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MySQLi
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# mysqli::real_connect

# mysqli_real_connect

(PHP 5)

mysqli::real_connect -- mysqli_real_connect — Opens a connection to a mysql server

### Beschreibung

Objektorientierter Stil

bool mysqli::real_connect ([ string `$host` [, string `$username` [, string `$passwd` [, string `$dbname` [, int `$port` [, string `$socket` [, int `$flags` ]]]]]]] )

Prozeduraler Stil

bool mysqli_real_connect ( mysqli `$link` [, string `$host` [, string `$username` [, string `$passwd` [, string `$dbname` [, int `$port` [, string `$socket` [, int `$flags` ]]]]]]] )

Establish a connection to a MySQL database engine.

This function differs from mysqli_connect():

- mysqli_real_connect() needs a valid object which has to be created by function mysqli_init().

- With the mysqli_options() function you can set various options for connection.

- There is a `flags` parameter.

### Parameter-Liste

`link`

  Nur bei prozeduralem Aufruf: Ein von mysqli_connect() oder mysqli_init() zurückgegebenes Verbindungsobjekt.

`host`

  Can be either a host name or an IP address. Passing the `NULL` value or the string "localhost" to this parameter, the local host is assumed. When possible, pipes will be used instead of the TCP/IP protocol.

`username`

  The MySQL user name.

`passwd`

  If provided or `NULL`, the MySQL server will attempt to authenticate the user against those user records which have no password only. This allows one username to be used with different permissions (depending on if a password as provided or not).

`dbname`

  If provided will specify the default database to be used when performing queries.

`port`

  Specifies the port number to attempt to connect to the MySQL server.

`socket`

  Specifies the socket or named pipe that should be used.

  > Hinweis: Specifying the `socket` parameter will not explicitly determine the type of connection to be used when connecting to the MySQL server. How the connection is made to the MySQL database is determined by the `host` parameter.

`flags`

  With the parameter `flags` you can set different connection options:

  Supported flags
  Name | Description
  --- | ---
  `MYSQLI_CLIENT_COMPRESS` | Use compression protocol
  `MYSQLI_CLIENT_FOUND_ROWS` | return number of matched rows, not the number of affected rows
  `MYSQLI_CLIENT_IGNORE_SPACE` | Allow spaces after function names. Makes all function names reserved words.
  `MYSQLI_CLIENT_INTERACTIVE` | Allow interactive_timeout seconds (instead of wait_timeout seconds) of inactivity before closing the connection
  `MYSQLI_CLIENT_SSL` | Use SSL (encryption)

  > Hinweis: For security reasons the `MULTI_STATEMENT` flag is not supported in PHP. If you want to execute multiple queries use the mysqli_multi_query() function.

### Rückgabewerte

Gibt bei Erfolg `TRUE` zurück. Im Fehlerfall wird `FALSE` zurückgegeben.

### Beispiele

Beispiel #1 mysqli::real_connect example

Objektorientierter Stil

`<?php
$mysqli = mysqli_init();
if (!$mysqli) {
die('mysqli_init failed');
}
if (!$mysqli->options(MYSQLI_INIT_COMMAND, 'SET AUTOCOMMIT = 0')) {
die('Setting MYSQLI_INIT_COMMAND failed');
}
if (!$mysqli->options(MYSQLI_OPT_CONNECT_TIMEOUT, 5)) {
die('Setting MYSQLI_OPT_CONNECT_TIMEOUT failed');
}
if (!$mysqli->real_connect('localhost', 'my_user', 'my_password', 'my_db')) {
die('Connect Error (' . mysqli_connect_errno() . ') '
. mysqli_connect_error());
}
echo 'Success... ' . $mysqli->host_info . "\n";
$mysqli->close();
?>`

Objektorientierter Stil when extending mysqli class

`<?php
class foo_mysqli extends mysqli {
public function __construct($host, $user, $pass, $db) {
parent::init();
if (!parent::options(MYSQLI_INIT_COMMAND, 'SET AUTOCOMMIT = 0')) {
die('Setting MYSQLI_INIT_COMMAND failed');
}
if (!parent::options(MYSQLI_OPT_CONNECT_TIMEOUT, 5)) {
die('Setting MYSQLI_OPT_CONNECT_TIMEOUT failed');
}
if (!parent::real_connect($host, $user, $pass, $db)) {
die('Connect Error (' . mysqli_connect_errno() . ') '
. mysqli_connect_error());
}
}
}
$db = new foo_mysqli('localhost', 'my_user', 'my_password', 'my_db');
echo 'Success... ' . $db->host_info . "\n";
$db->close();
?>`

Prozeduraler Stil

`<?php
$link = mysqli_init();
if (!$link) {
die('mysqli_init failed');
}
if (!mysqli_options($link, MYSQLI_INIT_COMMAND, 'SET AUTOCOMMIT = 0')) {
die('Setting MYSQLI_INIT_COMMAND failed');
}
if (!mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 5)) {
die('Setting MYSQLI_OPT_CONNECT_TIMEOUT failed');
}
if (!mysqli_real_connect($link, 'localhost', 'my_user', 'my_password', 'my_db')) {
die('Connect Error (' . mysqli_connect_errno() . ') '
. mysqli_connect_error());
}
echo 'Success... ' . mysqli_get_host_info($link) . "\n";
mysqli_close($link);
?>`

The above examples will output:

    Success... MySQL host info: localhost via TCP/IP

### Siehe auch

- mysqli_connect() - Alias von mysqli::__construct
- mysqli_init() - Initializes MySQLi and returns a resource for use with mysqli_real_connect()
- mysqli_options() - Set options
- mysqli_ssl_set() - Used for establishing secure connections using SSL
- mysqli_close() - Closes a previously opened database connection

mysqli::query
mysqli::real_escape_string
MySQLi
PHP Manual