{"id":48188,"date":"2024-12-02T11:34:57","date_gmt":"2024-12-02T03:34:57","guid":{"rendered":"https:\/\/fwq.ai\/blog\/48188\/"},"modified":"2024-12-02T11:34:57","modified_gmt":"2024-12-02T03:34:57","slug":"php-%e8%87%aa%e5%87%bd%e6%95%b0%e7%bc%96%e5%86%99%e4%b8%ad%e5%b8%b8%e8%a7%81%e7%9a%84%e9%94%99%e8%af%af%e5%92%8c%e9%99%b7%e9%98%b1","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/48188\/","title":{"rendered":"PHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631"},"content":{"rendered":"

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

PHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631<\/h1>\n

\u6b22\u8fce\u5404\u4f4d\u5c0f\u4f19\u4f34\u6765\u5230\u7c73\u4e91\uff0c\u76f8\u805a\u4e8e\u6b64\u90fd\u662f\u7f18\u54c8\u54c8\u54c8\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300aPHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u975e\u5e38\u611f\u5174\u8da3\u6216\u8005\u6b63\u5728\u81ea\u5b66\uff0c\u90fd\u53ef\u4ee5\u5173\u6ce8\u6211\uff0c\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\uff01\u5f53\u7136\uff0c\u6709\u4ec0\u4e48\u5efa\u8bae\u4e5f\u6b22\u8fce\u5728\u8bc4\u8bba\u7559\u8a00\u63d0\u51fa\uff01\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

PHP \u81ea\u51fd\u6570\u7f16\u5199\u5e38\u89c1\u9519\u8bef\uff1a\u53c2\u6570\u4e0d\u5339\u914d\uff1a\u53c2\u6570\u6570\u91cf\u548c\u7c7b\u578b\u5fc5\u987b\u4e0e\u58f0\u660e\u7684\u51fd\u6570\u7b7e\u540d\u4e00\u81f4\u3002\u53d8\u91cf\u4f5c\u7528\u57df\uff1a\u5c40\u90e8\u53d8\u91cf\u65e0\u6cd5\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u3002\u8fd4\u56de\u7c7b\u578b\uff1aPHP 7.0 \u53ca\u4ee5\u4e0a\u8981\u6c42\u81ea\u51fd\u6570\u8fd4\u56de\u6307\u5b9a\u7c7b\u578b\u7684\u503c\u3002\u547d\u540d\u51b2\u7a81\uff1a\u81ea\u51fd\u6570\u540d\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u5fc5\u987b\u552f\u4e00\u3002\u5c3e\u9012\u5f52\uff1aPHP \u4e2d\u4f7f\u7528\u5c3e\u9012\u5f52\u4f1a\u9020\u6210\u5806\u6808\u6ea2\u51fa\u3002<\/p>\n

\"PHP<\/p>\n

PHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u7684\u5e38\u89c1\u9519\u8bef\u548c\u9677\u9631<\/strong><\/p>\n

\u81ea\u51fd\u6570\uff0c\u4f5c\u4e3a PHP \u8bed\u8a00\u4e2d\u589e\u5f3a\u4ee3\u7801\u590d\u7528\u548c\u7ec4\u7ec7\u6027\u7684\u5f3a\u5927\u5de5\u5177\uff0c\u5e38\u7528\u4e8e\u6a21\u5757\u5316\u548c\u7b80\u5316\u4ee3\u7801\u3002\u4f46\u5728\u7f16\u5199\u8fc7\u7a0b\u4e2d\uff0c\u4e00\u4e9b\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u56f0\u60d1\u6216\u9519\u8bef\u3002<\/p>\n

1. \u53c2\u6570\u4e0d\u5339\u914d<\/strong><\/p>\n

\u6700\u5e38\u89c1\u7684\u9519\u8bef\u4e4b\u4e00\u662f\u53c2\u6570\u4e0d\u5339\u914d\u3002\u81ea\u51fd\u6570\u7684\u53c2\u6570\u6570\u91cf\u548c\u7c7b\u578b\u5fc5\u987b\u4e0e\u51fd\u6570\u7b7e\u540d\u4e2d\u58f0\u660e\u7684\u4e00\u81f4\u3002\u5982\u679c\u53c2\u6570\u4e0d\u5339\u914d\uff0cPHP \u5c06\u629b\u51fa ArgumentCountError<\/code> \u6216 TypeError<\/code> \u7b49\u5f02\u5e38\u3002<\/p>\n

<?php\nfunction sum($a, $b) {\n    \/\/ \u81ea\u51fd\u6570\u4f7f\u7528\u4ee5\u9017\u53f7\u5206\u9694\u7684\u591a\u53c2\u6570\u5217\u8868\n    return $a + $b;\n}\n\nsum(1, 2, 3); \/\/ \u53c2\u6570\u6570\u91cf\u4e0d\u5339\u914d\nsum(1, 'string'); \/\/ \u53c2\u6570\u7c7b\u578b\u4e0d\u5339\u914d\n?><\/pre>\n
2. \u53d8\u91cf\u4f5c\u7528\u57df<\/strong><\/p>\n
\u53e6\u4e00\u4e2a\u5e38\u89c1\u7684\u9677\u9631\u662f\u53d8\u91cf\u4f5c\u7528\u57df\u3002\u81ea\u51fd\u6570\u4e2d\u7684\u5c40\u90e8\u53d8\u91cf\u65e0\u6cd5\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u3002\u5982\u679c\u9700\u8981\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u53d8\u91cf\uff0c\u5fc5\u987b\u5c06\u5176\u58f0\u660e\u4e3a\u5168\u5c40\u53d8\u91cf\u6216\u901a\u8fc7\u53c2\u6570\u4f20\u9012\u3002<\/p>\n
<?php\nfunction incrementGlobal() {\n    global $x; \/\/ \u58f0\u660e\u53d8\u91cf\u4e3a\u5168\u5c40\u53d8\u91cf\n    $x++;\n}\n\n$x = 1;\nincrementGlobal();\necho $x; \/\/ \u8f93\u51fa 2\n?><\/pre>\n
3. \u8fd4\u56de\u7c7b\u578b<\/strong><\/p>\n
PHP 7.0 \u53ca\u66f4\u9ad8\u7248\u672c\u5141\u8bb8\u5f00\u53d1\u8005\u6307\u5b9a\u81ea\u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\u3002\u5982\u679c\u81ea\u51fd\u6570\u672a\u8fd4\u56de\u6307\u5b9a\u7c7b\u578b\u7684\u503c\uff0c\u5219\u4f1a\u751f\u6210 TypeError<\/code>\u3002<\/p>\n
<?php\nfunction getInteger(): int {\n    return 1.23; \/\/ \u8fd4\u56de\u6d6e\u70b9\u6570\uff0c\u4e0e\u58f0\u660e\u7684\u8fd4\u56de\u7c7b\u578b\u4e0d\u7b26\n}\n?><\/pre>\n
4. \u547d\u540d\u51b2\u7a81<\/strong><\/p>\n
\u81ea\u51fd\u6570\u540d\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u5982\u679c\u4e00\u4e2a\u81ea\u51fd\u6570\u4e0e\u53e6\u4e00\u4e2a\u81ea\u51fd\u6570\u6216\u5185\u7f6e\u51fd\u6570\u91cd\u540d\uff0cPHP \u4f1a\u8986\u76d6\u5148\u524d\u58f0\u660e\u7684\u81ea\u51fd\u6570\u6216\u5f15\u53d1 FatalError<\/code>\u3002<\/p>\n
<?php\nfunction sum(int $a, int $b) {\n    return $a + $b;\n}\n\nfunction sum(float $a, float $b) {\n    return $a + $b; \/\/ \u4e0e\u7b2c\u4e00\u4e2a sum \u51fd\u6570\u91cd\u540d\n}\n?><\/pre>\n
5. \u4f7f\u7528\u5c3e\u9012\u5f52<\/strong><\/p>\n
\u5c3e\u9012\u5f52\u5728\u4e00\u4e9b\u7f16\u7a0b\u8bed\u8a00\u4e2d\u662f\u4e00\u79cd\u4f18\u5316\u6280\u672f\uff0c\u4f46\u5728 PHP \u4e2d\u4f7f\u7528\u5b83\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5806\u6808\u6ea2\u51fa\u3002\u81ea\u51fd\u6570\u4e2d\u7684\u6240\u6709\u9012\u5f52\u8c03\u7528\u90fd\u5fc5\u987b\u7ed3\u675f\uff0c\u4e0d\u80fd\u5728\u9012\u5f52\u8c03\u7528\u4e4b\u540e\u518d\u6267\u884c\u4efb\u4f55\u4ee3\u7801\u3002<\/p>\n
<?php\nfunction sumTailRecursive(int $n): int {\n    if ($n <= 0) {\n        return 0;\n    }\n\n    return sumTailRecursive($n - 1) + $n; \/\/ \u4f7f\u7528\u5c3e\u9012\u5f52\uff0c\u5806\u6808\u6ea2\u51fa\n}\n?><\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u81ea\u51fd\u6570\u907f\u514d\u4ee3\u7801\u91cd\u590d\u7684\u7b80\u5355\u793a\u4f8b\uff1a<\/p>\n
<?php\n\/\/ \u5b9a\u4e49\u81ea\u51fd\u6570\u6765\u8ba1\u7b97\u4e24\u4e2a\u6570\u7684\u5e73\u5747\u503c\nfunction average(float $a, float $b): float {\n    return ($a + $b) \/ 2;\n}\n\n\/\/ \u5728\u7a0b\u5e8f\u7684\u5176\u4ed6\u90e8\u5206\u4f7f\u7528\u81ea\u51fd\u6570\n$num1 = 10;\n$num2 = 20;\n$result = average($num1, $num2);\n\necho \"\u5e73\u5747\u503c\uff1a{$result}\";\n?><\/pre>\n
\u901a\u8fc7\u4e86\u89e3\u8fd9\u4e9b\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631\uff0c\u4ee5\u53ca\u901a\u8fc7\u5b9e\u6218\u6848\u4f8b\u7684\u6f14\u793a\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u63d0\u9ad8\u7f16\u5199 PHP \u81ea\u51fd\u6570\u7684\u6280\u80fd\uff0c\u6253\u9020\u66f4\u6e05\u6670\u3001\u66f4\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aPHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u7c73\u4e91\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
PHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631 \u6b22\u8fce\u5404\u4f4d\u5c0f\u4f19\u4f34\u6765\u5230\u7c73\u4e91\uff0c\u76f8\u805a\u4e8e\u6b64\u90fd\u662f\u7f18\u54c8\u54c8\u54c8\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300aPHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631\u300b\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0\u76f8\u5173\u7684\u77e5\u8bc6\u975e\u5e38\u611f\u5174\u8da3\u6216\u8005\u6b63\u5728\u81ea\u5b66\uff0c\u90fd\u53ef\u4ee5\u5173\u6ce8\u6211\uff0c\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\uff01\u5f53\u7136\uff0c\u6709\u4ec0\u4e48\u5efa\u8bae\u4e5f\u6b22\u8fce\u5728\u8bc4\u8bba\u7559\u8a00\u63d0\u51fa\uff01\u4e00\u8d77\u5b66\u4e60\uff01 PHP \u81ea\u51fd\u6570\u7f16\u5199\u5e38\u89c1\u9519\u8bef\uff1a\u53c2\u6570\u4e0d\u5339\u914d\uff1a\u53c2\u6570\u6570\u91cf\u548c\u7c7b\u578b\u5fc5\u987b\u4e0e\u58f0\u660e\u7684\u51fd\u6570\u7b7e\u540d\u4e00\u81f4\u3002\u53d8\u91cf\u4f5c\u7528\u57df\uff1a\u5c40\u90e8\u53d8\u91cf\u65e0\u6cd5\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u3002\u8fd4\u56de\u7c7b\u578b\uff1aPHP 7.0 \u53ca\u4ee5\u4e0a\u8981\u6c42\u81ea\u51fd\u6570\u8fd4\u56de\u6307\u5b9a\u7c7b\u578b\u7684\u503c\u3002\u547d\u540d\u51b2\u7a81\uff1a\u81ea\u51fd\u6570\u540d\u5728\u5f53\u524d\u4f5c\u7528\u57df\u4e2d\u5fc5\u987b\u552f\u4e00\u3002\u5c3e\u9012\u5f52\uff1aPHP \u4e2d\u4f7f\u7528\u5c3e\u9012\u5f52\u4f1a\u9020\u6210\u5806\u6808\u6ea2\u51fa\u3002 PHP \u81ea\u51fd\u6570\u7f16\u5199\u4e2d\u7684\u5e38\u89c1\u9519\u8bef\u548c\u9677\u9631 \u81ea\u51fd\u6570\uff0c\u4f5c\u4e3a PHP \u8bed\u8a00\u4e2d\u589e\u5f3a\u4ee3\u7801\u590d\u7528\u548c\u7ec4\u7ec7\u6027\u7684\u5f3a\u5927\u5de5\u5177\uff0c\u5e38\u7528\u4e8e\u6a21\u5757\u5316\u548c\u7b80\u5316\u4ee3\u7801\u3002\u4f46\u5728\u7f16\u5199\u8fc7\u7a0b\u4e2d\uff0c\u4e00\u4e9b\u5e38\u89c1\u7684\u9519\u8bef\u548c\u9677\u9631\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u56f0\u60d1\u6216\u9519\u8bef\u3002 1. \u53c2\u6570\u4e0d\u5339\u914d \u6700\u5e38\u89c1\u7684\u9519\u8bef\u4e4b\u4e00\u662f\u53c2\u6570\u4e0d\u5339\u914d\u3002\u81ea\u51fd\u6570\u7684\u53c2\u6570\u6570\u91cf\u548c\u7c7b\u578b\u5fc5\u987b\u4e0e\u51fd\u6570\u7b7e\u540d\u4e2d\u58f0\u660e\u7684\u4e00\u81f4\u3002\u5982\u679c\u53c2\u6570\u4e0d\u5339\u914d\uff0cPHP \u5c06\u629b\u51fa ArgumentCountError \u6216 TypeError \u7b49\u5f02\u5e38\u3002 <?php function sum($a, $b) { \/\/ \u81ea\u51fd\u6570\u4f7f\u7528\u4ee5\u9017\u53f7\u5206\u9694\u7684\u591a\u53c2\u6570\u5217\u8868 return $a + $b; } sum(1, 2, 3); \/\/ \u53c2\u6570\u6570\u91cf\u4e0d\u5339\u914d sum(1, ‘string’); \/\/ \u53c2\u6570\u7c7b\u578b\u4e0d\u5339\u914d ?> 2. \u53d8\u91cf\u4f5c\u7528\u57df \u53e6\u4e00\u4e2a\u5e38\u89c1\u7684\u9677\u9631\u662f\u53d8\u91cf\u4f5c\u7528\u57df\u3002\u81ea\u51fd\u6570\u4e2d\u7684\u5c40\u90e8\u53d8\u91cf\u65e0\u6cd5\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u3002\u5982\u679c\u9700\u8981\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u53d8\u91cf\uff0c\u5fc5\u987b\u5c06\u5176\u58f0\u660e\u4e3a\u5168\u5c40\u53d8\u91cf\u6216\u901a\u8fc7\u53c2\u6570\u4f20\u9012\u3002 <?php function incrementGlobal() { global $x; \/\/ \u58f0\u660e\u53d8\u91cf\u4e3a\u5168\u5c40\u53d8\u91cf […]<\/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-48188","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/48188","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=48188"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/48188\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=48188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=48188"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=48188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}