{"id":903,"date":"2024-06-05T20:35:05","date_gmt":"2024-06-05T12:35:05","guid":{"rendered":"https:\/\/cn.raksmart.com\/blog\/host\/4182.html"},"modified":"2024-06-05T20:35:05","modified_gmt":"2024-06-05T12:35:05","slug":"php%e7%ac%94%e8%ae%b0%ef%bc%9a%e7%b1%bb%e5%92%8c%e5%af%b9%e8%b1%a1%e4%b9%8b%e9%87%8d%e8%bd%bd%e5%92%8c%e9%ad%94%e6%9c%af%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/cn.raksmart.com\/blog\/knowledge\/jszc\/903.html","title":{"rendered":"PHP\u7b14\u8bb0\uff1a\u7c7b\u548c\u5bf9\u8c61\u4e4b\u91cd\u8f7d\u548c\u9b54\u672f\u65b9\u6cd5"},"content":{"rendered":"
\n

\u5728\u7c7b\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\u6211\u4eec\u79f0\u4e4b\u4e3a\u201c\u5c5e\u6027\uff08property\uff09\u201d\uff0c\u7531\u4e8e\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7ecf\u5e38\u4e0e\u6570\u636e\u5e93\u4e2d\u7684\u201c\u5b57\u6bb5\u201d\u4ea7\u751f\u4e00\u5b9a\u7684\u5173\u8054\uff0c\u4ea6\u53ef\u79f0\u4e4b\u4e3a\u201c\u5b57\u6bb5\u201d\u3002\u5c5e\u6027\u7684\u58f0\u660e\u5fc5\u987b\u7531\u8bbf\u95ee\u63a7\u5236\u5173\u952e\u5b57public\uff08\u516c\u5f00\u7684\uff09\u3001protected\uff08\u53d7\u4fdd\u62a4\u7684\uff09\u6216private\uff08\u79c1\u6709\u7684\uff09\u5f00\u5934\u3002\u672c\u6587Raksmart<\/a>\u7f8e\u56fd\u670d\u52a1\u5668<\/a><\/strong>\u4e3a\u4f60\u4ecb\u7ecdPHP\u7c7b\u548c\u5bf9\u8c61\u4e4b\u91cd\u8f7d\u548c\u9b54\u672f\u65b9\u6cd5<\/p>\n

class car {<\/p>\n

public $brand = \u2018Volkswagen\u2019;<\/p>\n

protected $price = 999999;<\/p>\n

private $color = \u2018red\u2019;<\/p>\n

function getBrand(){<\/p>\n

return $this->brand;<\/p>\n

}}<\/p>\n

public\u5c5e\u6027\u53ef\u4ee5\u5728\u7c7b\u7684\u5916\u90e8\u8bbf\u95ee\uff0c\u800cprotected\u548cprivate\u5c5e\u6027\u5219\u53ea\u80fd\u7531\u8be5\u7c7b\u5185\u90e8\u7684\u65b9\u6cd5\u4f7f\u7528\u3002\u5916\u90e8\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u65f6\uff0c\u4f7f\u7528 -> \u64cd\u4f5c\u7b26\u3002\u5185\u90e8\u8bbf\u95ee\u65f6\u4f7f\u7528$this\uff08\u4f2a\u53d8\u91cf\uff09\u8c03\u7528\u5f53\u524d\u5bf9\u8c61\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\u3002 \u66f4\u591a\u5185\u5bb9\u8bf7\u9605\u8bfb \uff1aPHP\u57fa\u7840\u5b66\u4e60\u4e4b\u6570\u7ec4\u4ecb\u7ecd<\/a><\/p>\n

\u4f8b\u5982\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n

$c = new car(); <\/p>\n

echo $c->brand; \/\/Volkswagen<\/p>\n

echo $c->price; \/\/\u62a5\u9519\uff0c\u53d7\u4fdd\u62a4\u5c5e\u6027\u4e0d\u5141\u8bb8\u5916\u90e8\u8bbf\u95ee<\/p>\n

echo $c->color; \/\/\u62a5\u9519\uff0c\u79c1\u6709\u5c5e\u6027\u4e0d\u5141\u8bb8\u5916\u90e8\u8bbf\u95ee<\/p>\n

\u7c7b\u4e2d\u7684\u65b9\u6cd5\uff08function\uff09\u548c\u5c5e\u6027\u5177\u6709\u4e00\u6837\u7684\u8bbf\u95ee\u63a7\u5236\u65b9\u5f0f\u3002\u5b9a\u4e49\u65b9\u6cd5\u65f6\u52a0\u4e0apublic\u3001protected\u548cprivate\u5173\u952e\u5b57\u5373\u53ef\u3002\u9ed8\u8ba4\u72b6\u6001\u4e0b\u4e3apublic\u3002\u540c\u6837\u7684\uff0cpublic\u53ef\u901a\u8fc7->\u64cd\u4f5c\u7b26\u5916\u90e8\u8bbf\u95ee\uff0c\u800cprotected\u548cprivate\u65b9\u6cd5\u53ea\u80fd\u901a\u8fc7\u4e3a\u53d8\u91cf$this\u5185\u90e8\u8bbf\u95ee\u3002<\/p>\n

protected\u548cprivate\u90fd\u4e0d\u53ef\u5916\u90e8\u8bbf\u95ee\uff0c\u533a\u522b\u5728\u54ea\u91cc\u5462\uff1f<\/p>\n

\u4ece\u5b57\u9762\u7406\u89e3\uff0cprotected\u53ea\u662f\u53d7\u4fdd\u62a4\u800c\u5df2\uff0c\u6240\u6709\u53ef\u4ee5\u5728\u672c\u7c7b\u3001\u7236\u7c7b\u548c\u5b50\u7c7b\u4e2d\u8bbf\u95ee\u3002\u800cprivate\u53ea\u80fd\u5728\u672c\u7c7b\u4e2d\u8bbf\u95ee\u3002<\/p>\n

\u9759\u6001\u5c5e\u6027\uff1astatic property<\/p>\n

\u4f7f\u7528\u5173\u952e\u5b57static\u4fee\u9970\u7684\u5c5e\u6027\u79f0\u4e4b\u4e3a\u9759\u6001\u5c5e\u6027\uff0c\u76f8\u5bf9\u5730\uff0c\u672a\u88abstatic\u4fee\u9970\u7684\u5c5e\u6027\u79f0\u4e4b\u4e3a\u666e\u901a\u5c5e\u6027\u3002\u9759\u6001\u5c5e\u6027\u4e4b\u6240\u4ee5\u4e3a\u9759\u6001\u662f\u5e94\u4e3a\u5176\u53ea\u5c5e\u4e8e\u7c7b\u672c\u8eab\uff0c\u4e0d\u4f1a\u968f\u7740\u7c7b\u7684\u5b9e\u4f8b\u5316\u800c\u88ab\u590d\u5236\u5230\u5bf9\u8c61\uff0c\u6240\u4ee5\u4e5f\u4e0d\u80fd\u901a\u8fc7->\u8bbf\u95ee\u3002\u4f8b\u5982\uff1a<\/p>\n

class car {<\/p>\n

public $brand = \u201d;<\/p>\n

static $num = 0;<\/p>\n

}<\/p>\n

$c1 = new car;<\/p>\n

$c1->brand = \u2018Toyota\u2019;<\/p>\n

\/\/$c1->num++;\u00a0 \/\/\u62a5\u9519\uff0c\u9759\u6001\u53d8\u91cf\u4e0d\u5141\u8bb8->\u8bbf\u95ee\u3002<\/p>\n

car::$num++;\u00a0 \/\/0+1<\/p>\n

echo car::$num;\u00a0 \/\/ \u8fd4\u56de 1<\/p>\n

$c2 = new car;<\/p>\n

$c2->brand = \u2018Honda\u2019;<\/p>\n

car::$num++;\u00a0 \/\/ 1+1<\/p>\n

echo car::$num; \/\/\u8fd4\u56de2<\/p>\n

\u4ece\u4ee5\u4e0a\u4f8b\u5b50\u53ef\u4ee5\u770b\u51fa\uff0cbrand\u5c5e\u6027\u4f1a\u968f\u7740new\u64cd\u4f5c\u800c\u201c\u590d\u5236\u201d\u5230\u5bf9\u8c61\uff0c\u6bcf\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u5c31\u4f1a\u6709\u4e00\u4e2abrand\uff0c\u800c\u9759\u6001\u5c5e\u6027num\u4e0d\u4f1a\u3002\u8bbf\u95ee\u9759\u6001\u5c5e\u6027\u65f6\uff0c$\u7b26\u53f7\u4e0d\u53ef\u9057\u6f0f\u3002\u63a8\u8350\u9605\u8bfb\uff1a\u5982\u4f55\u5bfc\u5165\u548c\u5bfc\u51faMYSQL\u6570\u636e\u5e93<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728\u7c7b\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\u6211\u4eec\u79f0\u4e4b\u4e3a\u201c\u5c5e\u6027\uff08property\uff09\u201d\uff0c\u7531\u4e8e\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7ecf\u5e38\u4e0e\u6570\u636e\u5e93\u4e2d\u7684\u201c\u5b57\u6bb5\u201d\u4ea7\u751f\u2026 <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[644],"class_list":["post-903","post","type-post","status-publish","format-standard","hentry","category-jszc","tag-php"],"_links":{"self":[{"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/posts\/903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/comments?post=903"}],"version-history":[{"count":0,"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/posts\/903\/revisions"}],"wp:attachment":[{"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/media?parent=903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/categories?post=903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.raksmart.com\/blog\/wp-json\/wp\/v2\/tags?post=903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}