{"id":852,"date":"2012-08-27T09:18:45","date_gmt":"2012-08-27T01:18:45","guid":{"rendered":"http:\/\/www.poloo.org\/?p=852"},"modified":"2012-08-27T09:18:45","modified_gmt":"2012-08-27T01:18:45","slug":"php%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e6%9b%bf%e6%8d%a2%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/www.poloo.org\/?p=852","title":{"rendered":"PHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u5b9e\u73b0"},"content":{"rendered":"<p>PHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u5b9e\u73b0\u662f\u5982\u4f55\u7684\u5462\uff1f\u9996\u5148\u5411\u4f60\u4ecb\u7ecd\u4e0bPHP preg_replace\uff0cPHP preg_replace\u7684\u4f7f\u7528\u662f\u6211\u4eec\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c\u90a3\u4e48\u5bf9\u4e8ePHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u5b9e\u73b0\u8fc7\u7a0b\u6211\u4eec\u4ece\u5b9e\u4f8b\u5165\u624b\u3002<br \/>\nPHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u7684\u76f8\u5173\u6982\u5ff5\uff1a<br \/>\npreg_replace\uff1a\u6267\u884c\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u641c\u7d22\u548c\u66ff\u6362<br \/>\nmixed preg_replace (<br \/>\nmixed pattern,<br \/>\nmixed replacement,<br \/>\nmixed subject [, int limit])<br \/>\npreg_replace\uff1a\u5141\u8bb8\u4f60\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u5339\u914d\u5230\u4f60\u5b9a\u4e49\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\u4e00\u4e2a\u7b80\u5355\u7684\u6ce8\u91ca\u79fb\u9664\u529f\u80fd\uff1a<br \/>\npreg_replace(&#8216;[(\/*)+.+(*\/)]&#8217;, &#8221;, $val);<\/p>\n<p><!--more--><\/p>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u53ef\u4ee5\u79fb\u9664\u5728 PHP \u548c CSS \u4e2d\u4f7f\u7528 \/* \u6ce8\u91ca *\/ \u683c\u5f0f\u7684\u591a\u591a\u884c\u6ce8\u91ca\u3002\u5176\u4e2d\u7684\u4e09\u4e2a\u53c2\u6570\u5206\u522b\u4e3a\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u8981\u66ff\u6362\u6210\u7684\u5b57\u7b26\u4e32\u548c\u8981\u66ff\u6362\u7684\u76ee\u6807\u5b57\u7b26\u4e32\uff08\u8fd9\u91cc\u8981\u505a\u79fb\u9664\u529f\u80fd\uff0c\u6240\u4ee5\u662f\u4e2a\u7a7a\u767d\u5b57\u7b26\u4e32 -&gt; &#8221;\uff09\u3002\u5982\u679c\u4f60\u60f3\u5339\u914d\u6b21\u7ea7\u89c4\u5219\uff0c\u53ef\u4ee5\u4f7f\u7528 $0 \u4ee3\u8868\u5168\u90e8\u5339\u914d\uff0c$1\u3001$2 \u7b49\uff0c\u4ee5\u6b64\u7c7b\u63a8\u4ee3\u8868\u5206\u522b\u7684\u6b21\u7ea7\u89c4\u5219\u3002<br \/>\n\u5728 subject \u4e2d\u641c\u7d22 pattern \u6a21\u5f0f\u7684\u5339\u914d\u9879\u5e76\u66ff\u6362\u4e3a replacement\u3002\u5982\u679c\u6307\u5b9a\u4e86 limit\uff0c\u5219\u4ec5\u66ff\u6362 limit \u4e2a\u5339\u914d\uff0c\u5982\u679c\u7701\u7565 limit \u6216\u8005\u5176\u503c\u4e3a -1\uff0c\u5219\u6240\u6709\u7684\u5339\u914d\u9879\u90fd\u4f1a\u88ab\u66ff\u6362\u3002<br \/>\nreplacement \u53ef\u4ee5\u5305\u542b \/\/n \u5f62\u5f0f\u6216\uff08\u81ea PHP 4.0.4 \u8d77\uff09$n \u5f62\u5f0f\u7684\u9006\u5411\u5f15\u7528\uff0c\u9996\u9009\u4f7f\u7528\u540e\u8005\u3002\u6bcf\u4e2a\u6b64\u79cd\u5f15\u7528\u5c06\u88ab\u66ff\u6362\u4e3a\u4e0e\u7b2c n \u4e2a\u88ab\u6355\u83b7\u7684\u62ec\u53f7\u5185\u7684\u5b50\u6a21\u5f0f\u6240\u5339\u914d\u7684\u6587\u672c\u3002n \u53ef\u4ee5\u4ece 0 \u5230 99\uff0c\u5176\u4e2d \/\/0 \u6216 $0 \u6307\u7684\u662f\u88ab\u6574\u4e2a\u6a21\u5f0f\u6240\u5339\u914d\u7684\u6587\u672c\u3002\u5bf9\u5de6\u5706\u62ec\u53f7\u4ece\u5de6\u5230\u53f3\u8ba1\u6570\uff08\u4ece 1 \u5f00\u59cb\uff09\u4ee5\u53d6\u5f97\u5b50\u6a21\u5f0f\u7684\u6570\u76ee\u3002<br \/>\n\u5bf9\u66ff\u6362\u6a21\u5f0f\u5728\u4e00\u4e2a\u9006\u5411\u5f15\u7528\u540e\u9762\u7d27\u63a5\u7740\u4e00\u4e2a\u6570\u5b57\u65f6\uff08\u5373\uff1a\u7d27\u63a5\u5728\u4e00\u4e2a\u5339\u914d\u7684\u6a21\u5f0f\u540e\u9762\u7684\u6570\u5b57\uff09\uff0c\u4e0d\u80fd\u4f7f\u7528\u719f\u6089\u7684 \/\/1 \u7b26\u53f7\u6765\u8868\u793a\u9006\u5411\u5f15\u7528\u3002\u4e3e\u4f8b\u8bf4 \/\/11\uff0c\u5c06\u4f1a\u4f7f preg_replace() \u641e\u4e0d\u6e05\u695a\u662f\u60f3\u8981\u4e00\u4e2a \/\/1 \u7684\u9006\u5411\u5f15\u7528\u540e\u9762\u8ddf\u7740\u4e00\u4e2a\u6570\u5b57 1 \u8fd8\u662f\u4e00\u4e2a \/\/11 \u7684\u9006\u5411\u5f15\u7528\u3002\u672c\u4f8b\u4e2d\u7684\u89e3\u51b3\u65b9\u6cd5\u662f\u4f7f\u7528 \/${1}1\u3002\u8fd9\u4f1a\u5f62\u6210\u4e00\u4e2a\u9694\u79bb\u7684 $1 \u9006\u5411\u5f15\u7528\uff0c\u800c\u4f7f\u53e6\u4e00\u4e2a 1 \u53ea\u662f\u5355\u7eaf\u7684\u6587\u5b57\u3002<br \/>\nPHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u7684\u76f8\u5173\u5b9e\u4f8b\uff1a<br \/>\n\u4f8b\u5b50 1. \u9006\u5411\u5f15\u7528\u540e\u9762\u7d27\u63a5\u7740\u6570\u5b57\u7684\u7528\u6cd5<br \/>\n<!--?php   $string = \"April 15, 2003\";   $pattern = \"\/(\/w+) (\/d+), (\/d+)\/i\";   $replacement = \"\/${1}1,\/$3\";   print preg_replace($pattern, $replacement, $string);     \/* Output      ======   April1,2003   *\/  ?--><br \/>\n\u5982\u679c\u641c\u7d22\u5230\u5339\u914d\u9879\uff0c\u5219\u4f1a\u8fd4\u56de\u88ab\u66ff\u6362\u540e\u7684 subject\uff0c\u5426\u5219\u8fd4\u56de\u539f\u6765\u4e0d\u53d8\u7684 subject\u3002<br \/>\npreg_replace() \u7684\u6bcf\u4e2a\u53c2\u6570\uff08\u9664\u4e86 limit\uff09\u90fd\u53ef\u4ee5\u662f\u4e00\u4e2a\u6570\u7ec4\u3002\u5982\u679c pattern \u548c replacement \u90fd\u662f\u6570\u7ec4\uff0c\u5c06\u4ee5\u5176\u952e\u540d\u5728\u6570\u7ec4\u4e2d\u51fa\u73b0\u7684\u987a\u5e8f\u6765\u8fdb\u884c\u5904\u7406\u3002\u8fd9\u4e0d\u4e00\u5b9a\u548c\u7d22\u5f15\u7684\u6570\u5b57\u987a\u5e8f\u76f8\u540c\u3002\u5982\u679c\u4f7f\u7528\u7d22\u5f15\u6765\u6807\u8bc6\u54ea\u4e2a pattern \u5c06\u88ab\u54ea\u4e2a replacement \u6765\u66ff\u6362\uff0c\u5e94\u8be5\u5728\u8c03\u7528 preg_replace() \u4e4b\u524d\u7528 ksort() \u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002<br \/>\n\u4f8b\u5b50 2. \u5728 preg_replace() \u4e2d\u4f7f\u7528\u7d22\u5f15\u6570\u7ec4<br \/>\n<!--?php   $string =    \"The quick brown fox jumped over the lazy dog.\";     $patterns[0] = \"\/quick\/\";   $patterns[1] = \"\/brown\/\";   $patterns[2] = \"\/fox\/\";     $replacements[2] = \"bear\";   $replacements[1] = \"black\";   $replacements[0] = \"slow\";     print preg_replace($patterns, $replacements, $string);     \/* Output      ======     The bear black slow jumped over the lazy dog.     *\/    \/* By ksorting patterns and replacements,      we should get what we wanted. *\/    ksort($patterns);   ksort($replacements);     print preg_replace($patterns, $replacements, $string);     \/* Output      ======   The slow black bear jumped over the lazy dog.   *\/  ?--><br \/>\n\u5982\u679c subject \u662f\u4e2a\u6570\u7ec4\uff0c\u5219\u4f1a\u5bf9 subject \u4e2d\u7684\u6bcf\u4e2a\u9879\u76ee\u6267\u884c\u641c\u7d22\u548c\u66ff\u6362\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u6570\u7ec4\u3002<br \/>\n\u5982\u679c pattern \u548c replacement \u90fd\u662f\u6570\u7ec4\uff0c\u5219 preg_replace() \u4f1a\u4f9d\u6b21\u4ece\u4e2d\u5206\u522b\u53d6\u51fa\u503c\u6765\u5bf9 subject \u8fdb\u884c\u641c\u7d22\u548c\u66ff\u6362\u3002\u5982\u679c replacement \u4e2d\u7684\u503c\u6bd4 pattern \u4e2d\u7684\u5c11\uff0c\u5219\u7528\u7a7a\u5b57\u7b26\u4e32\u4f5c\u4e3a\u4f59\u4e0b\u7684\u66ff\u6362\u503c\u3002\u5982\u679c pattern \u662f\u6570\u7ec4\u800c replacement \u662f\u5b57\u7b26\u4e32\uff0c\u5219\u5bf9 pattern \u4e2d\u7684\u6bcf\u4e2a\u503c\u90fd\u7528\u6b64\u5b57\u7b26\u4e32\u4f5c\u4e3a\u66ff\u6362\u503c\u3002\u53cd\u8fc7\u6765\u5219\u6ca1\u6709\u610f\u4e49\u4e86\u3002<br \/>\n\/e \u4fee\u6b63\u7b26\u4f7f preg_replace() \u5c06 replacement \u53c2\u6570\u5f53\u4f5c PHP \u4ee3\u7801\uff08\u5728\u9002\u5f53\u7684\u9006\u5411\u5f15\u7528\u66ff\u6362\u5b8c\u4e4b\u540e\uff09\u3002\u63d0\u793a\uff1a\u8981\u786e\u4fdd replacement \u6784\u6210\u4e00\u4e2a\u5408\u6cd5\u7684 PHP \u4ee3\u7801\u5b57\u7b26\u4e32\uff0c\u5426\u5219 PHP \u4f1a\u5728\u62a5\u544a\u5728\u5305\u542b preg_replace() \u7684\u884c\u4e2d\u51fa\u73b0\u8bed\u6cd5\u89e3\u6790\u9519\u8bef\u3002<br \/>\n\u4f8b\u5b50 3. \u66ff\u6362\u6570\u4e2a\u503c<br \/>\n<!--?php   $patterns = array    (\"\/(19|20)(\/d{2})-(\/d{1,2})-(\/d{1,2})\/\",                      \"\/^\/s*{(\/w+)}\/s*=\/\");   $replace = array    (\"\/\/3\/\/\/4\/\/\/1\/\/2\", \"$\/\/1 =\");   print preg_replace    ($patterns, $replace, \"{startDate} = 1999-5-27\");   ?--><br \/>\n\u672c\u4f8b\u5c06\u8f93\u51fa\uff1a<br \/>\n$startDate = 5\/27\/1999<br \/>\n\u4f8b\u5b50 4. \u4f7f\u7528 \/e \u4fee\u6b63\u7b26<br \/>\n<!--?php <br ?--> preg_replace<br \/>\n(&#8220;\/(]*&gt;)\/e&#8221;,<br \/>\n&#8220;&#8216;\/\/1&#8217;.strtoupper(&#8216;\/\/2&#8217;).&#8217;\/\/3&#8242;&#8221;,<br \/>\n$html_body);<br \/>\n?&gt;<br \/>\n\u8fd9\u5c06\u4f7f\u8f93\u5165\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709 HTML \u6807\u8bb0\u53d8\u6210\u5927\u5199\uff0c\u4ee5\u4e0a\u7684\u5b9e\u4f8b\u8fd0\u884c\u652f\u6301\u7248\u672c\u4e3aPHP 3&gt;= 3.0.9, PHP 4\u3002<br \/>\nPHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u7684\u76f8\u5173\u5185\u5bb9\u5c31\u5411\u4f60\u4ecb\u7ecd\u5230\u8fd9\u91cc\uff0c\u5e0c\u671b\u90a3\u4e2a\u5bf9\u4f60\u4e86\u89e3\u548c\u638c\u63e1PHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u6709\u6240\u5e2e\u52a9\u3002<br \/>\n\u8fa8\u6790PHP\u4e2dEreg\u6b63\u5219\u8868\u8fbe\u5f0f<br \/>\n\u6d45\u6790PHP\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u7684\u5b9e\u73b0<br \/>\nPHP\u6b63\u5219\u8868\u8fbe\u5f0f\u5b57\u7b26\u96c6\u7684\u4f7f\u7528\u6d45\u6790<br \/>\n\u6d45\u6790PHP\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u7684\u7279\u5b9a\u5b9e\u73b0<br \/>\nPHP preg_match\u6b63\u5219\u8868\u8fbe\u5f0f\u8be6\u89e3<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u6b63\u5219\u8868\u8fbe\u5f0f\u66ff\u6362\u5b9e\u73b0\u662f\u5982\u4f55\u7684\u5462\uff1f\u9996\u5148\u5411\u4f60\u4ecb\u7ecd\u4e0bPHP preg_&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,18],"tags":[36,113,109,112],"class_list":["post-852","post","type-post","status-publish","format-standard","hentry","category-Note","category-Php","tag-php-2","tag-113","tag-109","tag-112"],"_links":{"self":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/posts\/852","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=852"}],"version-history":[{"count":1,"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions"}],"predecessor-version":[{"id":853,"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions\/853"}],"wp:attachment":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}