{"id":3932,"date":"2020-07-16T14:44:38","date_gmt":"2020-07-16T06:44:38","guid":{"rendered":"https:\/\/www.webteach.tw\/?p=3932"},"modified":"2020-07-16T14:44:38","modified_gmt":"2020-07-16T06:44:38","slug":"%e5%b8%b8%e9%87%8f-const","status":"publish","type":"post","link":"https:\/\/www.webteach.tw\/?p=3932","title":{"rendered":"[ PHP ] &#8211; OOP 10 \u5e38\u91cf const"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u63a5\u8457\u4ecb\u7d39\u4e00\u4e0b \u5e38\u91cf const \uff0c\u5b83\u7684\u7279\u8272\u662f \u53ef\u5b9a\u7fa9\u7684\u578b\u614bboolean\/integet\/float\/string \uff0c\u8207\u8b8a\u6578\u4e0d\u4e00\u6a23\u7684\u5730\u65b9\u662f\u524d\u9762\u4e0d\u7528\u52a0$\u5b57\u865f(\u5b83\u5c31\u4e0d\u662f\u8b8a\u6578 \u4e5f\u4e0d\u5141\u8a31\u8b8a\u66f4)\uff1b\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u8b80\u53d6\u4e0d\u7528\u7ba1\u4f5c\u7528\u57df\u3002<\/p>\n\n\n<pre class=\"wp-block-syntaxhighlighter-code\">\nclass computer {\n\tconst PI=3.14159;\/\/\u5713\u5468\u9577\u8207\u76f4\u5f91\u7684\u6bd4\u7387\n\t\/\/\u534a\u5f91\n\tprivate $radius;\n\tfunction set_radius($radius) { $this->radius = $radius;}\n\t\/\/\u5713\u5468\u9577\u516c\u5f0f \u76f4\u5f91\u4e58\u4ee5 PI\n\tfunction c_perimeter(){\n\t\treturn ($this->radius*2)*self::PI;\n\t}\n    \/\/\u5713\u9762\u7a4d\u516c\u5f0f \u534a\u5f91\u4e58\u4ee5\u534a\u5f91\u4e58\u4ee5 PI\n\tfunction c_area(){\n\t\treturn ($this->radius*$this->radius)*self::PI;\n\t}\n}\n$radius=$_GET['radius']??5;\/\/\u53ef\u4ee5\u5f9e\u7db2\u5740\u5e36\u5165\u534a\u5f91\u7684\u503c \u9810\u8a2d \u70ba 5\n$c = new computer();\necho '\u534a\u5f91\u70ba\uff1a'.$radius.'&lt;br>';\necho '\u76f4\u5f91\u70ba\uff1a'.($radius*2).'&lt;br>';\n$c->set_radius($radius);\/\/\u8a2d\u5b9a\u534a\u5f91\necho '\u5713\u5468\u9577\uff1a'.$c->c_perimeter().'&lt;br>';\/\/\u53d6\u5f97\u5713\u5468\u9577\necho '\u5713\u9762\u7a4d\uff1a'.$c->c_area().'&lt;br>';\/\/\u53d6\u5f97\u5713\u9762\u7a4d\n\/\/\u986f\u793a\u7d50\u679c\n\/*\n\u534a\u5f91\u70ba\uff1a5\n\u76f4\u5f91\u70ba\uff1a10\n\u5713\u5468\u9577\uff1a31.4159\n\u5713\u9762\u7a4d\uff1a78.53975\n*\/<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u63a5\u8457\u4ecb\u7d39\u4e00\u4e0b \u5e38\u91cf const \uff0c\u5b83\u7684\u7279\u8272\u662f \u53ef\u5b9a\u7fa9\u7684\u578b\u614bboolean\/integet\/float\/string \uff0c\u8207\u8b8a\u6578\u4e0d\u4e00\u6a23\u7684\u5730\u65b9\u662f\u524d\u9762\u4e0d\u7528\u52a0$\u5b57\u865f(\u5b83\u5c31\u4e0d\u662f\u8b8a\u6578 \u4e5f\u4e0d\u5141\u8a31\u8b8a\u66f4)\uff1b\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u8b80\u53d6\u4e0d\u7528\u7ba1\u4f5c\u7528\u57df\u3002<\/p>\n","protected":false},"author":1,"featured_media":2201,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,36],"tags":[178,429,448,832],"class_list":["post-3932","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oop","category-php","tag-const","tag-oop","tag-php","tag-832","hvn-theme-has-thumbnail"],"_links":{"self":[{"href":"https:\/\/www.webteach.tw\/index.php?rest_route=\/wp\/v2\/posts\/3932","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.webteach.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.webteach.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.webteach.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.webteach.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3932"}],"version-history":[{"count":0,"href":"https:\/\/www.webteach.tw\/index.php?rest_route=\/wp\/v2\/posts\/3932\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.webteach.tw\/index.php?rest_route=\/wp\/v2\/media\/2201"}],"wp:attachment":[{"href":"https:\/\/www.webteach.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.webteach.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.webteach.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}