How do I find the number of rows in a result set?

If is often useful to know how many rows are returned, and particularly when there may be no rows returned so that you can deal with that accordingly and tell the user to widen their search or try a different search, perhaps.

Here's how it is done, using the mysql_num_rows function which does what it says on the tin.


<?php

$query = "SELECT friends FROM listoffriends WHERE name = 'me'";

$doquery = mysql_query($query);



$myfriendnumber = mysql_num_rows($doquery);//returns integer value



if(!$myfriendnumber) { echo "Sorry, the person 'me' doesn't have any friends"; }

else { echo "The person 'me' has $myfriendnumber friends!"; }

?>

Comment on this Question and Answer >>>

ASK A QUESTION

More mysql PHP Questions

Why will this statement not print a column with "lastname space firstname"? Print " .$info['businessname'] "; Print " .$info['firstname']. " " .$info['lastname'] "; I want to see 2 columns - a

how to write sessions in php code?

How do I return a random row from the database?

How do I order the results of my query?

Why does this code not work? Returns this error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND ClaimNo = AND UserName = john' at line 2