... server connection failed 服务器连接失败 Database connection failed 连接数据库失败 Internet Connection Failed 因特网连接失败 ...
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If not, you likely get a PHP stack trace, informing you that the database connection failed or the INSERT statement did not work.
否则，您可能会得到一个php堆栈跟踪，告诉您数据库连接失败或者insert语句不工作。
If a connection cannot be made to the database management system, you receive a message indicating that the connection failed and the reason it failed when the PHP script is executed.
如果无法连接到数据库管理系统，那么在执行php脚本时，您将会收到一个消息，指出连接失败及失败的原因。
If the database connection attempt failed, then this function returns false.
如果无法建立数据库连接，那么这个函数返回false。
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