Unless $part_number is a number, you're going to want to put quotes
around it. Well, actually, you want to run mysql_real_escape_string()
on it.

You also don't seem to have an end to that if statement. Usually,
people use curly braces around those:

if(true) {
  //do something

----- Original Message -----
From: Chip Wiegand <[EMAIL PROTECTED]>
Date: Thu, 12 Aug 2004 13:24:05 -0700
Subject: Re: [PHP-DB] How to do an update with arithmetic from a user input

Justin Patrin <[EMAIL PROTECTED]> wrote on 08/12/2004 12:55:24 PM:
 > On Thu, 12 Aug 2004 12:46:19 -0700, Chip Wiegand
 > <[EMAIL PROTECTED]> wrote:
 > > I have an existing database and web page showing the query results. I have
 > > added another field to allow a user to input a two digit number. I want
 > > that number to change the number in one of the existing columns for the
 > > item it was input next to.
 > > I have these columns -
 > > 
 > > Part Number     Description     Quantity        List Price      Put on
 > > hold
 > > 
 > > I want the Quantity column changed according to the number the user input
 > > in the Put on hold column.
 > > I'm stuck in the query to write, trying to do
 > > 
 > > $sql1 = "update refurbs set qty(qty - $qty) order by 'description'";
 > Perhaps:
 > $sql1 = "update refurbs set qty = qty - $qty";
 > Also,
 > 1) you have no WHERE there, so this will update *all* records.
 > 2) why are you trying to order an update??
Thanks for the quick reply. The order by stuff is gone now, it was an
'artifact'. hehe. Anyway, I added the where clause so my query looks
like this:
$sql = "update refurbs set qty = qty - $buy where part_number = $part_number"; 
But when I try to run this I get an error - 
Parse error: parse error, unexpected $ in
/usr/local/www/data-dist/auth_dealers/refurbs-test.php on line 102
I don't see an rogue $'s in the code. 
(Eventually the form will submit to another page which will email the
info to a person here in our office).
Now the code looks like this - 
 <form action="<? PHP_SELF ?>" method="post" name="refurbs"> 
<table summary="" border="1" cellpadding="5" cellspacing="0" 
width="90%" align="center"> 
<td class="small" bgcolor="#ffffff">Part Number</td> 
<td class="small" bgcolor="#ffffff">Description</td> 
<td class="small" bgcolor="#ffffff">Quantity</td> 
<td class="small" bgcolor="#ffffff">List Price</td> 
<td class="small" bgcolor="#ffffff">Special Price</td> 
<td class="small" bgcolor="#ffffff">Put on Hold 
if (isset($submit)): 
$sql = "update refurbs set qty = qty - $buy where part_number = $part_number"; 
$result = mysql_query($sql); 
$Colors = array('#ffcc99','#ffcc33'); 
$I = 0; 
while ( $row = mysql_fetch_array($result)) 
printf("<tr bgcolor=" . $Colors[ $I ++ % count( $Colors ) ] .
"><td>%s\n</td>\n", $row["part_number"]);
printf("<td>%s\n</td>\n", $row["description"]); 
printf("<td>%s\n</td>\n", $row["qty"]); 
printf("<td>%s\n</td>\n", $row["list"]); 
printf("<td>%s\n</td>\n", $row["special"]); 
printf("<td><input type=\"text\" name=\"buy\" size=\"2\"
maxlength=\"2\"> </td></tr>\n");
<table summary="" border="0" cellpadding="5" cellspacing="0" 
width="90%" align="center"> 
<td><br /><div align="center"><input type="submit" name="submit"
value="Submit" /></div></td>
</form> !DSPAM:411bcfbf286175080220868! 

DB_DataObject_FormBuilder - The database at your fingertips

paperCrane --Justin Patrin--

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