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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
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9 K8 @" I1 M2 C4 B. J2.喟潔/ G0 M6 f+ l5 ^! w; J
3.雿輻典啗歲怠 敹雿輻 \^9 N! ^; z% y+ o0 J, i- h) i
preg_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.4 @# [8 P7 ~" s" H0 L, l
銝憭批撖怎sensitive
/ ~2 x2 l) ?& B8 j% qeregi('^hello', 'HELLO');1 x) v" y9 m& T8 z6 z8 X
preg_match('/^hello/i', 'HELLO');$ w; n9 B! i8 \* c6 U4 ?# h2 M6 W7 s
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1. 閬頝唾怠寞蝚西" X- R; D* I/ @  O0 K/ Y' {' {
\   +   [   ]   .   ^   $   *   ?   (   )   |   '   "   {   }4 B! D' E" m- B0 k3 v
憒雿輻典 甇閬銵券撘蝚西 隢雿輻刻歲怠 eg. \^
; f7 L5 V3 t" W) c5 n0 o* O$ Y% L& _' t: L5 }

1 d1 a4 d+ e) E. C5 K; O2.. a1 {3 c# Q0 f5 D
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 ;7 Y9 ?& b, }' E0 q! a% c7 n+ h( x
/\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 ,4 j1 {5 P8 T3 D8 ~8 \) F& P& e, T
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

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"http://videomega.tv/view.php?ref=057070073072049056055072068049049068072055056049072073070057&"   "057070073072049056055072068049049068072055056049072073070057"   銝脫詨 ====>
  1. $LINK_PAGE="http://videomega.tv/view.php?ref=057070073072049056055072068049049068072055056049072073070057&";
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  2. preg_match('/http\:\/\/videomega\.tv\/view\.php\?ref=(\d+)&/i', $LINK_PAGE, $tmp_matches);
銴鋆賭誨蝣
; W) [( w) `2 l2 F
蝯 ===>$ ^$ m% e0 }1 x4 J
$tmp_matches[0] = "http://videomega.tv/view.php?ref=057070073072049056055072068049049068072055056049072073070057&"8 @/ R8 w: d* l% y: {% c$ z+ n+ h/ y
$tmp_matches[1] = "057070073072049056055072068049049068072055056049072073070057"3 I; L& ~9 ~1 l# s0 J4 ~( d
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