Click here to Skip to main content
Rate this: bad
good
Please Sign up or sign in to vote.
See more: PHP
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.
 
<?php
//connect to database
include ('config.inc');
 

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

    else
 
    {
    $max_id = "A00001";
    }
    echo "$max_id";
?>
Posted 30-Aug-12 3:29am
ramen79544
Edited 30-Aug-12 21:22pm
v2

1 solution

Rate this: bad
good
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.
However,
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? Poke tongue | ;-P
 
Peter
  Permalink  

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

  Print Answers RSS
0 OriginalGriff 319
1 Maciej Los 295
2 Sergey Alexandrovich Kryukov 230
3 CPallini 205
4 Sinisa Hajnal 166
0 OriginalGriff 7,760
1 Sergey Alexandrovich Kryukov 7,072
2 DamithSL 5,604
3 Manas Bhardwaj 4,986
4 Maciej Los 4,785


Advertise | Privacy | Mobile
Web02 | 2.8.1411023.1 | Last Updated 31 Aug 2012
Copyright © CodeProject, 1999-2014
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