\u5f53\u5728\u4f1a\u8bdd\u5904\u7406\u7a0b\u5e8f\u4e2d\u8fdb\u884c\u4f1a\u8bdd\u7ba1\u7406\u65f6\uff0c\u8c03\u7528session_start()\u4f1a\u5f15\u53d1\u4ee5\u4e0b\u9519\u8bef\u3002<\/p>\n
session_start(): Failed to read session data: user (path: \/var\/lib\/php\/session) in ...\r\n<\/code><\/pre>\n\u672c\u6587\u5217\u4e3e\u4e86\u9519\u8bef\u7684\u539f\u56e0\u548c\u89e3\u51b3\u65b9\u6cd5\u4f5c\u4e3a\u5907\u5fd8\u5f55\u3002<\/p>\n
\u5bfc\u81f4\u8fd9\u4e00\u73b0\u8c61\u7684\u56e0\u7d20<\/h1>\n\u4f1a\u8bdd\u5904\u7406\u7a0b\u5e8f\u7684\u5b9e\u65bd\u6d41\u7a0b<\/h4>\n\n- \n
session_set_save_handler\u95a2\u6570\u3092\u5b9a\u7fa9<\/ul>\n<\/li>\n<\/ul>\n <\/p>\n
\n- \n
\u95a2\u6570\u306e\u8aac\u660e\u306f\u516c\u5f0f\u3092\u53c2\u7167<\/ul>\n<\/li>\n<\/ul>\n <\/p>\n
\n- \n
session_set_save_handler\u95a2\u6570\u306bSessionHandlerInterface\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6e21\u3059<\/ul>\n<\/li>\n<\/ul>\n <\/p>\n
SessionHandlerInterface\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e6\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b<\/ul>\n\n- \n
\u5173\u95ed(): bool<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u9500\u6bc1(string $sessionId): bool<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u5783\u573e\u56de\u6536(int $lifetime): bool<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u6253\u5f00(string $savePath, string $sessionName): bool<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u8bfb\u53d6(string $sessionId): string<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\u5199\u5165(string $sessionId, string $data): bool<\/ol>\n\u6839\u636e”\u4eca\u56de\u306e\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306fFailed to read session data\u301c\u306e\u901a\u308a\u3001read\u30e1\u30bd\u30c3\u30c9\u306e\u90e8\u5206\u304c\u8a72\u5f53\u3057\u3066\u3044\u308b\u3068\u8aad\u307f\u53d6\u308c\u308b”\uff0c\u5728\u641c\u7d22\u5b98\u65b9\u7684session_start\u51fd\u6570\u4e2d\u662f\u5426\u63d0\u5230\u4e86\u5173\u4e8e\u9519\u8bef\u6d88\u606f\u7684\u90e8\u5206\uff0c\u627e\u5230\u4e86\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n
If you are using a custom session handler via session_set_save_handler() then calling session_start() in PHP 7.1 you might see an error like this:\r\nsession_start(): Failed to read session data: user (path: \/var\/lib\/php\/session) in ...\r\n\r\nAs of this writing, it seems to be happening in PHP 7.1, and things look OK in PHP7.0.\r\n\r\nIt is also hard to track down because if a session already exists for this id (maybe created by an earlier version of PHP), it will not trigger this issue because the $session_data will not be null.\r\n\r\nThe fix is simple... you just need to check for 'null' during your read function:\r\n\r\n<?php\r\n\r\nfunction read($id)\r\n{\r\n \/\/... pull the data out of the DB, off the disk, memcache, etc\r\n $session_data = getSessionDataFromSomewhere($id);\r\n\r\n \/\/check to see if $session_data is null before returning (CRITICAL)\r\n if(is_null($session_data))\r\n {\r\n $session_data = ''; \/\/use empty string instead of null!\r\n }\r\n\r\n return $session_data;\r\n}\r\n\r\n?>\r\n<\/code><\/pre>\n\u770b\u8d77\u6765\uff0c\u8fd4\u56de\u503c\u4e3anull\u5bfc\u81f4\u4e86\u8fd9\u6b21\u9519\u8bef\u7684\u53d1\u751f\u7684\u6837\u5b50…<\/h6>\n\u5e94\u5bf9\u4e4b\u7b56<\/h1>\n
\u6839\u636e\u5148\u524d\u7684\u641c\u7d22\u7ed3\u679c\u53c2\u8003\uff0c\u68c0\u67e5\u8fd4\u56de\u503c\u662f\u5426\u4e3anull\uff0c\u5982\u679c\u4e3a\u7a7a\uff0c\u5219\u8fd4\u56de\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n
\/\/check to see if $session_data is null before returning (CRITICAL)\r\n if(is_null($session_data))\r\n {\r\n $session_data = ''; \/\/use empty string instead of null!\r\n }\r\n\r\n return $session_data;\r\n<\/code><\/pre>\n\u7ed3\u675f\u4e86<\/h1>\n
\u5728\u8c03\u7528read\u65b9\u6cd5\u83b7\u53d6\u6570\u636e\u5e93\u65f6\uff0c\u5982\u679c\u8fd4\u56de\u7ed3\u679c\u4e3a0\u6761\u6570\u636e\uff0c\u4e4b\u524d\u5c06\u8fd4\u56de\u503c\u8bbe\u4e3anull\uff0c\u56e0\u6b64\u5bfc\u81f4\u4e86\u672c\u6b21\u9519\u8bef\u7684\u53d1\u751f\u3002\u5728\u89e3\u51b3\u9519\u8bef\u540e\uff0c\u6211\u4ed4\u7ec6\u67e5\u770b\u4e86\u5b98\u65b9read\u65b9\u6cd5\u7684\u8bf4\u660e\uff0c\u53d1\u73b0\u5f53\u6ca1\u6709\u83b7\u53d6\u5230\u6709\u6548\u6570\u636e\u65f6\u5e94\u8fd4\u56de\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n
\u56de\u8c03\u51fd\u6570\u5fc5\u987b\u8fd4\u56de\u4e00\u4e2a\u7ecf\u8fc7\u4f1a\u8bdd\u7f16\u7801\uff08\u5e8f\u5217\u5316\uff09\u7684\u5b57\u7b26\u4e32\u3002\u5982\u679c\u6ca1\u6709\u8bfb\u53d6\u5230\u4efb\u4f55\u6570\u636e\uff0c\u5c31\u8fd4\u56de\u7a7a\u5b57\u7b26\u4e32\u3002<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148 \u5f53\u5728\u4f1a\u8bdd\u5904\u7406\u7a0b\u5e8f\u4e2d\u8fdb\u884c\u4f1a\u8bdd\u7ba1\u7406\u65f6\uff0c\u8c03\u7528session_start()\u4f1a\u5f15\u53d1\u4ee5\u4e0b\u9519\u8bef\u3002 session_s […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-34572","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n
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