{"id":3591,"date":"2016-07-01T11:30:52","date_gmt":"2016-07-01T03:30:52","guid":{"rendered":"http:\/\/www.wpadmin.cn\/blog\/?p=3591"},"modified":"2016-07-01T11:35:49","modified_gmt":"2016-07-01T03:35:49","slug":"php%e4%b8%adstatic%e9%9d%99%e6%80%81%e7%b1%bb%e4%b8%8estatic-%e9%9d%99%e6%80%81%e5%8f%98%e9%87%8f%e7%94%a8%e6%b3%95%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/www.wpadmin.cn\/blog\/3591.html","title":{"rendered":"php\u4e2dstatic\u9759\u6001\u7c7b\u4e0estatic \u9759\u6001\u53d8\u91cf\u7528\u6cd5\u533a\u522b"},"content":{"rendered":"
static \u662f\u5b9a\u4e49\u4e00\u4e2a\u9759\u6001\u5bf9\u8c61\u6216\u9759\u6001\u53d8\u91cf\uff0c\u5173\u4e8estatic \u5b9a\u4e49\u7684\u53d8\u91cf\u6216\u7c7b\u65b9\u6cd5\u6709\u4ec0\u4e48\u7279\u6027\u6211\u4eec\u770b\u5b8c\u672c\u6587\u7ae0\u7684\u76f8\u5173\u5b9e\u4f8b\u540e\u5c31\u89c1\u5206\u6653\u4e86\u3002<\/div>\n
<\/div>\n

1. \u521b\u5efa\u5bf9\u8c61$object = new Class()\uff0c\u7136\u540e\u4f7f\u7528\u201d->\u201d\u8c03\u7528\uff1a$object->attribute\/function\uff0c\u524d\u63d0\u662f\u8be5\u53d8\u91cf\/\u65b9\u6cd5\u53ef\u8bbf\u95ee\u3002
\n2. \u76f4\u63a5\u8c03\u7528\u7c7b\u65b9\u6cd5\/\u53d8\u91cf\uff1aclass::attribute\/function\uff0c\u65e0\u8bba\u662f\u9759\u6001\/\u975e\u9759\u6001\u90fd\u53ef\u4ee5\u3002\u4f46\u662f\u6709\u524d\u63d0\u6761\u4ef6\uff1a
\nA. \u5982\u679c\u662f\u53d8\u91cf\uff0c\u9700\u8981\u8be5\u53d8\u91cf\u53ef\u8bbf\u95ee\u3002
\nB. \u5982\u679c\u662f\u65b9\u6cd5\uff0c\u9664\u4e86\u8be5\u65b9\u6cd5\u53ef\u8bbf\u95ee\u5916\uff0c\u8fd8\u9700\u8981\u6ee1\u8db3\uff1a
\nb1) \u5982\u679c\u662f\u9759\u6001\u65b9\u6cd5\uff0c\u6ca1\u6709\u7279\u6b8a\u6761\u4ef6\uff1b
\nb2) \u5982\u679c\u662f\u975e\u9759\u6001\u65b9\u6cd5\uff0c\u9700\u8981\u6539\u65b9\u6cd5\u4e2d\u6ca1\u6709\u4f7f\u7528$this\uff0c\u5373\u6ca1\u6709\u8c03\u7528\u975e\u9759\u6001\u7684\u53d8\u91cf\/\u65b9\u6cd5\uff0c\u5f53\u7136\uff0c\u8c03\u7528\u9759\u6001\u7684\u53d8\u91cf\/\u65b9\u6cd5\u6ca1\u6709\u95ee\u9898\u3002<\/p>\n

\u7136\u540e\u6211\u4eec\u518d\u770b\u4e00\u4e0b\u4f7f\u7528$object->\u2026 \u548c\u4f7f\u7528class::\u2026 \u90fd\u6709\u4ec0\u4e48\u533a\u522b\uff1a
\n1. \u4f7f\u7528$object->\u2026 \uff0c\u9700\u8981\u6267\u884c\u6784\u9020\u51fd\u6570\u521b\u5efa\u5bf9\u8c61\uff1b
\n2. \u4f7f\u7528class::\u2026 \u8c03\u7528\u9759\u6001\u65b9\u6cd5\/\u53d8\u91cf\uff0c\u4e0d\u9700\u8981\u6267\u884c\u6784\u9020\u51fd\u6570\u521b\u5efa\u5bf9\u8c61\uff1b
\n3. \u4f7f\u7528class::\u2026 \u8c03\u7528\u975e\u9759\u6001\u65b9\u6cd5\/\u53d8\u91cf\uff0c\u4e5f\u4e0d\u9700\u8981\u6267\u884c\u6784\u9020\u51fd\u6570\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n

\u7136\u540e\u5947\u602a\u7684\u5730\u65b9\u5c31\u51fa\u6765\u4e86\uff0c\u65e2\u71362\u548c3\u90fd\u4e00\u6837\uff0c\u90a3\u9759\u6001\u65b9\u6cd5\/\u53d8\u91cf\u5b58\u5728\u8fd8\u6709\u4ec0\u4e48\u610f\u4e49\u5462\uff1f
\n\u9759\u6001 static
\n\u58f0\u660e\u7c7b\u6210\u5458\u6216\u65b9\u6cd5\u4e3a static \uff0c\u5c31\u53ef\u4ee5\u4e0d\u5b9e\u4f8b\u5316\u7c7b\u800c\u76f4\u63a5\u8bbf\u95ee\uff0c\u4e0d\u80fd\u901a\u8fc7\u4e00\u4e2a\u5bf9\u8c61\u6765\u8bbf\u95ee\u5176\u4e2d\u7684\u9759\u6001\u6210\u5458\uff08\u9759\u6001\u65b9\u6cd5\u9664\u5916\uff09\u3002\u9759\u6001\u6210\u5458\u5c5e\u4e8e\u7c7b\uff0c\u4e0d\u5c5e\u4e8e\u4efb\u4f55\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u4f46\u7c7b\u7684\u5bf9\u8c61\u5b9e\u4f8b\u90fd\u80fd\u5171\u4eab<\/p>\n

\n
<\/div>\n
    \n
  1. <?php  <\/span><\/span><\/li>\n
  2. Class Person{  <\/span><\/li>\n
  3.     \/\/ \u5b9a\u4e49\u9759\u6001\u6210\u5458\u5c5e\u6027<\/span>  <\/span><\/span><\/li>\n
  4.     public<\/span> <\/span>static<\/span> $country = <\/span>“\u4e2d\u56fd”<\/span>;  <\/span><\/span><\/li>\n
  5.     \/\/ \u5b9a\u4e49\u9759\u6001\u6210\u5458\u65b9\u6cd5<\/span>  <\/span><\/span><\/li>\n
  6.     public<\/span> <\/span>static<\/span> function myCountry() {  <\/span><\/span><\/li>\n
  7.         \/\/ \u5185\u90e8\u8bbf\u95ee\u9759\u6001\u6210\u5458\u5c5e\u6027<\/span>  <\/span><\/span><\/li>\n
  8.         echo “\u6211\u662f”<\/span>.self::$country.<\/span>“\u4eba<br \/>”<\/span>;  <\/span><\/span><\/li>\n
  9.     }  <\/span><\/li>\n
  10. }  <\/span><\/li>\n
  11. class<\/span> Student <\/span>extends<\/span> Person {  <\/span><\/span><\/li>\n
  12.     function study() {  <\/span><\/li>\n
  13.         echo “\u6211\u662f”<\/span>. parent::$country.<\/span>“\u4eba<br \/>”<\/span>;  <\/span><\/span><\/li>\n
  14.     }  <\/span><\/li>\n
  15. }  <\/span><\/li>\n
  16. \/\/ \u8f93\u51fa\u6210\u5458\u5c5e\u6027\u503c<\/span>  <\/span><\/span><\/li>\n
  17. echo Person::$country.“<br \/>”<\/span>;  <\/span>\/\/ \u8f93\u51fa\uff1a\u4e2d\u56fd<\/span>  <\/span><\/span><\/li>\n
  18. $p1 = new<\/span> Person();  <\/span><\/span><\/li>\n
  19. \/\/echo $p1->country;   \/\/ \u9519\u8bef\u5199\u6cd5<\/span>  <\/span><\/span><\/li>\n
  20. \/\/ \u8bbf\u95ee\u9759\u6001\u6210\u5458\u65b9\u6cd5<\/span>  <\/span><\/span><\/li>\n
  21. Person::myCountry();   \/\/ \u8f93\u51fa\uff1a\u6211\u662f\u4e2d\u56fd\u4eba<\/span>  <\/span><\/span><\/li>\n
  22. \/\/ \u9759\u6001\u65b9\u6cd5\u4e5f\u53ef\u901a\u8fc7\u5bf9\u8c61\u8bbf\u95ee\uff1a<\/span>  <\/span><\/span><\/li>\n
  23. $p1->myCountry();  <\/span><\/li>\n
  24. \/\/ \u5b50\u7c7b\u4e2d\u8f93\u51fa\u6210\u5458\u5c5e\u6027\u503c<\/span>  <\/span><\/span><\/li>\n
  25. echo Student::$country.“<br \/>”<\/span>; <\/span>\/\/ \u8f93\u51fa\uff1a\u4e2d\u56fd<\/span>  <\/span><\/span><\/li>\n
  26. $t1 = new<\/span> Student();  <\/span><\/span><\/li>\n
  27. $t1->study();    \/\/ \u8f93\u51fa\uff1a\u6211\u662f\u4e2d\u56fd\u4eba<\/span>  <\/span><\/span><\/li>\n
  28. ?>  <\/span><\/li>\n<\/ol>\n<\/div>\n
    \n
    <\/div>\n
      \n
    1. \u8fd0\u884c\u8be5\u4f8b\u5b50\uff0c\u8f93\u51fa\uff1a  <\/span><\/span><\/li>\n
    2. \u4e2d\u56fd  <\/span><\/li>\n
    3. \u6211\u662f\u4e2d\u56fd\u4eba  <\/span><\/li>\n
    4. \u6211\u662f\u4e2d\u56fd\u4eba  <\/span><\/li>\n
    5. \u4e2d\u56fd  <\/span><\/li>\n
    6. \u6211\u662f\u4e2d\u56fd\u4eba  <\/span><\/li>\n
    7. \u5c0f\u7ed3  <\/span><\/li>\n
    8. \u5728\u7c7b\u5185\u90e8\u8bbf\u95ee\u9759\u6001\u6210\u5458\u5c5e\u6027\u6216\u8005\u65b9\u6cd5\uff0c\u4f7f\u7528 self::\uff08\u6ce8\u610f\u4e0d\u662f $slef\uff09\uff0c\u5982\uff1a  <\/span><\/li>\n
    9.  \u4ee3\u7801\u5982\u4e0b   \u590d\u5236\u4ee3\u7801  <\/span><\/li>\n
    10. slef:: $country  <\/span><\/li>\n
    11. slef:: myCountry()  <\/span><\/li>\n
    12. \u5728\u5b50\u7c7b\u8bbf\u95ee\u7236\u7c7b\u9759\u6001\u6210\u5458\u5c5e\u6027\u6216\u65b9\u6cd5\uff0c\u4f7f\u7528 parent::\uff08\u6ce8\u610f\u4e0d\u662f $parent\uff09\uff0c\u5982\uff1a  <\/span><\/li>\n
    13.  \u4ee3\u7801\u5982\u4e0b   \u590d\u5236\u4ee3\u7801  <\/span><\/li>\n
    14. parent:: $country  <\/span><\/li>\n
    15. parent:: myCountry()  <\/span><\/li>\n
    16. \u5916\u90e8\u8bbf\u95ee\u9759\u6001\u6210\u5458\u5c5e\u6027\u548c\u65b9\u6cd5\u4e3a \u7c7b\u540d\/\u5b50\u7c7b\u540d:: \uff0c\u5982\uff1a  <\/span><\/li>\n
    17.  \u4ee3\u7801\u5982\u4e0b   \u590d\u5236\u4ee3\u7801  <\/span><\/li>\n
    18. Person::$country  <\/span><\/li>\n
    19. Person::myCountry()  <\/span><\/li>\n
    20. Student::$country  <\/span><\/li>\n
    21. \u4f46\u9759\u6001\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u901a\u8fc7\u666e\u901a\u5bf9\u8c61\u7684\u65b9\u5f0f\u8bbf\u95ee\u3002  <\/span><\/li>\n
    22.   <\/span><\/li>\n
    23. \u4f8b\u5b50 \u58f0\u660e\u9759\u6001\u53d8\u91cf  <\/span><\/li>\n
    24.  \u4ee3\u7801\u5982\u4e0b   \u590d\u5236\u4ee3\u7801  <\/span><\/li>\n
    25. <?PHP  <\/span><\/li>\n
    26.    function foo(){  <\/span><\/li>\n
    27.    static<\/span> $<\/span>int<\/span> = <\/span>0<\/span>;<\/span>\/\/ correct<\/span>  <\/span><\/span><\/li>\n
    28.    static<\/span> $<\/span>int<\/span> = <\/span>1<\/span>+<\/span>2<\/span>;   <\/span>\/\/ wrong (as it is an expression)<\/span>  <\/span><\/span><\/li>\n
    29.    static<\/span> $<\/span>int<\/span> = sqrt(<\/span>121<\/span>); <\/span>\/\/ wrong (as it is an expression too)<\/span>  <\/span><\/span><\/li>\n
    30.      <\/span><\/li>\n
    31.    $int<\/span>++;  <\/span><\/span><\/li>\n
    32.    echo $int<\/span>;  <\/span><\/span><\/li>\n
    33.    }  <\/span><\/li>\n
    34.    ?>  <\/span><\/li>\n
    35. \u4f8b\u5b50 \u4f7f\u7528\u9759\u6001\u53d8\u91cf\u7684\u4f8b\u5b50  <\/span><\/li>\n
    36.  \u4ee3\u7801\u5982\u4e0b   \u590d\u5236\u4ee3\u7801  <\/span><\/li>\n
    37. <?PHP  <\/span><\/li>\n
    38.    function Test()  <\/span><\/li>\n
    39.    {  <\/span><\/li>\n
    40.    static<\/span> $w3sky = <\/span>0<\/span>;  <\/span><\/span><\/li>\n
    41.    echo $w3sky;  <\/span><\/li>\n
    42.    $w3sky++;  <\/span><\/li>\n
    43.    }  <\/span><\/li>\n
    44.    ?>  <\/span><\/li>\n
    45. \u73b0\u5728\uff0c\u6bcf\u6b21\u8c03\u7528 Test() \u51fd\u6570\u90fd\u4f1a\u8f93\u51fa $w3sky \u7684\u503c\u5e76\u52a0\u4e00\u3002  <\/span><\/li>\n
    46.   <\/span><\/li>\n
    47. \u9759\u6001\u53d8\u91cf\u4e5f\u63d0\u4f9b\u4e86\u4e00\u79cd\u5904\u7406\u9012\u5f52\u51fd\u6570\u7684\u65b9\u6cd5\u3002\u9012\u5f52\u51fd\u6570\u662f\u4e00\u79cd\u8c03\u7528\u81ea\u5df1\u7684\u51fd\u6570\u3002\u5199\u9012\u5f52\u51fd\u6570\u65f6\u8981\u5c0f\u5fc3\uff0c\u56e0\u4e3a\u53ef\u80fd\u4f1a\u65e0\u7a77\u9012\u5f52\u4e0b\u53bb\u3002\u5fc5\u987b\u786e\u4fdd\u6709\u5145\u5206\u7684\u65b9\u6cd5\u6765\u4e2d\u6b62\u9012\u5f52\u3002\u4e00\u4e0b\u8fd9\u4e2a\u7b80\u5355\u7684\u51fd\u6570\u9012\u5f52\u8ba1\u6570\u5230 10<\/span>\uff0c\u4f7f\u7528\u9759\u6001\u53d8\u91cf $count \u6765\u5224\u65ad\u4f55\u65f6\u505c\u6b62\uff1a  <\/span><\/span><\/li>\n
    48. \u4f8b\u5b50 \u9759\u6001\u53d8\u91cf\u4e0e\u9012\u5f52\u51fd\u6570  <\/span><\/li>\n
    49.  \u4ee3\u7801\u5982\u4e0b   \u590d\u5236\u4ee3\u7801  <\/span><\/li>\n
    50. <?PHP  <\/span><\/li>\n
    51.    function Test()  <\/span><\/li>\n
    52.    {  <\/span><\/li>\n
    53.    static<\/span> $count = <\/span>0<\/span>;  <\/span><\/span><\/li>\n
    54.      <\/span><\/li>\n
    55.    $count++;  <\/span><\/li>\n
    56.    echo $count;  <\/span><\/li>\n
    57.    if<\/span> ($count < <\/span>10<\/span>) {  <\/span><\/span><\/li>\n
    58.    Test();  <\/span><\/li>\n
    59.    }  <\/span><\/li>\n
    60.    $count–;  <\/span><\/li>\n
    61.    }  <\/span><\/li>\n
    62.    ?>  <\/span><\/li>\n
    63. \u6ce8: \u9759\u6001\u53d8\u91cf\u53ef\u4ee5\u6309\u7167\u4e0a\u9762\u7684\u4f8b\u5b50\u58f0\u660e\u3002\u5982\u679c\u5728\u58f0\u660e\u4e2d\u7528\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u5bf9\u5176\u8d4b\u503c\u4f1a\u5bfc\u81f4\u89e3\u6790\u9519\u8bef  <\/span><\/li>\n<\/ol>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      static \u662f\u5b9a\u4e49\u4e00\u4e2a\u9759\u6001\u5bf9\u8c61\u6216\u9759\u6001\u53d8\u91cf\uff0c\u5173\u4e8estatic \u5b9a\u4e49\u7684\u53d8\u91cf\u6216\u7c7b\u65b9\u6cd5\u6709\u4ec0\u4e48\u7279\u6027\u6211\u4eec\u770b\u5b8c\u672c\u6587\u7ae0\u7684\u76f8\u5173\u5b9e\u4f8b\u540e\u5c31\u89c1\u5206\u6653\u4e86\u3002 1. \u521b\u5efa\u5bf9\u8c61$object … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[54],"tags":[],"_links":{"self":[{"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/posts\/3591"}],"collection":[{"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/comments?post=3591"}],"version-history":[{"count":0,"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/posts\/3591\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/media?parent=3591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/categories?post=3591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wpadmin.cn\/blog\/wp-json\/wp\/v2\/tags?post=3591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}