<?php 
	$con = mysql_connect("localhost", "root", "root");
		if (!$con) {
			die('Could not connect: ' . mysql_error());
		}

		mysql_select_db("sfcommunity", $con);
		
		$query = 'SELECT COUNT(*) FROM `jos_users_info`';
		$result = mysql_query($query) or die('Sorry we could not count the number of users: ' . mysql_error());
		$numberofusers = mysql_result($result, 0);
		mysql_close($con);
 	echo "$numberofusers";
?>

Counting entries in database table

PHP