{"id":47761,"date":"2024-12-02T13:01:01","date_gmt":"2024-12-02T05:01:01","guid":{"rendered":"https:\/\/fwq.ai\/blog\/47761\/"},"modified":"2024-12-02T13:01:01","modified_gmt":"2024-12-02T05:01:01","slug":"php-%e5%87%bd%e6%95%b0%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%bc%95%e7%94%a8%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aa%e4%b8%8d%e5%8f%af%e5%8f%98%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/47761\/","title":{"rendered":"PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u5411\u5927\u5bb6\u4ecb\u7ecd\u300aPHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf\u300b\uff0c\u4e3b\u8981\u5305\u62ec\uff0c\u5177\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n<p>PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u4fee\u6539\u53d8\u91cf\u503c\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7 unset() \u51fd\u6570\u5f3a\u5236\u5bf9\u5f15\u7528\u53c2\u6570\u8d4b\u503c\uff0c\u4f7f\u5176\u6210\u4e3a\u4e0d\u53ef\u53d8\u53d8\u91cf\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u5728\u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\uff08&amp;$value\uff09\u4f5c\u4e3a\u53c2\u6570\u3002\u8d4b\u503c\u7ed9\u5f15\u7528\u53d8\u91cf\u3002\u4f7f\u7528 unset() \u51fd\u6570\u6e05\u9664\u5bf9\u539f\u59cb\u53d8\u91cf\u7684\u5f15\u7528\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729934918671cb64646ee1.jpg\" class=\"aligncenter\" title=\"PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf\u63d2\u56fe\" alt=\"PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf\u63d2\u56fe\" \/><\/p>\n<p><strong>PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf<\/strong><\/p>\n<p>\u5728 PHP \u4e2d\uff0c\u4f7f\u7528\u5f15\u7528\u53ef\u4ee5\u5728\u51fd\u6570\u8c03\u7528\u671f\u95f4\u4fee\u6539\u53d8\u91cf\u7684\u503c\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u7279\u6b8a\u8bed\u6cd5 <code>unset()<\/code> \u51fd\u6570\u6765\u5f3a\u5236\u5bf9\u5f15\u7528\u53c2\u6570\u8fdb\u884c\u8d4b\u503c\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<pre>function modify_by_reference($value) {\n    $value = \"New value\";\n}\n\nfunction modify_as_immutable($&amp;value) {\n    $value = \"New value\";\n    unset($&amp;value);  \/\/ \u6e05\u9664\u5bf9\u539f\u59cb\u53d8\u91cf\u7684\u5f15\u7528\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u51fd\u6570 <code>update_user()<\/code>\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u5f15\u7528\uff08<code>&amp;$user<\/code>\uff09\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8bd5\u56fe\u66f4\u6539\u8be5\u5f15\u7528\u6307\u5411\u7684\u7528\u6237\u5bf9\u8c61\u7684\u5c5e\u6027\uff1a<\/p>\n<pre>\/\/ \u521b\u5efa\u4e00\u4e2a\u7528\u6237\u5bf9\u8c61\n$user = ['name' =&gt; 'John'];\n\n\/\/ \u4f7f\u7528\u5f15\u7528\u8c03\u7528 `update_user()` \u51fd\u6570\nupdate_user($user);\n\n\/\/ \u6253\u5370\u7528\u6237\u5bf9\u8c61\u7684\u540d\u79f0\necho $user['name'];  \/\/ \u8f93\u51fa\uff1a\"John\"<\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c<code>update_user()<\/code> \u51fd\u6570\u65e0\u6cd5\u66f4\u6539 <code>$user<\/code> \u7684\u503c\uff0c\u56e0\u4e3a\u8be5\u51fd\u6570\u53ea\u521b\u5efa\u4e86\u5bf9 <code>$user<\/code> \u53d8\u91cf\u7684\u5c40\u90e8\u526f\u672c\u3002<\/p>\n<p><strong>\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e0d\u53ef\u53d8\u53d8\u91cf<\/strong><\/p>\n<p>\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5f15\u7528\u548c <code>unset()<\/code> \u51fd\u6570\u6765\u521b\u5efa\u4e0d\u53ef\u53d8\u53d8\u91cf\uff1a<\/p>\n<pre>function update_user_as_immutable(&amp;$user) {\n    $user['name'] = \"New name\";\n    unset($user);  \/\/ \u6e05\u9664\u5bf9\u539f\u59cb\u53d8\u91cf\u7684\u5f15\u7528\n}\n\n\/\/ \u4f7f\u7528\u5f15\u7528\u8c03\u7528 `update_user_as_immutable()` \u51fd\u6570\nupdate_user_as_immutable($user);\n\n\/\/ \u6253\u5370\u7528\u6237\u5bf9\u8c61\u7684\u540d\u79f0\necho $user['name'];  \/\/ \u8f93\u51fa\uff1a\"New name\"<\/pre>\n<p>\u5728 <code>update_user_as_immutable()<\/code> \u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u4f7f\u7528 <code>unset()<\/code> \u51fd\u6570\u5220\u9664\u5bf9\u539f\u59cb\u53d8\u91cf\u7684\u5f15\u7528\u3002\u8fd9\u5c06\u5f3a\u5236 PHP \u91cd\u65b0\u8bc4\u4f30 <code>$user<\/code> \u53d8\u91cf\uff0c\u5e76\u5c06\u5176\u6307\u5411\u6307\u5411\u65b0\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u56e0\u6b64\uff0c\u5728\u51fd\u6570\u8fd4\u56de\u540e\uff0c\u539f\u59cb <code>$user<\/code> \u5bf9\u8c61\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300aPHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u7c73\u4e91\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf \u672c\u7bc7\u6587\u7ae0\u5411\u5927\u5bb6\u4ecb\u7ecd\u300aPHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf\u300b\uff0c\u4e3b\u8981\u5305\u62ec\uff0c\u5177\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002 PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u4fee\u6539\u53d8\u91cf\u503c\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7 unset() \u51fd\u6570\u5f3a\u5236\u5bf9\u5f15\u7528\u53c2\u6570\u8d4b\u503c\uff0c\u4f7f\u5176\u6210\u4e3a\u4e0d\u53ef\u53d8\u53d8\u91cf\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u5728\u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\uff08&amp;$value\uff09\u4f5c\u4e3a\u53c2\u6570\u3002\u8d4b\u503c\u7ed9\u5f15\u7528\u53d8\u91cf\u3002\u4f7f\u7528 unset() \u51fd\u6570\u6e05\u9664\u5bf9\u539f\u59cb\u53d8\u91cf\u7684\u5f15\u7528\u3002 PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u5f15\u7528\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf \u5728 PHP \u4e2d\uff0c\u4f7f\u7528\u5f15\u7528\u53ef\u4ee5\u5728\u51fd\u6570\u8c03\u7528\u671f\u95f4\u4fee\u6539\u53d8\u91cf\u7684\u503c\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u521b\u5efa\u4e00\u4e2a\u4e0d\u53ef\u53d8\u53d8\u91cf\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u7279\u6b8a\u8bed\u6cd5 unset() \u51fd\u6570\u6765\u5f3a\u5236\u5bf9\u5f15\u7528\u53c2\u6570\u8fdb\u884c\u8d4b\u503c\u3002 \u8bed\u6cd5 function modify_by_reference($value) { $value = &#8220;New value&#8221;; } function modify_as_immutable($&amp;value) { $value = &#8220;New value&#8221;; unset($&amp;value); \/\/ \u6e05\u9664\u5bf9\u539f\u59cb\u53d8\u91cf\u7684\u5f15\u7528 } \u5b9e\u6218\u6848\u4f8b \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u51fd\u6570 update_user()\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u5f15\u7528\uff08&amp;$user\uff09\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8bd5\u56fe\u66f4\u6539\u8be5\u5f15\u7528\u6307\u5411\u7684\u7528\u6237\u5bf9\u8c61\u7684\u5c5e\u6027\uff1a \/\/ \u521b\u5efa\u4e00\u4e2a\u7528\u6237\u5bf9\u8c61 $user = [&#8216;name&#8217; =&gt; &#8216;John&#8217;]; \/\/ \u4f7f\u7528\u5f15\u7528\u8c03\u7528 `update_user()` \u51fd\u6570 update_user($user); \/\/ \u6253\u5370\u7528\u6237\u5bf9\u8c61\u7684\u540d\u79f0 echo [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-47761","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47761","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=47761"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47761\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=47761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=47761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=47761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}