(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.
mysql
Procedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()
Returns an integer representing the protocol version.
Example #1 $mysqli->protocol_version example
Object-oriented style
<?phpmysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);$mysqli = new mysqli("localhost", "my_user", "my_password");/* print protocol version */printf("Protocol version: %d\n", $mysqli->protocol_version);
Procedural style
<?phpmysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);$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