{"id":759,"date":"2009-11-26T13:44:00","date_gmt":"2009-11-26T05:44:00","guid":{"rendered":""},"modified":"2013-11-26T14:11:48","modified_gmt":"2013-11-26T06:11:48","slug":"php%e5%88%a0%e9%99%a4%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0%e7%9a%84%e6%96%b9%e6%b3%95%e5%ae%9e%e4%be%8b","status":"publish","type":"post","link":"https:\/\/kyle.ai\/blog\/759.html","title":{"rendered":"PHP\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u5b9e\u4f8b"},"content":{"rendered":"<p>PHP\u4e2d\u7684\u6570\u7ec4\u8981\u6dfb\u52a0\u5143\u7d20\u975e\u5e38\u7b80\u5355,\u76f4\u63a5\u7528\u8d4b\u503c\u5c31\u884c\u4e86,\u6570\u7ec4\u7684key\u4f1a\u81ea\u52a8\u589e\u52a0,\u4f46\u662f\u8981\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u5462?\u4f60\u60f3\u8fc7\u5417?\u662f\u4e0d\u662f\u5f88\u5c11\u9047\u5230?\u6211\u8fd1\u65e5\u5728\u5904\u7406\u4e00\u4e2a\u8d2d\u7269\u7bee\u7a0b\u5e8f\u65f6\u9047\u5230\u4e86\u8981\u5220\u9664\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u95ee\u9898,\u5bfb\u627e\u4e86\u534a\u5929,\u7ec8\u4e8e\u627e\u5230\u4e86\u5220\u9664\u6570\u7ec4\u7684\u65b9\u6cd5,\u5176\u5b9e\u5f88\u7b80\u5355.<br \/>\n\u5f00\u59cb\u6211\u53c2\u7167\u4e00\u7bc7\u6587\u7ae0\u300a\u5b57\u7b26\u4e32\u6570\u7ec4\uff0c\u5220\u9664\u6570\u7ec4\u5143\u7d20\u300b(OSO\u4e2d\u6709)\u4e2d\u7684\u65b9\u6cd5,\u7528unset,\u4f46\u662f\u6709\u4e2a\u7f3a\u9677.\u5982$a\u662f\u4e00\u4e2a\u6570\u7ec4:<\/p>\n<pre class=\"brush: php; title: ; notranslate\" title=\"\">\r\n&lt;? $a=array(&quot;red&quot;, &quot;green&quot;, &quot;blue&quot;, &quot;yellow&quot;);\r\ncount($a); \/\/\u5f97\u52304\r\nunset($a&#x5B;1]); \/\/\u5220\u9664\u7b2c\u4e8c\u4e2a\u5143\u7d20\r\ncount($a); \/\/\u5f97\u52303\r\necho $a&#x5B;2]; \/\/\u6570\u7ec4\u4e2d\u4ec5\u6709\u4e09\u4e2a\u5143\u7d20,\u672c\u60f3\u5f97\u5230\u6700\u540e\u4e00\u4e2a\u5143\u7d20,\u4f46\u5374\u5f97\u5230blue,\r\necho $a&#x5B;1]; \/\/\u65e0\u503c\r\n?&gt;\r\n<\/pre>\n<p>\u4e5f\u5c31\u662f\u8bf4\u5728\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u540e,\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4e2a\u6570(\u7528count()\u5f97\u5230)\u53d8\u4e86,\u4f46\u6570\u7ec4\u4e0b\u6807\u5374\u6ca1\u6709\u91cd\u65b0\u6392\u5217,\u8fd8\u5fc5\u987b\u7528\u5220\u9664\u6570\u7ec4\u524d\u7684key\u6765\u64cd\u4f5c\u76f8\u5e94\u7684\u503c.<br \/>\n\u540e\u6765\u6211\u91c7\u7528\u53e6\u4e00\u79cd\u65b9\u6cd5,\u5176\u5b9e\u6839\u672c\u5c31\u4e0d\u53eb&#8221;\u65b9\u6cd5&#8221;,\u662f\u7528PHP4\u73b0\u6210\u7684\u51fd\u6570array_splice().<\/p>\n<pre class=\"brush: php; title: ; notranslate\" title=\"\">\r\n&lt;? $a=array(&quot;red&quot;, &quot;green&quot;, &quot;blue&quot;, &quot;yellow&quot;);\r\ncount ($a); \/\/\u5f97\u52304\r\narray_splice($a,1,1); \/\/\u5220\u9664\u7b2c\u4e8c\u4e2a\u5143\u7d20\r\ncount ($a); \/\/\u5f97\u52303\r\necho $a&#x5B;2]; \/\/\u5f97\u5230yellow\r\necho $a&#x5B;1]; \/\/\u5f97\u5230blue\r\n?&gt;\r\n<\/pre>\n<p>\u628a\u8fd9\u4e2a\u7a0b\u5e8f\u548c\u524d\u4e00\u4e2a\u76f8\u5bf9\u6bd4,\u5c31\u53ef\u4ee5\u770b\u5230,array_splice()\u4e0d\u4ec5\u5220\u9664\u4e86\u5143\u7d20,\u8fd8\u628a\u5143\u7d20\u91cd\u6392\u4e86,\u8fd9\u6837\u5728\u6570\u7ec4\u5404\u5143\u7d20\u4e2d\u95f4\u5c31\u4e0d\u4f1a\u6709\u7a7a\u503c(\u5982\u524d\u4f8b\u4e2d\u7684$a[1]).<\/p>\n<p>array_splice()\u5176\u5b9e\u662f\u66ff\u6362\u6570\u7ec4\u5143\u7d20\u7684\u51fd\u6570,\u4f46\u5982\u679c\u4e0d\u52a0\u66ff\u6362\u503c\u5c31\u7b80\u5355\u7684\u5220\u9664\u5143\u7d20.\u4e0b\u9762\u662farray_splice()\u7684\u7528\u6cd5:<br \/>\narray array_splice (array input, int offset [, int length [, array replacement]])<\/p>\n<p>\u53c2\u6570input\u662f\u8981\u64cd\u4f5c\u7684\u6570\u7ec4;offset\u662f\u4ece\u7b2c\u51e0\u4e2a\u5143\u7d20\u5f00\u59cb,\u4e3a\u6b63\u65f6\u4ece\u7b2c\u4e00\u4e2a\u5143\u7d20\u5f00\u59cb\u6570,\u4e3a\u8d1f\u65f6\u4ece\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u5f00\u59cb\u6570;length\u4e3a\u8981\u66ff\u6362\/\u5220\u9664\u5143\u7d20\u7684\u4e2a\u6570,\u7701\u7565\u65f6\u5c31\u4eceoffset\u5f00\u59cb\u5230\u6570\u7ec4\u7ed3\u675f,\u4e5f\u662f\u53ef\u6b63\u53ef\u8d1f,\u539f\u7406\u548coffset\u4e00\u6837;relacement\u4e3a\u8981\u66ff\u6362\u7684\u503c.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u4e2d\u7684\u6570\u7ec4\u8981\u6dfb\u52a0\u5143\u7d20\u975e\u5e38\u7b80\u5355,\u76f4\u63a5\u7528\u8d4b\u503c\u5c31\u884c\u4e86,\u6570\u7ec4\u7684key\u4f1a\u81ea\u52a8\u589e\u52a0,\u4f46\u662f\u8981\u5220\u9664\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u5462?\u4f60\u60f3\u8fc7\u5417 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-759","post","type-post","status-publish","format-standard","hentry","category-code_related"],"_links":{"self":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/759","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/comments?post=759"}],"version-history":[{"count":1,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/759\/revisions"}],"predecessor-version":[{"id":5248,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/759\/revisions\/5248"}],"wp:attachment":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/media?parent=759"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/categories?post=759"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/tags?post=759"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}