# mysql_get_proto_info

(PHP 4 >= 4.0.5, PHP 5, PECL mysql:1.0)

mysql_get_proto_info — Get MySQL protocol info

### Description

int mysql_get_proto_info ([ resource `$link_identifier` ] )

Retrieves the MySQL protocol.

### Parameters

`link_identifier`

  The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() was called with no arguments. If by chance no connection is found or established, an `E_WARNING` level warning is generated.

### Return Values

Returns the MySQL protocol on success, or `FALSE` on failure.

### Examples

Example#1 mysql_get_proto_info() example

`<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
printf("MySQL protocol version: %s\n", mysql_get_proto_info());
?>`

The above example will output something similar to:

    MySQL protocol version: 10

### See Also

- mysql_get_client_info()
- mysql_get_host_info()
- mysql_get_server_info()