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                # swoole\_mysql->connect [TOC] 異步連接到MySQL服務器。 ~~~ function swoole_mysql->connect(array $serverConfig, callable $callback); ~~~ * $serverConfig為MySQL服務器的配置,必須為關聯索引數組 * $callback連接完成后回調此函數 ## 服務器配置 ~~~ $server = array( 'host' => '192.168.56.102', 'user' => 'test', 'password' => 'test', 'database' => 'test', 'charset' => 'utf8', ); ~~~ * `host`MySQL服務器的主機地址,支持IPv6(`::1`)和UnixSocket(`unix:/tmp/mysql.sock`) * `port`MySQL服務器監聽的端口,選填,默認為`3306` * `user`用戶名,必填 * `password`密碼,必填 * `database`連接的數據庫,必填 * `charset`設置客戶端字符集,選填,默認使用Server返回的字符集。如果字符串不存在,底層會拋出`Swoole\MySQL\Exception`異常 ## 回調函數 ~~~ function onConnect(swoole_mysql $db, bool $result); ~~~ * $db 為swoole\_mysql對象 * $result 連接是否成功,只有為true時才可以執行`query`查詢 * $result 為false,可以通過`connect_errno`和`connect_error`得到失敗的錯誤碼和錯誤信息
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