(PHP 5, PHP 7, PHP 8)
mysqli::$protocol_version -- mysqli_get_proto_info — Returns the version of the MySQL protocol used
Object-oriented style
Procedural style
Returns an integer representing the MySQL protocol version used by the
connection represented by the mysql parameter.
mysqlProcedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()
Returns an integer representing the protocol version.
Example #1 $mysqli->protocol_version example
Object-oriented style
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password");
/* print protocol version */
printf("Protocol version: %d\n", $mysqli->protocol_version);Procedural style
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password");
/* print protocol version */
printf("Protocol version: %d\n", mysqli_get_proto_info($link));The above examples will output:
Protocol version: 10