{"id":46770,"date":"2024-12-02T15:04:01","date_gmt":"2024-12-02T07:04:01","guid":{"rendered":"https:\/\/fwq.ai\/blog\/46770\/"},"modified":"2024-12-02T15:04:01","modified_gmt":"2024-12-02T07:04:01","slug":"php-%e5%87%bd%e6%95%b0%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e6%8a%80%e5%b7%a7%e6%b7%b1%e5%85%a5%e6%b5%85%e5%87%ba","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/46770\/","title":{"rendered":"PHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\u6df1\u5165\u6d45\u51fa"},"content":{"rendered":"

<\/b> <\/p>\n

PHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\u6df1\u5165\u6d45\u51fa<\/h1>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587\u300aPHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\u6df1\u5165\u6d45\u51fa\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u7c73\u4e91\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n

PHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\uff1a\u51cf\u5c11\u51fd\u6570\u8c03\u7528\u6b21\u6570\u4f7f\u7528\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\u907f\u514d\u52a8\u6001\u51fd\u6570\u8c03\u7528\u5584\u7528\u51fd\u6570\u7f13\u5b58\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u9519\u8bef\u68c0\u67e5\u4f18\u5316\u6280\u5de7\u5e94\u7528\u793a\u4f8b\uff1a\u4f7f\u7528\u6570\u7ec4\u6c42\u548c\u51fd\u6570\u548c\u7f13\u5b58\u8ba1\u6570\u663e\u8457\u63d0\u5347 calculate_average() \u51fd\u6570\u6027\u80fd\u3002<\/p>\n

\"PHP<\/p>\n

PHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\u6df1\u5165\u6d45\u51fa<\/strong><\/p>\n

\u5728 PHP \u5f00\u53d1\u4e2d\uff0c\u4f18\u5316\u51fd\u6570\u6027\u80fd\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c\u3002\u4ee5\u4e0b\u4ecb\u7ecd\u51e0\u79cd\u5b9e\u7528\u7684\u6027\u80fd\u4f18\u5316\u6280\u5de7\uff1a<\/p>\n

1. \u51cf\u5c11\u51fd\u6570\u8c03\u7528\u6b21\u6570<\/strong><\/p>\n

\u8fc7\u591a\u7684\u51fd\u6570\u8c03\u7528\u4f1a\u589e\u52a0\u6267\u884c\u65f6\u95f4\u3002\u5728\u5faa\u73af\u6216\u5d4c\u5957\u7ed3\u6784\u4e2d\uff0c\u5c3d\u91cf\u51cf\u5c11\u5bf9\u540c\u4e00\u51fd\u6570\u7684\u91cd\u590d\u8c03\u7528\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u53d8\u91cf\u5b58\u50a8\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff0c\u907f\u514d\u591a\u6b21\u8c03\u7528\uff1a<\/p>\n

$items = [1, 2, 3, 4, 5];\n$count = count($items); \/\/ \u53ea\u8c03\u7528\u4e00\u6b21 count()\nfor ($i = 0; $i < $count; $i++) {\n    \/\/ \u4f7f\u7528 $count \u4ee3\u66ff count($items)\n}<\/pre>\n
2. \u4f7f\u7528\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784<\/strong><\/p>\n
\u6570\u7ec4\u7684\u8bbf\u95ee\u6548\u7387\u9ad8\u4e8e\u94fe\u8868\u548c\u6811\u5f62\u7ed3\u6784\u3002\u5728\u9700\u8981\u9891\u7e41\u8bbf\u95ee\u7684\u6570\u636e\u96c6\u5408\u4e2d\uff0c\u5c3d\u91cf\u4f7f\u7528\u6570\u7ec4\u3002\u6b64\u5916\uff0c\u5bf9\u4e8e\u952e\u503c\u5bf9\u7684\u5b58\u50a8\uff0c\u4f7f\u7528\u54c8\u5e0c\u8868\u6bd4\u987a\u5e8f\u6570\u7ec4\u66f4\u6709\u6548\u7387\u3002<\/p>\n
3. \u907f\u514d\u52a8\u6001\u51fd\u6570\u8c03\u7528<\/strong><\/p>\n
\u4f7f\u7528\u52a8\u6001\u51fd\u6570\u8c03\u7528\uff08\u4f8b\u5982 call_user_func()<\/code>\uff09\u4f1a\u5f71\u54cd\u6027\u80fd\u3002\u5982\u679c\u8c03\u7528\u9891\u7387\u8f83\u9ad8\u7684\u51fd\u6570\uff0c\u5efa\u8bae\u4f7f\u7528\u9759\u6001\u51fd\u6570\u8c03\u7528\u3002<\/p>\n
4. \u5584\u7528\u51fd\u6570\u7f13\u5b58<\/strong><\/p>\n
\u5bf9\u4e8e\u9891\u7e41\u6267\u884c\u4e14\u7ed3\u679c\u4e0d\u53d8\u7684\u51fd\u6570\uff0c\u4f7f\u7528\u7f13\u5b58\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 static<\/code> \u6216 Closure<\/code> \u6765\u7f13\u5b58\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff1a<\/p>\n
function slow_function() {\n    \/\/ \u8017\u65f6\u64cd\u4f5c\n}\n\nfunction fast_function() {\n    static $result;\n    if ($result === null) {\n        $result = slow_function();\n    }\n    return $result;\n}<\/pre>\n
5. \u907f\u514d\u4e0d\u5fc5\u8981\u7684\u9519\u8bef\u68c0\u67e5<\/strong><\/p>\n
\u5728 PHP \u4e2d\uff0c\u9519\u8bef\u68c0\u67e5\u662f\u5fc5\u8981\u7684\uff0c\u4f46\u8fc7\u591a\u7684\u9519\u8bef\u68c0\u67e5\u4f1a\u6d88\u8017\u6027\u80fd\u3002\u5982\u679c\u65ad\u8a00\u53ef\u4ee5\u786e\u4fdd\u67d0\u4e00\u6761\u4ef6\u6210\u7acb\uff0c\u5219\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u9519\u8bef\u68c0\u67e5\u3002<\/p>\n
if (isset($data['id']) && $data['id'] > 0) {\n    \/\/ ...\n}\n\n\/\/ \u53ef\u4ee5\u7b80\u5316\u4e3a\uff1a\nif (assert(isset($data['id']) && $data['id'] > 0)) {\n    \/\/ ...\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u4e0a\u8ff0\u6280\u5de7\u4f18\u5316\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n
\/\/ \u4f18\u5316\u524d\u7684\u4ee3\u7801\nfunction calculate_average(array $numbers) {\n    $sum = 0;\n    foreach ($numbers as $number) {\n        $sum += $number;\n    }\n    return $sum \/ count($numbers);\n}\n\n\/\/ \u4f18\u5316\u540e\u7684\u4ee3\u7801\nfunction calculate_average(array $numbers) {\n    $count = count($numbers);\n    $sum = array_sum($numbers);\n    return $sum \/ $count;\n}<\/pre>\n
\u901a\u8fc7\u4f7f\u7528\u6570\u7ec4\u6c42\u548c\u51fd\u6570 ( array_sum() ) \u548c\u7f13\u5b58\u8ba1\u6570 ($count)\uff0c\u4f18\u5316\u540e\u7684\u4ee3\u7801\u663e\u8457\u51cf\u5c11\u4e86\u51fd\u6570\u8c03\u7528\u6b21\u6570\u548c\u5faa\u73af\u6b21\u6570\uff0c\u4ece\u800c\u63d0\u5347\u4e86\u6027\u80fd\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
PHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\u6df1\u5165\u6d45\u51fa \u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587\u300aPHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\u6df1\u5165\u6d45\u51fa\u300b\u4e3b\u8981\u8bb2\u89e3\u4e86\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u7c73\u4e91\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01 PHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\uff1a\u51cf\u5c11\u51fd\u6570\u8c03\u7528\u6b21\u6570\u4f7f\u7528\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\u907f\u514d\u52a8\u6001\u51fd\u6570\u8c03\u7528\u5584\u7528\u51fd\u6570\u7f13\u5b58\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u9519\u8bef\u68c0\u67e5\u4f18\u5316\u6280\u5de7\u5e94\u7528\u793a\u4f8b\uff1a\u4f7f\u7528\u6570\u7ec4\u6c42\u548c\u51fd\u6570\u548c\u7f13\u5b58\u8ba1\u6570\u663e\u8457\u63d0\u5347 calculate_average() \u51fd\u6570\u6027\u80fd\u3002 PHP \u51fd\u6570\u6027\u80fd\u4f18\u5316\u6280\u5de7\u6df1\u5165\u6d45\u51fa \u5728 PHP \u5f00\u53d1\u4e2d\uff0c\u4f18\u5316\u51fd\u6570\u6027\u80fd\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c\u3002\u4ee5\u4e0b\u4ecb\u7ecd\u51e0\u79cd\u5b9e\u7528\u7684\u6027\u80fd\u4f18\u5316\u6280\u5de7\uff1a 1. \u51cf\u5c11\u51fd\u6570\u8c03\u7528\u6b21\u6570 \u8fc7\u591a\u7684\u51fd\u6570\u8c03\u7528\u4f1a\u589e\u52a0\u6267\u884c\u65f6\u95f4\u3002\u5728\u5faa\u73af\u6216\u5d4c\u5957\u7ed3\u6784\u4e2d\uff0c\u5c3d\u91cf\u51cf\u5c11\u5bf9\u540c\u4e00\u51fd\u6570\u7684\u91cd\u590d\u8c03\u7528\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u53d8\u91cf\u5b58\u50a8\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff0c\u907f\u514d\u591a\u6b21\u8c03\u7528\uff1a $items = [1, 2, 3, 4, 5]; $count = count($items); \/\/ \u53ea\u8c03\u7528\u4e00\u6b21 count() for ($i = 0; $i < $count; $i++) { \/\/ \u4f7f\u7528 $count \u4ee3\u66ff count($items) } 2. \u4f7f\u7528\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784 \u6570\u7ec4\u7684\u8bbf\u95ee\u6548\u7387\u9ad8\u4e8e\u94fe\u8868\u548c\u6811\u5f62\u7ed3\u6784\u3002\u5728\u9700\u8981\u9891\u7e41\u8bbf\u95ee\u7684\u6570\u636e\u96c6\u5408\u4e2d\uff0c\u5c3d\u91cf\u4f7f\u7528\u6570\u7ec4\u3002\u6b64\u5916\uff0c\u5bf9\u4e8e\u952e\u503c\u5bf9\u7684\u5b58\u50a8\uff0c\u4f7f\u7528\u54c8\u5e0c\u8868\u6bd4\u987a\u5e8f\u6570\u7ec4\u66f4\u6709\u6548\u7387\u3002 3. \u907f\u514d\u52a8\u6001\u51fd\u6570\u8c03\u7528 \u4f7f\u7528\u52a8\u6001\u51fd\u6570\u8c03\u7528\uff08\u4f8b\u5982 call_user_func()\uff09\u4f1a\u5f71\u54cd\u6027\u80fd\u3002\u5982\u679c\u8c03\u7528\u9891\u7387\u8f83\u9ad8\u7684\u51fd\u6570\uff0c\u5efa\u8bae\u4f7f\u7528\u9759\u6001\u51fd\u6570\u8c03\u7528\u3002 4. \u5584\u7528\u51fd\u6570\u7f13\u5b58 \u5bf9\u4e8e\u9891\u7e41\u6267\u884c\u4e14\u7ed3\u679c\u4e0d\u53d8\u7684\u51fd\u6570\uff0c\u4f7f\u7528\u7f13\u5b58\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 static […]<\/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-46770","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46770","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=46770"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46770\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=46770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=46770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=46770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}