{"id":182848,"date":"2024-05-08T21:31:17","date_gmt":"2024-05-08T13:31:17","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/182848.html"},"modified":"2024-05-08T21:31:30","modified_gmt":"2024-05-08T13:31:30","slug":"php8%e4%bc%9a%e7%bb%99php%e5%b8%a6%e6%9d%a5%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/182848.html","title":{"rendered":"PHP8\u4f1a\u7ed9php\u5e26\u6765\u4ec0\u4e48"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27073207\/a0e97856-aa2a-4eab-94c3-bc6592fa35fa.webp\" alt=\"PHP8\u4f1a\u7ed9php\u5e26\u6765\u4ec0\u4e48\" \/><\/p>\n<p><p>PHP 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8\u63d0\u4f9b\u4e86\u5168\u65b0\u7684\u5339\u914d\u8868\u8fbe\u5f0f\uff08match expression\uff09\uff0c\u8fd9\u662f\u5bf9\u4f20\u7edfswitch\u8bed\u53e5\u7684\u6539\u8fdb\u3002\u5339\u914d\u8868\u8fbe\u5f0f\u5141\u8bb8\u5f00\u53d1\u8005\u7f16\u5199\u66f4\u7b80\u6d01\u3001\u53ef\u8bfb\u6027\u66f4\u5f3a\u7684\u6761\u4ef6\u5206\u652f\u4ee3\u7801\u3002<\/p>\n<\/p>\n<p><p>\u4e0eswitch\u8bed\u53e5\u76f8\u6bd4\uff0c\u5339\u914d\u8868\u8fbe\u5f0f\u5177\u6709\u4e00\u4e9b\u4f18\u52bf\uff0c\u4f8b\u5982\u5b83\u53ef\u4ee5\u8fd4\u56de\u503c\uff0c\u5e76\u4e14\u6bcf\u4e00\u4e2a\u5206\u652f\u90fd\u4e0d\u9700\u8981break\u8bed\u53e5\uff0c\u8fd9\u51cf\u5c11\u4e86\u5197\u4f59\u4ee3\u7801\u7684\u4e66\u5199\u3002\u6b64\u5916\uff0c\u5339\u914d\u8868\u8fbe\u5f0f\u5728\u6bd4\u8f83\u503c\u65f6\u4f7f\u7528\u4e25\u683c\u7c7b\u578b\u6bd4\u8f83\uff0c\u8fd9\u53ef\u4ee5\u907f\u514d\u610f\u60f3\u4e0d\u5230\u7684\u7c7b\u578b\u5f3a\u5236\u8f6c\u6362\u95ee\u9898\u3002<\/p>\n<\/p>\n<p><h3>\u4e94\u3001\u6784\u9020\u5668\u5c5e\u6027\u63d0\u5347<\/h3>\n<\/p>\n<p><p>\u5728\u4e4b\u524d\u7684PHP\u7248\u672c\u4e2d\uff0c\u7c7b\u7684\u5c5e\u6027\u9700\u8981\u5728\u7c7b\u7684\u5185\u90e8\u58f0\u660e\uff0c\u7136\u540e\u5728\u6784\u9020\u51fd\u6570\u4e2d\u8d4b\u503c\u3002PHP 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7.4\u4e2d\u52a0\u5165\u7684\u7a7a\u5408\u5e76\u8fd0\u7b97\u7b26<code>??<\/code>\u5f97\u5230\u4e86\u8fdb\u4e00\u6b65\u7684\u5f3a\u5316\uff0c\u5728PHP 8\u4e2d\uff0c\u5b83\u88ab\u6269\u5c55\u5230\u4e86\u66f4\u591a\u7684\u573a\u666f\uff0c\u901a\u8fc7<code>??=<\/code>\u8fd0\u7b97\u7b26\u63d0\u4f9b\u4e86\u7a7a\u5b89\u5168\u8d4b\u503c\u7684\u80fd\u529b\u3002\u8fd9\u5141\u8bb8\u5f00\u53d1\u8005\u7b80\u5316\u4ee3\u7801\uff0c\u5728\u53d8\u91cf\u672a\u8bbe\u7f6e\u6216\u503c\u4e3a<code>null<\/code>\u65f6\u5206\u914d\u4e00\u4e2a\u9ed8\u8ba4\u503c\u3002<\/p>\n<\/p>\n<p><p>\u8fd9\u4e2a\u7279\u6027\u8fdb\u4e00\u6b65\u4f18\u5316\u4e86PHP\u7684\u8bed\u6cd5\uff0c\u4f7f\u5f97\u5f00\u53d1\u8005\u5904\u7406<code>null<\/code>\u503c\u65f6\u53ef\u4ee5\u5199\u51fa\u66f4\u4f18\u96c5\u7684\u4ee3\u7801\u7247\u6bb5\u3002<\/p>\n<\/p>\n<p><p>PHP 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