PHP Manual: Set options

Description

Object-oriented style

public bool mysqli::options(int $option, stringint $value)

Procedural style

bool mysqli_options(mysqli $mysql, int $option, stringint $value)

Used to set extra connect options and affect behavior for a connection.

This function may be called multiple times to set several options.

mysqli_options should be called after mysqli_init and before mysqli_real_connect.

Parameters

mysql

Procedural style only: A mysqli object returned by mysqli_connect or mysqli_init

option

The option that you want to set. It can be one of the following values:

**Valid options**
Name	Description
`MYSQLI_OPT_CONNECT_TIMEOUT`	Connection timeout in seconds
`MYSQLI_OPT_READ_TIMEOUT`	Command execution result timeout in seconds. Available as of PHP 7.2.0.
`MYSQLI_OPT_LOCAL_INFILE`	Enable/disable use of `LOAD LOCAL INFILE`
`MYSQLI_INIT_COMMAND`	Command to execute after when connecting to MySQL server
`MYSQLI_SET_CHARSET_NAME`	The charset to be set as default.
`MYSQLI_READ_DEFAULT_FILE`	Read options from named option file instead of `my.cnf` Not supported by mysqlnd.
`MYSQLI_READ_DEFAULT_GROUP`	Read options from the named group from `my.cnf` or the file specified with `MYSQL_READ_DEFAULT_FILE`. Not supported by mysqlnd.
`MYSQLI_SERVER_PUBLIC_KEY`	RSA public key file used with the SHA-256 based authentication.
`MYSQLI_OPT_NET_CMD_BUFFER_SIZE`	The size of the internal command/network buffer. Only valid for mysqlnd.
`MYSQLI_OPT_NET_READ_BUFFER_SIZE`	Maximum read chunk size in bytes when reading the body of a MySQL command packet. Only valid for mysqlnd.
`MYSQLI_OPT_INT_AND_FLOAT_NATIVE`	Convert integer and float columns back to PHP numbers when using non-prepared statements. Only valid for mysqlnd.
`MYSQLI_OPT_SSL_VERIFY_SERVER_CERT`	Whether to verify server certificate or not.

value

The value for the option.

Return Values

Returns true on success or false on failure.

Errors/Exceptions

If mysqli error reporting is enabled (MYSQLI_REPORT_ERROR) and the requested operation fails, a warning is generated. If, in addition, the mode is set to MYSQLI_REPORT_STRICT, a mysqli_sql_exception is thrown instead.

Examples

See mysqli_real_connect.

Notes

Note:
MySQLnd always assumes the server default charset. This charset is sent during connection hand-shake/authentication, which mysqlnd will use.
Libmysqlclient uses the default charset set in the my.cnf or by an explicit call to mysqli_options prior to calling mysqli_real_connect, but after mysqli_init.

mysqli::options

mysqli_options