{"id":84424,"date":"2020-05-14T23:20:02","date_gmt":"2020-05-14T15:20:02","guid":{"rendered":"http:\/\/4563.org\/?p=84424"},"modified":"2020-05-14T23:20:02","modified_gmt":"2020-05-14T15:20:02","slug":"php-%e7%bb%a7%e6%89%bf%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=84424","title":{"rendered":"PHP \u7ee7\u627f\u95ee\u9898"},"content":{"rendered":"
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PHP \u7ee7\u627f\u95ee\u9898 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

class a{ private $ff;<\/p>\n

public function cc(){<\/p>\n

$this->ff=44;<\/p>\n

echo $this->ff;<\/p>\n

var_dump($this); }<\/p>\n

}<\/p>\n

class b extends a{<\/p>\n

public function bb(){<\/p>\n

parent::cc();<\/p>\n

}<\/p>\n

}<\/p>\n

$dd = new b(); $dd->bb(); \u6211\u60f3\u77e5\u9053$this->ff=44;\u8fd9\u53e5\u4ee3\u7801\u6267\u884c\u7684\u65f6\u5019\u5230\u5e95\u662f\u5728\u7236\u7c7b\u6267\u884c\u7684\u8fd8\u662f\u5728\u5b50\u7c7b\u6267\u884c\u7684\u554a\uff0c\u8981\u662f\u5728\u7236\u7c7b\uff0c\u8fd4\u56de\u7684\u5bf9\u8c61\u4e3a\u4ec0\u4e48\u53c8\u662f\u5b50\u7c7b\u7684\u5bf9\u8c61,\u5e94\u8be5\u600e\u4e48\u7406\u89e3<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (18<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zsdroid <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5b50\u7c7b <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zsdroid <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    new \u5b50\u7c7b\uff0c\u8fd4\u56de\u5b50\u7c7b\u5bf9\u8c61\u6709\u95ee\u9898\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zsdroid <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zsdroid #1 \u5b50=\u300b\u7236 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e2a\u5730\u65b9\u597d\u7ed5\u554a\uff0c\u5728\u5b50\u7c7b\u6267\u884c\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c\u8fd8\u80fd\u770b\u5230\u7236\u7c7b\u7684\u79c1\u6709\u5c5e\u6027\u8fd8\u770b\u4e0d\u5230\u5b50\u7c7b\u7684\u79c1\u6709\u5c5e\u6027\uff0c\u5230\u5e95\u662f\u4ec0\u4e48\u8fd0\u884c\u673a\u5236\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ben1024 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sy5587
    \u7236\u7c7b\u7684\u65b9\u6cd5\u80fd\u8bbf\u95ee\u7236\u7c7b\u7684\u79c1\u6709\u5c5e\u6027\uff0c\u5b50\u7c7b\u7684\u65b9\u6cd5\u4e0d\u80fd\u8bbf\u95ee\uff0c\u56e0\u4e3a\u6ca1\u6709\u7ee7\u627f
    \u7c7b\u4f3c child class => child function => parent function => parent attribute <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : GM <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sy5587 \u4ee3\u7801\u662f\u5171\u4eab\u7684\uff0c\u53ea\u6709\u6210\u5458\u53d8\u91cf\u624d\u662f\u5404\u81ea\u72ec\u7acb\u7684\uff0c\u4f60\u8bf4\u7684\u90a3\u4e2a $this->ff = 44; \u8fd9\u53ea\u662f\u7ed9 a \u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u7684 ff \u53d8\u91cf\u8d4b\u503c\uff0c\u5e76\u4e0d\u662f\u8fd0\u884c\u4ec0\u4e48\u51fd\u6570\uff0c\u6240\u4ee5\u5e76\u4e0d\u5b58\u5728\u201c\u5728\u54ea\u91cc\u8fd0\u884c\u201d\u8fd9\u79cd\u95ee\u9898\u3002<\/p>\n

    \u81f3\u4e8e\u7c7b\u7684\u6210\u5458\u51fd\u6570\uff0c\u4f60\u53ef\u4ee5\u628a\u7c7b\u7684\u6210\u5458\u51fd\u6570\u6539\u5199\u6210\u8fd9\u6837\uff0c\u5c31\u5bb9\u6613\u7406\u89e3\u4e86\uff1a<\/p>\n

    ““
    public function cc ($this) { <— \u6ce8\u610f\u8fd9\u4e2a$this \u662f\u8c03\u7528 cc \u51fd\u6570\u7684\u65f6\u5019\u4f5c\u4e3a\u53c2\u6570\u4f20\u8fdb\u6765\u7684
    $this->ff = 44;
    echo $this->ff;
    var_dump($this);
    }
    ““ <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Wenco <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    parent::cc();
    \u4f60\u8fd9\u4ee3\u7801\u8fd0\u884c\u8d77\u6765\u6ca1\u95ee\u9898\u5417\uff1f\u975e\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u8fd9\u6837\u7528\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ben1024 =>\u662f\u8c03\u7528\u7684\u610f\u601d\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @GM \u4e0d\u597d\u610f\u601d\uff0c\u592a\u7b28\uff0c\u8fd8\u662f\u6709\u70b9\u6a21\u7cca\uff0c\u4f60\u7684\u610f\u601d\u662f\u4e0d\u662f\u628a\u4e24\u4e2a\u7c7b\u770b\u6210\u4e00\u4e2a\u7c7b <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @GM \u4f60\u5199\u7684\u90a3\u4e2a\u4ee3\u7801\u662f\u653e\u5728\u5b50\u7c7b\u91cc\u7684\u5417\uff0c$this \u662f\u8c03\u7528 cc \u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\uff0c\u662f\u628a\u5b50\u7c7b\u4f20\u8fdb\u53bb\uff1f\u6655\u4e86\u3002\u3002\u3002\u3002\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : GM <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Wenco \u53ef\u4ee5\u7684\uff0c\u5176\u5b9e\u5c31\u8ddf java \u91cc\u7684 super.cc() \u4e00\u6837\uff0c\u53ea\u8981 cc \u4e0d\u662f private\uff0c\u5b50\u7c7b\u5c31\u53ef\u4ee5\u8c03\u7528\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u65e2\u7136$this \u6307\u7684\u662f\u5b50\u7c7b\uff0c$this->ff \u4e0d\u662f\u5e94\u8be5\u662f\u5b50\u7c7b\u7684 ff \u5417\uff0c\u5b50\u7c7b\u6ca1\u6709 ff\uff0c\u7236\u7c7b\u6709\u4e2a ff \u5b50\u7c7b\u53c8\u65e0\u6cd5\u83b7\u53d6\uff0c\u90a3$this->ff \u7684\u65f6\u5019$this \u5230\u5e95\u662f\u7236\u7c7b\u8fd8\u662f\u5b50\u7c7b\uff0c\u96be\u9053\u662f\u52a8\u6001\u7684\u3001\u6211\u8981\u5d29\u6e83\u4e86\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @GM \u5927\u54e5\u6ca1\u5b66\u8fc7 java\uff0c\u521a\u5f00\u59cb\u5b66 php\uff0c\u5230\u8fd9\u91cc\u5361\u4f4f\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sy5587 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u65e2\u7136$this \u6307\u7684\u662f\u5b50\u7c7b\uff0c$this->ff \u4e0d\u662f\u5e94\u8be5\u662f\u5b50\u7c7b\u7684 ff \u5417\uff0c\u5b50\u7c7b\u6ca1\u6709 ff\uff0c\u7236\u7c7b\u6709\u4e2a ff \u5b50\u7c7b\u53c8\u65e0\u6cd5\u83b7\u53d6\uff0c\u90a3$this->ff=44 \u7684\u65f6\u5019$this \u5230\u5e95\u662f\u7236\u7c7b\u8fd8\u662f\u5b50\u7c7b\uff0c\u96be\u9053\u662f\u52a8\u6001\u7684\u3001\u6211\u8981\u5d29\u6e83\u4e86\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lxrmido <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    https:\/\/www.php.net\/manual\/zh\/language.oop5.visibility.php<\/p>\n

    ff \u662f private \u7684\uff0c\u53ea\u6709\u5728\u5b83\u81ea\u5df1\u7684\u4e0a\u4e0b\u6587\u91cc\u80fd\u88ab\u8bbf\u95ee <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : GM <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sy5587 \u5f00\u4e86\u4e2a\u65b0\u5e16\u56de\u7b54\u4f60\u95ee\u9898\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u5e2e\u52a9\u3002<\/p>\n

    https:\/\/www.v2ex.com\/t\/671509 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Bule <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u8fd8\u662f\u8d70\u5427 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : sayitagain <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    1.\u90fd\u662f public \u4f1a\u88ab\u7ee7\u627f\u548c\u590d\u5199
    2.\u90fd\u662f\u79c1\u6709\u4f1a\u51fa\u73b0\u4e24\u5c5e\u6027
    private ‘ff’ => string ‘bbb’
    private ‘ff’ (a) => string ‘aaa’
    3.\u79c1\u6709\u4e0d\u80fd\u88ab\u7ee7\u627f<\/p>\n

    \u5370\u8c61\u4e2d\u662f\u8fd9\u6837,\u4e0d\u8fc7\u6211\u4e0d\u592a\u5199\u7c7b <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n","protected":false},"excerpt":{"rendered":"

    PHP \u7ee7\u627f\u95ee\u9898 \u8cc7\u6df1\u5927\u4f6c : s…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/84424"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=84424"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/84424\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=84424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=84424"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=84424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}