Click here to Skip to main content
13,045,657 members (67,226 online)
Rate this:
Please Sign up or sign in to vote.
See more:
My code below id incrementing the id vlaue by 1 of the existing max value e.g. A00001 and echo new value as A00002, but the else condition is not working
Need help... Thanks.

//connect to database
include ('');

$result=mysql_query("Select max(aid) as lastaid from assets";);
if (false !== $row = mysql_fetch_assoc($result)) {
        $max_id = $row["lastaid"];
        $new_id = $max_id;

    $max_id = "A00001";
    echo "$max_id";
Posted 30-Aug-12 2:29am
Updated 30-Aug-12 20:22pm

1 solution

Rate this: bad
Please Sign up or sign in to vote.

Solution 1

You are a victim of operator precedence. The comparison operator !== (and the other comparison operators) have higher precedence than assignment. That means that
false !== $row = mysql_fetch_assoc($result)
strictly parses as
(false !== $row) = mysql_fetch_assoc($result)
which probably isn't what you mean.
if (!$row = mysql_fetch_assoc($result))
behaves as you would expect, even though it is a "violation" of the precedence list.

Fun, isn't it? ;P


This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
Top Experts
Last 24hrsThis month

Advertise | Privacy | Mobile
Web02 | 2.8.170713.1 | Last Updated 31 Aug 2012
Copyright © CodeProject, 1999-2017
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100