Combine two different select and update statements - php

Question

I have one select query and one update query and I want to combine both of them.
The select query is like:
select questionDesc from myTable
where
questionId >= (
select currentQuestionid from userTable
where userId='1'
)
and questionId <= (
select currentQuestionid+4 from userTable
where userId='1'
)
For user=1, this query tries to fetch all the question Descriptions from myTable whose questionId lies between currentQuestionid and currentQuestionid+4 (currentQuestionid is a column specific to a user in the userTable). I will later use this result in my front-end.
Now, I want to update the currentQuesionid to currentQuestionid+5. This could be achieved using:
UPDATE userTable SET currentQuesionid = currentQuestionid+5 WHERE userId ='1'
I want to achieve both these queries in one database hit so as to improve the performance.
Is there any way to combine the two. I am using WAMP and the code is written in php scripts.
Any help is appreciated.

Answer 1

I think I have found the answer.
For combining multiple queries together we can use mysqli_multi_query() function. It is available for MySQL server versions 4.1.3 and newer. It takes multiple queries as input parameter and performs them in one db hit.
for example:
//sql queries should be separated by semi-colons
$sql = "SELECT Lastname FROM Persons ORDER BY LastName;";
$sql .= "SELECT Country FROM Customers";
// Execute multi query
if (mysqli_multi_query($con,$sql))
{
do
{
// Store first result set
if ($result=mysqli_store_result($con)) {
// Fetch row one and one
while ($row=mysqli_fetch_row($result))
{
printf("%s\n",$row[0]);
}
// Free result set
mysqli_free_result($result);
}
}
while (mysqli_next_result($con));
}
Source: http://www.w3schools.com/php/func_mysqli_multi_query.asp