mysqli::real_connect

mysqli_real_connect

(PHP 5, PHP 7)

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

Descrierea

Stil obiect-orientat

public mysqli::real_connect ( string $host = ? , string $username = ? , string $passwd = ? , string $dbname = ? , int $port = ? , string $socket = ? , int $flags = ? ) : bool

Stil procedural

mysqli_real_connect ( mysqli $link , string $host = ? , string $username = ? , string $passwd = ? , string $dbname = ? , int $port = ? , string $socket = ? , int $flags = ? ) : bool

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.

Parametri

link

Numai stilul procedural: Un identificator al legăturii întors de mysqli_connect() sau mysqli_init()

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.

Notă:
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)
`MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT`	Like `MYSQLI_CLIENT_SSL`, but disables validation of the provided SSL certificate. This is only for installations using MySQL Native Driver and MySQL 5.6 or later.

Notă:
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.

Istoricul schimbărilor

Versiune	Descriere
5.6.16	Added the `MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT` flag for MySQL Native Driver

Valorile întoarse

Întoarce valoarea true în cazul succesului sau false în cazul eșecului.

Exemple

Example #1 mysqli::real_connect() example

Stil obiect-orientat


<?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();
?>

Stil obiect-orientat 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();
?>

Stil procedural


<?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);
?>

Exemplele de mai sus vor afișa:

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

Note

Notă:
MySQLnd întotdeauna preia setul de caractere implicit de pe server. Acest set de caractere este transmis în momentul stabilirii parametrilor/autentificării la conectare și este utilizat ulterior de mysqlnd.
Libmysqlclient utilizează setul de caractere implicit stabilit în fișierul my.cnf sau printr-un apel explicit al funcției mysqli_options() înainte de apelul mysqli_real_connect(), dar după mysqli_init().

A se vedea și

mysqli_connect() - Pseudonim pentru mysqli::__construct
mysqli_init() - Initializes MySQLi and returns an object 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

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User Contributed Notes 2 notes

down

Pom ¶

14 years ago


Notice that when using "localhost" as hostname the port option might be ignored. 

If you wish to connect thru a different port than default, substitute "127.0.0.1" for localhost.

down

php-nospam325123 at brainpower dot no-ip dot org ¶

13 years ago


this is because it tries to use sockets with the string localhost this is documented en known

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