MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysqli::$protocol_version
mysqli_get_proto_info
Returns the version of the MySQL protocol used
Object oriented style
string mysqli->protocol_version ;Procedural style
int mysqli_get_proto_info(mysqli link);
Returns an integer representing the MySQL protocol version used
by the connection represented by the link
parameter.
link
Procedural style only: A link identifier returned by
mysqli_connect
or
mysqli_init
Returns an integer representing the protocol version.
Example 3.50 $mysqli->protocol_version example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* print protocol version */
printf("Protocol version: %d\n", $mysqli->protocol_version);
/* close connection */
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* print protocol version */
printf("Protocol version: %d\n", mysqli_get_proto_info($link));
/* close connection */
mysqli_close($link);
?>
The above examples will output:
Protocol version: 10
mysqli_get_host_info
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