{"id":1366,"date":"2024-03-08T12:16:52","date_gmt":"2024-03-08T04:16:52","guid":{"rendered":"https:\/\/log.tanxiaodian.com\/?p=1366"},"modified":"2024-03-08T12:18:09","modified_gmt":"2024-03-08T04:18:09","slug":"php%e7%b1%bb%e7%9a%84%e7%bb%a7%e6%89%bf%e4%b8%8e%e5%bb%b6%e8%bf%9f%e9%9d%99%e6%80%81%e7%bb%91%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/log.tanxiaodian.com\/?p=1366","title":{"rendered":"PHP\u7c7b\u7684\u7ee7\u627f\u4e0e\u5ef6\u8fdf\u9759\u6001\u7ed1\u5b9a"},"content":{"rendered":"\n

\u95ee\u9898\u7684\u63cf\u8ff0: <\/p>\n\n\n\n

\u7236\u7c7bA\u4e2d\u6709 <\/p>\n\n\n\n

\u9759\u6001\u5c5e\u6027 static $s_a = 1; <\/p>\n\n\n\n

\u9759\u6001\u65b9\u6cd5 static doshow() <\/p>\n\n\n\n

\u4e14\u5728\u6b64\u9759\u6001\u65b9\u6cd5\u4e2d\u53c8\u4f7f\u7528\u4e86\u9759\u6001\u5c5e\u6027$a (\u8c03\u7528\u65b9\u5f0f\u662f self::$a) \uff1b <\/p>\n\n\n\n

\u5b50\u7c7bB\u7ee7\u627fA ,\u56e0\u6b64B\u987a\u5176\u81ea\u7136\u7684\u7ee7\u627f\u4e86A\u7684\u9759\u6001\u5c5e\u6027\u548c\u9759\u6001\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u7c7bB \u5bf9staitc $a \u91cd\u65b0\u8fdb\u884c\u4e86\u5b9a\u4e49 static $a = 2 ; <\/p>\n\n\n\n

\u5f53\u4f7f\u7528B\u8c03\u7528doshow\u65b9\u6cd5\u65f6\u6211\u4eec\u53d1\u73b0\u4e86\u95ee\u9898: $a\u4ecd\u7136\u662fA\u4e2d\u5b9a\u4e49\u7684\u503c\u5e76\u6ca1\u6709\u4f7f\u7528B\u4e2d\u5b9a\u4e49\u7684$a<\/strong><\/p>\n\n\n\n

class A{\n   static $a = 1;\n   public static doshow(){\n      echo self::$a;\n   }\n}\nclass B extends A{\n   static $a = 2;\n}\n\nB::doshow(); \u6b64\u65f6\u4f1a\u8f93\u51fa 1\n\n\u5982\u679c\u9700\u8981\u8f93\u51faB\u4e2dstatic $a\u5b9a\u4e49\u7684\u503c \u5728doshow\u65b9\u6cd5\u4e2d\u5e94\u8be5\u4f7f\u7528 static \npublic static doshow()\n{\n    echo static::$a;\n}\n\u8fd9\u6837\u8c03\u7528B::doshow() \u5c31\u4f1a\u8f93\u51fa 2\n\n\u8fd9\u5c31\u662f\u5ef6\u8fdf\u9759\u6001\u7ed1\u5b9a\n\u5176\u539f\u56e0\u5c31\u662f: \u5982\u679c\u4f7f\u7528self  ,self\u4f1a\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u5176\u4f5c\u7528\u57df (\u5c06self\u66ff\u6362\u4e3a\u7c7b\u540dA)  \u56e0\u6b64\u5f53\u8c03\u7528\u65f6B:doshow()  \u8fd9\u4e2a\u65b9\u6cd5\u91cc\u9762\u7684\u4ee3\u7801\u662fA::$a  <\/code><\/pre>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u95ee\u9898\u7684\u63cf\u8ff0: \u7236\u7c7bA\u4e2d\u6709 \u9759\u6001\u5c5e\u6027 static …<\/p>\n
Continue readingPHP\u7c7b\u7684\u7ee7\u627f\u4e0e\u5ef6\u8fdf\u9759\u6001\u7ed1\u5b9a<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[250],"_links":{"self":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts\/1366"}],"collection":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1366"}],"version-history":[{"count":2,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts\/1366\/revisions"}],"predecessor-version":[{"id":1369,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=\/wp\/v2\/posts\/1366\/revisions\/1369"}],"wp:attachment":[{"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/log.tanxiaodian.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}