calling mysql_real_connect() you must call mysql_init() to initialize the MYSQL structure. You can change a lot of connect options with the mysql_options() call.See Section 17.2.3.47, “mysql_options()”.* The value of host may be either a hostname or an IP address. If...
mysql_real_connect 参数注意 mysql_real_connect的声明: MYSQL *mysql_real_connect(MYSQL *mysql, const char *host, const char *user, const char *passwd, const char *db, unsigned int port, const char *unix_socket, unsigned long client_flag) 以下是官网的解释,其中对于NULL,empty string,empty st...
mysqli_init():mysqli 分配,或者初始化一个 MYSQL 对象,可以作为mysqli_options()和mysqli_real_connect()函数的传入参数使用。 注意: 在调用mysqli_real_connect()函数之前调用其他的 mysqli 函数可能会调用失败。 (mysqli_options()函数除外)。
如果unix_socket不是NULL，字符串指定套接字或应该被使用的命名管道。注意host参数决定连接的类型。
mysql_real_connect() attempts to establish a connection to a MySQL database engine running on host. mysql_real_connect() must complete successfully before you can execute any other API functions that require a valid MYSQL connection handle structure. ...
mysql_real_connect() attempts to establish a connection to a MySQL database engine running on host. mysql_real_connect() must complete successfully before you can execute any other API functions that require a valid MYSQL connection handle structure. ...
If connect_timeout > 0 and it took longer than connect_timeout seconds to connect to the server or if the server died while executing the init-command. 因此mysql_real_connect()函数调用为: mysql_real_connect(mysql,"localhost","root",NULL,"test",0,NULL,0);判断是否出错,出错调用mysql_error...