{"id":31,"date":"2016-11-04T09:24:04","date_gmt":"2016-11-04T01:24:04","guid":{"rendered":"http:\/\/bolg.fengyuwuzu.cn.com\/?p=31"},"modified":"2016-11-04T09:24:04","modified_gmt":"2016-11-04T01:24:04","slug":"php-%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f-%e4%b8%aa%e4%ba%ba%e7%ac%94%e8%ae%b0%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"https:\/\/fengyuwuzu.cn\/?p=31","title":{"rendered":"PHP \u6b63\u5219\u8868\u8fbe\u5f0f \u4e2a\u4eba\u7b14\u8bb0\u603b\u7ed3"},"content":{"rendered":"

\u5f00\u5934\u7684 ^ \u548c\u7ed3\u5c3e\u7684 $ \u8ba9PHP\u4ece\u5b57\u7b26\u4e32\u5f00\u5934\u68c0\u67e5\u5230\u7ed3\u5c3e\u3002\u5047\u4f7f\u6ca1\u6709 $\uff0c\u7a0b\u5e8f\u4ecd\u4f1a\u5339\u914d\u5230 Email \u7684\u672b\u5c3e\u3002<\/p>\n

[\u00a0\u548c\u00a0]\u00a0\u88ab\u7528\u6765\u9650\u5236\u8bb8\u53ef\u8f93\u5165\u7c7b\u578b\u3002\u4f8b\u5982 a-z \u5141\u8bb8\u6240\u6709\u7684\u5c0f\u5199\u5b57\u6bcd\uff0cA-Z \u5141\u8bb8\u6240\u6709\u7684\u5927\u5199\u5b57\u6bcd\uff0c0-9 \u6240\u6709\u6570\u5b57\uff0c\u7b49\u7b49\uff0c\u4ee5\u53ca\u66f4\u591a\u5176\u4ed6\u7c7b\u578b\u3002<\/p>\n

{\u00a0\u548c\u00a0}\u00a0\u88ab\u7528\u6765\u9650\u5236\u671f\u671b\u7684\u5b57\u7b26\u6570\u3002\u4f8b\u5982 {2,4} \u8868\u793a\u5b57\u7b26\u4e32\u7684\u6bcf\u4e00\u8282\u53ef\u4ee5\u6709 2-4 \u5b57\u7b26\u957f\u5ea6\uff0c\u50cf\u662f .com.cn \u6216 .info\u3002\u5728\u8fd9\u91cc, \".\" \u5e76\u4e0d\u7b97\u4e00\u4e2a\u5b57\u7b26\uff0c\u56e0\u4e3a {2,4} \u4e4b\u524d\u5b9a\u4e49\u7684\u8bb8\u53ef\u8f93\u5165\u7c7b\u578b\u53ea\u6709\u5927\u5c0f\u5199\u5b57\u6bcd\uff0c\u6545\u6b64\u6bb5\u53ea\u5339\u914d\u5927\u5c0f\u5199\u5b57\u6bcd<\/p>\n

(\u00a0\u548c\u00a0)\u00a0\u88ab\u7528\u6765\u5408\u5e76\u5c0f\u8282\uff0c\u5e76\u5b9a\u4e49\u5b57\u7b26\u4e32\u4e2d\u5fc5\u987b\u5b58\u5728\u7684\u5b57\u7b26\u3002(a|b|c) \u80fd\u591f\u5339\u914d a \u6216 b \u6216 c\u3002<\/p>\n

(.) \u5c06\u5339\u914d\u6240\u6709\u5b57\u7b26\uff0c\u800c [.] \u53ea\u5339\u914d \".\" \u672c\u8eab\u3002<\/p>\n

\u8981\u4f7f\u7528\u4e00\u4e9b\u7b26\u53f7\u672c\u8eab\uff0c\u5fc5\u987b\u5728\u524d\u589e\u52a0\u4e00\u4e2a\\\u3002\u8fd9\u4e9b\u5b57\u7b26\u6709\uff1a( ) [ ] . * ? + ^ | $<\/p>\n

\u9644:PCRE \u8bed\u6cd5\u6307\u5357<\/h3>\n

\/\u00a0\u5b9a\u754c\u7b26
\n^\u00a0\u5b57\u7b26\u4e32\u5934
\n$\u00a0\u5b57\u7b26\u4e32\u5c3e
\n[a-z]\u00a0\u6240\u6709\u5c0f\u5199\u5b57\u6bcd
\n[A-Z]\u00a0\u6240\u6709\u5927\u5199\u5b57\u6bcd
\n[0-9]\u00a0\u6240\u6709\u6570\u5b57
\n?\u00a0\u96f6\u6216\u4e00\u4e2a\u7d27\u63a5\u524d\u7684\u5b57\u7b26
\n*\u00a0\u96f6\u6216\u591a\u4e2a\u7d27\u63a5\u524d\u7684\u5b57\u7b26
\n+\u00a0\u4e00\u6216\u591a\u4e2a\u7d27\u63a5\u524d\u7684\u5b57\u7b26
\n{4}\u00a04\u4e2a\u7d27\u63a5\u524d\u7684\u5b57\u7b26
\n{4,8}\u00a04-8\u4e2a\u7d27\u63a5\u524d\u7684\u5b57\u7b26
\n.\u00a0\u4efb\u610f\u5b57\u7b26
\n(red|green|blue)\u00a0Red \u6216 green \u6216 blue\uff08\u7ea2 \u6216 \u7eff \u6216 \u84dd\uff09
\ns\u00a0\u7a7a\u683c<\/p>\n

\u7279\u6b8a\u5b57\u7b26\uff08\u9700\u8981\u5728\u524d\u52a0\\\uff09
\n( ) [ ] . * ? + ^ | $<\/p>\n

\u89c4\u5219\u5339\u914d preg_match<\/h3>\n

\u5229\u7528 preg_match()\uff0c\u6211\u4eec\u53ef\u4ee5\u5b8c\u6210\u5b57\u7b26\u4e32\u7684\u89c4\u5219\u5339\u914d\u3002\u5982\u679c\u627e\u5230\u4e00\u4e2a\u5339\u914d\uff0cpreg_match() \u51fd\u6570\u8fd4\u56de 1\uff0c\u5426\u5219\u8fd4\u56de 0\u3002\u8fd8\u6709\u4e00\u4e2a\u53ef\u9009\u7684\u7b2c\u4e09\u53c2\u6570\u53ef\u4ee5\u8ba9\u4f60\u628a\u5339\u914d\u7684\u90e8\u5206\u5b58\u5728\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u5728\u9a8c\u8bc1\u6570\u636e\u65f6\u8fd9\u4e2a\u529f\u80fd\u53ef\u4ee5\u53d8\u5f97\u975e\u5e38\u6709\u7528\u3002<\/p>\n

$string = \"football\";
\nif (preg_match('\/foo\/', $string)) {
\n\/\/ \u5339\u914d\u6b63\u786e
\n}<\/p>\n

\u89c4\u5219\u66ff\u6362 preg_replace<\/h3>\n

preg_replace \u5141\u8bb8\u4f60\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u5339\u914d\u5230\u4f60\u5b9a\u4e49\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u3002
\n$val = \"\/*123456789*\/abcd\";
\n$pp = preg_replace(\"\/[(\\\/\\*)+(.)(\\*\\\/)+]+\/\",'fuck',$val);
\nprint_r($pp);
\n\u7ed3\u679c\u662f
\nfuck123456789fuckabcd<\/p>\n

\u89c4\u5219\u5206\u5272preg_split<\/h3>\n

preg_split \u53ef\u4ee5\u5c06\u6574\u6bb5\u5b57\u7b26\u4e32\u6309\u5339\u914d\u5230\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u5206\u5272\u6210 1\u30012\u6216\u66f4\u591a\u5b57\u7b26\u7684\u591a\u6bb5\u3002\u6bd4\u5982\u83b7\u53d6\u6807\u7b7e\uff0c\u65e0\u8bba\u662f\u7528\u7a7a\u683c\u8fd8\u662f\u9017\u53f7\u5206\u9694\u7684\uff1a<\/p>\n

$tags = preg_split('\/[,]\/', 'my,tags,unevenly,spaced');
\nprint_r($tags);
\n\u7ed3\u679c\u662f\uff1a
\nArray ( [0] => my [1] => tags [2] => unevenly [3] => spaced )<\/p><\/blockquote>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

\u5f00\u5934\u7684 ^ \u548c\u7ed3\u5c3e\u7684 $ \u8ba9PHP\u4ece\u5b57\u7b26\u4e32\u5f00\u5934\u68c0\u67e5\u5230\u7ed3\u5c3e\u3002\u5047\u4f7f\u6ca1\u6709 $\uff0c\u7a0b\u5e8f\u4ecd\u4f1a\u5339\u914d\u5230 Email \u7684\u672b\u5c3e\u3002 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[6],"class_list":["post-31","post","type-post","status-publish","format-standard","hentry","category-news","tag-php"],"yoast_head":"\nPHP \u6b63\u5219\u8868\u8fbe\u5f0f \u4e2a\u4eba\u7b14\u8bb0\u603b\u7ed3 | \u98ce\u96e8\u65e0\u963bblog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fengyuwuzu.cn\/?p=31\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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