Edit Report a Bug

mysqli::options

mysqli_options

(PHP 5, PHP 7)

mysqli::options -- mysqli_options — Set options

설명

객체 기반 형식

bool mysqli::options ( int $option , mixed $value )

절차식 형식

bool mysqli_options ( mysqli $link , int $option , mixed $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().

인수

link

순차 형식 전용: mysqli_connect()나 mysqli_init()가 반환한 연결 식별자.

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 (supported on Windows with TCP/IP since PHP 5.3.1)
`MYSQLI_OPT_LOCAL_INFILE`	enable/disable use of LOAD LOCAL INFILE
`MYSQLI_INIT_COMMAND`	command to execute after when connecting to MySQL server
`MYSQLI_READ_DEFAULT_FILE`	Read options from named option file instead of `my.cnf`
`MYSQLI_READ_DEFAULT_GROUP`	Read options from the named group from `my.cnf` or the file specified with `MYSQL_READ_DEFAULT_FILE`.
`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. Only valid for mysqlnd.
`MYSQLI_OPT_SSL_VERIFY_SERVER_CERT`

value

The value for the option.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

변경점

버전	설명
5.5.0	The `MYSQLI_SERVER_PUBLIC_KEY` and `MYSQLI_SERVER_PUBLIC_KEY` options were added.
5.3.0	The `MYSQLI_OPT_INT_AND_FLOAT_NATIVE`, `MYSQLI_OPT_NET_CMD_BUFFER_SIZE`, `MYSQLI_OPT_NET_READ_BUFFER_SIZE`, and `MYSQLI_OPT_SSL_VERIFY_SERVER_CERT` options were added.

예제

See mysqli_real_connect().

주의

Note:
MySQLnd는 항상 서버 기본 문자셋을 가정합니다. 이 문자셋은 접속/인증 중에 보내져서 mysqlnd가 사용하게 합니다.
Libmysqlclient는 my.cnf의 기본 문자셋을 사용하거나, mysqli_init() 이후, mysqli_real_connect() 이전에 명시적으로 호출한 mysqli_options()로 지정할 수 있습니다.

참고

mysqli_init() - Initializes MySQLi and returns a resource for use with mysqli_real_connect()
mysqli_real_connect() - Opens a connection to a mysql server

add a note

User Contributed Notes 6 notes

down

php at darkain dot com ¶

6 years ago


There is an undocumented option: MYSQLI_OPT_READ_TIMEOUT. This is similar to MYSQLI_OPT_CONNECT_TIMEOUT in theory, but has a slightly different application. Connection timeout only specifies the wait time for the initial TCP connection. Once that is created, the timeout no longer applies. Read timeout, however, is from the time the TCP connection is created until the first packet of actual data is received. There are instances where a TCP connection can be established, but the MySQL server stalls indefinitely, preventing execution from ever returning to PHP. Specifying a read timeout alleviates this condition, whereas connect timeout wouldn't. 

If the MYSQLI_OPT_READ_TIMEOUT constant isn't defined, it is still supported on versions where that isn't the case. You can define it yourself in older PHP versions with the following code.

<?php
if (!defined('MYSQLI_OPT_READ_TIMEOUT')) {
    define ('MYSQLI_OPT_READ_TIMEOUT', 11);
}
?>

You can then use read timeout the same way you could a connect timeout as follows. Please note that since these are two different timeout values for two different parts of the entire connection process, the timeouts do stack (eg: 10 seconds connect timeout + 10 seconds read timeout = maximum possible timeout of 20 seconds)

<?php
//create the object
$connection = mysqli_init();

//specify the connection timeout
$connection->options(MYSQLI_OPT_CONNECT_TIMEOUT, 10);

//specify the read timeout
$connection->options(MYSQLI_OPT_READ_TIMEOUT, 10);

//initiate the connection to the server, using both previously specified timeouts
$connection->real_connect('server', 'user', 'pass', 'database');
?>

down

fluppy ¶

17 years ago


Here es little example to create a SSL Connection



<?php



$db = mysqli_init();



/*

When you want so use a separate cnf

$test = $db->options(MYSQLI_EAD_DEFAULT_FILE,'myother.cnf');

*/



$db->ssl_set('server-key.pem','server-cert.pem',

'cacert.pem',NULL,NULL);



$db->real_connect('localhost','root','','mydb');



//Here some query



$db->close();



?>

down

Procedural Man ¶

2 years ago


Although it is not explained on the manual, MYSQLI_OPT_SSL_VERIFY_SERVER_CERT is an option only valid for mysqlnd and will raise an error if used with mysqli.

down

Guy Sartorelli ¶

1 year ago


The `MYSQLI_OPT_SSL_VERIFY_SERVER_CERT` seems to always fail, with `options()` always returning false.
Use the `MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT` flag with `real_connect()` instead.

down

puneetsharam9 at hotmail dot com ¶

2 years ago


With Objective Approach  
init of mysqli is depreciated from 8.1 it seem so
You could have to use an empty __construct()
So You have proper int and float 

class DB extends \mysqli {
   private function __construct(
           private $_user = DBUSER,
           private $_pass = DBPWD,
           private $_dbName = DBNAME,
           private $_dbHost = DBHOST,
   ) {
      parent::__construct();
      parent::options(MYSQLI_OPT_INT_AND_FLOAT_NATIVE, 1);
      parent::real_connect($this->_dbHost, $this->_user, $this->_pass, $this->_dbName);
      }
   }

down

-2

king at bobfish dot org ¶

16 years ago


Example on using mysqli_options to increase size of max_allowed_packet for working with big blobs.

function dbConnect()
{
   $user = 'jomama';
   $pass = 'cartoon';
   $dbName = 'LifeCycle';
   $host = 'localhost';

   $mysqli = mysqli_init();
   mysqli_options($mysqli,MYSQLI_READ_DEFAULT_GROUP,
                                    "max_allowed_packet=50M");
   mysqli_real_connect($mysqli,$host, $user, $pass,$dbName) 
                  or die ('<P>Unable to connect</P>');

   return $mysqli;
}

add a note