check mysql server version

mysqlversion

<?php
$link = mysql_connect("host", "db", "pw");
if (!$link) die('Could not connect: ' . mysql_error());
$sql = 'SHOW VARIABLES LIKE "%version%"';
$result = mysql_query($sql,$link);
print "MySQL server version: " . mysql_get_server_info();
while($row = mysql_fetch_assoc($result)){
    foreach($row as $cname => $cvalue){
        print "$cname: $cvalue\t";
    }
    print "\r\n";
}
mysql_close($link);