]*=ı

[\s\S]*?=кͿ


ʽ˵:
\
----------------------------------------------------------------------------
һַΪֵַ"n"ַ"n"ƥ䡣"\n"뻻зƥ䡣"\\""\"ƥ棬"\(""("ƥ䡣

^
----------------------------------------------------------------------------
ƥĿʼλá

$
----------------------------------------------------------------------------
ƥĽβ

*
----------------------------------------------------------------------------
ƥǰһַλ򼸴Ρ磬"zo*"ƥ"z""zoo"

+
----------------------------------------------------------------------------
ƥǰһַһλΡ磬"zo+"ƥ"zoo",ƥ"z"

?
----------------------------------------------------------------------------
ƥǰһַλһΡ磬"a?ve?"ƥ"never"е"ve"

.
----------------------------------------------------------------------------
ƥ任зκַ

(pattern)
----------------------------------------------------------------------------
ģʽƥ䲢סƥ䡣ƥַԴΪMatchesʹItem[0]...[n]ȡáҪƥַ()ʹ"\(""\)"

x|y
----------------------------------------------------------------------------
ƥxy"z|food"ƥ"z""food""(z|f)ood"ƥ"zoo""food"

{n}
----------------------------------------------------------------------------
nΪǸƥǡnΡ磬"o{2}""Bobе"o"ƥ䣬ǿ"foooood"еǰoƥ䡣

{n,}
----------------------------------------------------------------------------
nΪǸƥnΡ磬"o{2,}"ƥ"Bob"е"o"ƥ"foooood"еo"o{1,}"ȼ"o+""o{0,}"ȼ"o*"

{n,m}
----------------------------------------------------------------------------
mnΪǸƥnΣmΡ磬"o{1,3}"ƥ"fooooood"ǰo"o{0,1}"ȼ"o?"

[xyz]
----------------------------------------------------------------------------
һַַ֮һƥ䡣磬"[abc]"ƥ"plain"е"a"

[a-z]
----------------------------------------------------------------------------
ʾĳΧڵַָڵκַƥ䡣磬"[a-z]"ƥ"a""z"֮κһСдĸַ

[^xyz]
----------------------------------------------------------------------------
һ񶨵ַƥ䲻ڴеκַ磬"[^abc]"ƥ"plain"е"p".

[^m-z]
----------------------------------------------------------------------------
񶨵ַ䡣벻ָڵַƥ䡣磬"[m-z]"벻"m""z"֮κַƥ䡣

\b
----------------------------------------------------------------------------
뵥ʵı߽ƥ䣬ո֮λá磬"er\b""never"е"er"ƥ䣬ǲƥ"verb"е"er"

\B
----------------------------------------------------------------------------
ǵʱ߽ƥ䡣"ea*r\B""neverearly"е"ear"ƥ䡣

\d
----------------------------------------------------------------------------
һַƥ䡣ȼ[0-9]

\D
----------------------------------------------------------------------------
ֵַƥ䡣ȼ[^0-9]

\f
----------------------------------------------------------------------------
ҳƥ䡣

\n
----------------------------------------------------------------------------
뻻зַƥ䡣

\r
----------------------------------------------------------------------------
سַƥ䡣

\s
----------------------------------------------------------------------------
κΰַƥ䣬ոƱҳȡȼ"[\f\n\r\t\v]"

\S
----------------------------------------------------------------------------
κηǿհ׵ַƥ䡣ȼ"[^\f\n\r\t\v]"

\t
----------------------------------------------------------------------------
Ʊƥ䡣

\v
----------------------------------------------------------------------------
봹ֱƱƥ䡣

\w
----------------------------------------------------------------------------
κεַƥ䣬»ߡȼ"[A-Za-z0-9_]"

\W
----------------------------------------------------------------------------
κηǵַƥ䡣ȼ"[^A-Za-z0-9_]"

\num
----------------------------------------------------------------------------
ƥnumnumΪһûصסƥ䡣磬"(.)\1"ƥַͬ

\n
----------------------------------------------------------------------------
ƥnnһ˽ƻֵ˽ƻֵ1,23ֳ磬"\11""\011"һƱƥ䡣"\0011"ȼ"\001""1"˽ƻֵó256ֻǰַΪʽһ֡ʽʹASCII롣