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mysqli_real_connect

(PHP 5 CVS only)

mysqli_real_connect

(no version information, might be only in CVS)

mysqli->real_connect -- Opens a connection to a mysql server

Description

Procedural style

bool mysqli_real_connect ( object link [, string hostname [, string username [, string passwd [, string dbname [, int port [, string socket [, int flags]]]]]]])

Object oriented style (method)

class mysqli {

bool real_connect ( [string hostname [, string username [, string passwd [, string dbname [, int port [, string socket [, int flags]]]]]]])

}

mysql_real_connect() attempts to establish a connection to a MySQL database engine running on host.

This function differs from mysqli_connect():

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

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

  • With the parameter flags you can set diffrent connection options:

    表格 1. Supported flags

    NameDescription
    MYSQLI_CLIENT_COMPRESSUse compression protocol
    MYSQLI_CLIENT_FOUND_ROWSreturn number of matched rows, not the number of affected rows
    MYSQLI_CLIENT_IGNORE_SPACEAllow 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_SSLUse SSL (encryption)

    注: 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.

返回值

如果成功则返回 TRUE，失败则返回 FALSE。

相关参考

mysqli_connect(), mysqli_init(), mysqli_options(), mysqli_ssl_set(), mysqli_close().

Example

例子 1. Object oriented style

<?php

/* create a connection object which is not connected */
$mysqli = mysqli_init();

/* set connection options */
$mysqli->options(MYSQLI_INIT_COMMAND, "SET AUTOCOMMIT=0");
$mysqli->options(MYSQLI_OPT_CONNECT_TIMEOUT, 5);

/* connect to server */
$mysqli->real_connect('localhost', 'my_user', 'my_password', 'world');

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

printf ("Connection: %s\n.", $mysqli->host_info);

$mysqli->close();
?>

例子 2. Procedural style

<?php

/* create a connection object which is not connected */
$link = mysqli_init();

/* set connection options */
mysqli_options($link, MYSQLI_INIT_COMMAND, "SET AUTOCOMMIT=0");
mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 5);

/* connect to server */
mysqli_real_connect($link, 'localhost', 'my_user', 'my_password', 'world');

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

printf ("Connection: %s\n.", mysqli_get_host_info($link));

mysqli_close($link);
?>

The above examples would produce the following output: 

Connection: Localhost via UNIX socket


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mysqli_query上一级mysqli_real_escape_string