mysql中的mysql_real_connect连接参数设置

日期：2007年4月6日作者：查看:[大字体中字体小字体]

application programs; it is set internally in the client library. Instead, use
mysql_ssl_set() before calling mysql_real_connect().

For some parameters, it is possible to have the value taken from an option file rather
than from an explicit value in the mysql_real_connect() call. To do this, call
mysql_options() with the MYSQL_READ_DEFAULT_FILE or MYSQL_READ_DEFAULT_GROUP option
before calling mysql_real_connect(). Then, in the mysql_real_connect() call, specify
the Â“no-valueÂ” value for each parameter to be read from an option file:

    *

      For host, specify a value of NULL or the empty string ("").
    *

      For user, specify a value of NULL or the empty string.
    *

      For passwd, specify a value of NULL. (For the password, a value of the empty string in
the mysql_real_connect() call cannot be overridden in an option file, because the empty
string indicates explicitly that the MySQL account must have an empty password.)
    *

      For db, specify a value of NULL or the empty string.
    *

      For port, specify a value of 0.
    *

      For unix_socket, specify a value of NULL.

If no value is found in an option file for a parameter, its default value is used as
indicated in the descriptions given earlier in this section.

Return Values

A MYSQL* connection handle if the connection was successful, NULL if the connection
was unsuccessful. For a successful connection, the return value is the same as the value
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mysql中的mysql_real_connect连接参数设置

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