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[PHP] 曉銝 pre_match() ----急迤閬銵函內撘

[銴鋆賡包
頝唾唳摰璅撅
璅銝
潸” 2015-7-2 13:09:55 | 芰閰脖 撣 |摨閬 |梯璅∪
砍敺 IT_man 2015-7-2 19:36 蝺刻摩 ; W/ m, K3 ]+ u6 M4 b  b- O" X

% K& r$ l; h7 c: s& K- u1.剖偏//閬脣 slash詨/ [" x& Q6 Z  T# F9 _3 S! z  L% ]& y& x
2.喟潔
/ l2 r2 @8 A7 I3 i9 e7 A" W2 f; c3.雿輻典啗歲怠 敹雿輻 \^
3 {, K5 G% Z: Z! {, {. ppreg_match("/(甇閬璇隞嗅銝)/","(甈脤霅摮銝)")嚗憒甈脤霅摮銝脩泵甇閬璇隞嗅銝莎1(true)嚗銋0(false)error return false.3 g4 I- I2 W$ j5 d6 Z
銝憭批撖怎sensitive
. R! r) g9 x! i5 j& E. |6 b, U8 E6 ^5 yeregi('^hello', 'HELLO');
. f, m' M! |9 m7 G* H5 H% Kpreg_match('/^hello/i', 'HELLO');
/ g* ^/ e0 |7 y5 H. a3 P: q, O8 Y. c8 [0 K. [! u
$ H4 P  Q) F. a* K+ q+ m4 Y/ {4 ?
1. 閬頝唾怠寞蝚西; i3 o) ^5 d9 ?5 {6 S$ b* r' @
\   +   [   ]   .   ^   $   *   ?   (   )   |   '   "   {   }
, F' Z) [. _* c- w/ ]# U$ L. ^2 z憒雿輻典 甇閬銵券撘蝚西 隢雿輻刻歲怠 eg. \^( @6 e- `/ i' f3 h+ @9 H- B
6 S9 u6 `' i, |: d# u# E* J
1 r; O7 J4 m+ W8 j0 h: H; T- Q9 w
2.
  A+ J4 `7 M; @& T$ }
隤芣蝭靘
瘥撠銝蝡銋摮銝
/a/
怠瘥 a" 摮銝莎靘憒 ab", bac", cba"xyz"
/a./
怠瘥 a" 隞亙嗅隞颱摮摮銝莎靘憒 ab", bac"嚗亥瘥撠.嚗隢雿輻 \.嚗a", ba"
/^xy/
隞 xy" 憪摮銝莎靘憒 xyz", xyab"嚗亥瘥撠 ^嚗隢雿輻 \^嚗axy", bxy"
/xy$/
隞 xy" 蝯撠曄摮銝莎靘憒 axy", abxy"隞 xy" 蝯撠曄摮銝莎靘憒 axy", abxy" 嚗亥瘥撠 $嚗隢雿輻 \$嚗xya", xyb"
[13579]
1 3 5 7 9 摮銝莎靘憒嚗"a3b", 1xy"y2k"
[0-9]
急詨銋摮銝銝急詨銋摮銝
[a-z0-9]
急詨撠撖怠瘥銋摮銝銝急詨撠撖怠瘥銋摮銝
[a-zA-Z0-9]
急詨摮瘥銋摮銝銝急詨摮瘥銋摮銝
b[aeiou]t
bat", bet", bit", bot", but"bxt", bzt"
[^0-9]
銝急詨銋摮銝莎亥瘥撠 ^嚗隢雿輻 \^嚗急詨銋摮銝
[^aeiouAEIOU]
銝急喃摮銝莎亥瘥撠 ^嚗隢雿輻 \^嚗急喃摮銝
[^\^]
銝 ^" 銋摮銝莎靘憒 xyz", abc"xy^", a^bc"
隤芣
蝪∪桃靘
\
輸寞摮/A\*/ 舐冽潭撠 A*"嚗嗡葉 * 臭寞摮嚗粹輸嗥寞蝢抬隞亙銝 \"
^
瘥撠頛詨亙憪雿蝵/^A/ 舀撠 Abcd" 銝剔 A"嚗雿銝舀撠 aAb"
$
瘥撠頛詨亙蝯雿蝵/A$/ 舀撠 bcdA" 銝剔 A"嚗雿銝舀撠 aAb"
*
瘥撠銝摮嗆活游甈/bo*/ 舀撠 Good boook" 銝剔 booo"嚗鈭血舀撠 Good bk" 銝剔 b"
+
瘥撠銝摮銝甈⊥游甈∴蝑 {1,}/a+/ 舀撠 caaandy" 銝剔 aaa"嚗雿銝舀撠 cndy"
?
瘥撠銝摮嗆活銝甈/e?l/ 舀撠 angel" 銝剔 el"嚗銋臭誑瘥撠 angle" 銝剔 l"
.
瘥撠隞颱銝摮嚗雿銵蝚西銝蝞嚗/.n/ 舀撠 nay, an apple is on the tree" 銝剔 an" on"嚗雿銝舀撠 nay"
(x)
瘥撠 x 銝血蝚血典摮乩霈/(a*) and (b*)/ 舀撠 aaa and bb" 銝剔 aaa" bb"嚗銝血拙瘥撠敺啁摮銝脰身摰唾 RegExp.$1 RegExp.$2
xy
瘥撠 x y/a*b*/g 舀撠 aaa and bb" 銝剔 aaa" bb"
{n}
瘥撠銝摮 n 甈∴n 箔甇湔/a{3}/ 舀撠 lllaaalaa" 嗡葉 aaa"嚗雿銝舀撠 aa"
{n,}
瘥撠銝摮喳 n 甈∴n 箔甇湔/a{3,}/ 舀撠 aa aaa aaaa" 嗡葉 aaa" aaaa"嚗雿銝舀撠 aa"
{n,m}
瘥撠銝摮喳 n 甈∴喳 m 甈∴mn 箸迤湔/a{3,4}/ 舀撠 aa aaa aaaa aaaaa" 嗡葉 aaa" aaaa"嚗雿銝舀撠 aa" aaaaa"
[xyz]
瘥撠銝剜砍憫抒隞颱摮/[ecm]/ 舀撠 welcome" 銝剔 e" c" m"
[^xyz]
瘥撠銝其葉砍憫批箇曄隞颱摮/[^ecm]/ 舀撠 welcome" 銝剔 w""l""o"嚗航箏嗉 [xyz] 賜詨嚗隢摮訾瘜冽 /^/ [^] 銋賜銝嚗
[\b]
瘥撠雿摮嚗Backspace character嚗臭誑瘥撠銝 backspace 嚗銋隢瘜冽 [\b] \b 銋撌桀
\b
瘥撠望摮嚗靘憒蝛箸靘憒 /\bn\w/ 臭誑瘥撠 noonday" 銝剔 no ;2 z, n/ m& M( @6 y  W
/\wy\b/ 舀撠 possibly yesterday." 銝剔 ly
\B
瘥撠望摮靘憒, /\w\Bn/ 臭誑瘥撠 noonday" 銝剔 on ,
( M. M0 U6 `; o. ~. j0 U血 /y\B\w/ 臭誑瘥撠 possibly yesterday." 銝剔 ye
\cX
瘥撠批嗅嚗Control character嚗嚗嗡葉 X 臭批嗅/\cM/ 臭誑瘥撠銝摮銝脖葉 control-M
\d
瘥撠隞颱詨嚗蝑 [0-9]/[\d]/ 舀撠 0 9 隞颱詨雿園憒摮瘥蝑撠曹舀撠
\D
瘥撠隞颱詨嚗蝑 [^0-9]/[\D]/ 舀撠 w" a" 雿銝舀撠憒 7 1 蝑詨
\f
瘥撠 form-feed交臬冽摮銝剜潛 " 銵箏臭誑瘥撠
\n
瘥撠銵蝚西交臬冽摮銝剜潛 銵" 銵箏臭誑瘥撠
\r
瘥撠 carriage return
\s
瘥撠隞颱蝛箇賢嚗White space character嚗嚗蝑 [ \f\n\r\t\v]/\s\w*/ 舀撠 A b" 銝剔 b"
\S
瘥撠隞颱蝛箇賢嚗蝑 [^ \f\n\r\t\v]/\S/\w* 舀撠 A b" 銝剔 A"
\t
瘥撠摰雿摮嚗Tab嚗
\v
瘥撠游雿摮嚗Vertical tab嚗
\w
瘥撠詨摮瘥摮嚗Alphanumerical characters嚗摨蝺摮瘥嚗"_"嚗嚗蝑 [A-Za-z0-9_]/\w/ 舀撠 .A _!9 銝剔 A""_""9喋
\W
瘥撠詨摮瘥摮摨蝺摮瘥嚗蝑 [^A-Za-z0-9_]/\W/ 舀撠 .A _!9 銝剔 ."" "!"嚗航嗅質 /\w/ 啣末詨
\ooctal
瘥撠恍脖嚗嗡葉octal臬恍脖貊/\oocetal123/ 舀撠恍脖ASCII銝 123 詨摮潦
\xhex
瘥撠剝脖嚗嗡葉hex臬剝脖貊/\xhex38/ 舀撠 16脖ASCII銝 38 詨摮
3 `  O+ y' {) ?& c
靘:
) v: ^$ G9 @; R  m9 a+ U"http://videomega.tv/view.php?ref=057070073072049056055072068049049068072055056049072073070057&"   "057070073072049056055072068049049068072055056049072073070057"   銝脫詨 ====>
  1. $LINK_PAGE="http://videomega.tv/view.php?ref=057070073072049056055072068049049068072055056049072073070057&";
    - R& E  J  y8 G: h2 y& w% W" M
  2. preg_match('/http\:\/\/videomega\.tv\/view\.php\?ref=(\d+)&/i', $LINK_PAGE, $tmp_matches);
銴鋆賭誨蝣
! ?$ \% U. H9 a: l' W8 c- L
蝯 ===>
& i  F* V! U5 v+ ~$tmp_matches[0] = "http://videomega.tv/view.php?ref=057070073072049056055072068049049068072055056049072073070057&"
& ^, t( \1 u5 D- K0 Q. ~' E0 \$tmp_matches[1] = "057070073072049056055072068049049068072055056049072073070057"( u, w. a6 Z3 j/ b4 n- c+ H
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