Doing this is very simple, although a pain in the rear...
For those of you that have any confusion on this issue, pay very close
attention to this script. It effectivly demonstrates how to deal with a
form, and display intellegent errors WITHOUT any of that "...Please click
your browsers back button..." crap.
Have a hidden field in your form - ACTION=SAVE
This will tell your script when to look for input.
Write your script like this
****************************************************
<?
//Make sure your ID is of int type.
//If ID > 0 then you are in UPDATE mode. if ID == 0 then you are in INSERT
MODE
$ID = intval($ID);
//The main reason that I use a switch instead of an IF is that you can
break out at any time.
switch($ACTION) case 'SAVE':
{
//Validate all fields here
if(empty($field1)) $oErr->field1 = 'Required';
if(empty($field2)) $oErr->field2 = 'Required';
//If the variable $oErr is set, then break
if(isset($oErr)) break;
//We are okay, add slashes to all fields...
$field1 = addslashes($field1);
$field2 = addslashes($field2);
if($ID)
{ //UPDATE MODE
$sQuery = "UPDATE table SET field1='field1',
field2='field2 WHERE id=$ID";
//Do the UPDATE query here (however you do that)
}
else
{ //INSERT MODE
$sQuery = "INSERT INTO table VALUES ('field1', 'field2');
//Do the INSERT query here (however you do that)
//Grab the newly inserted ID
$ID = mysql_insery_id();
}
//We have success, Do the redirect here
header("Location: http://www.yourdomain.com/nextscript.php?ID=$ID";);
exit;
}
?>
<html>
<body>
<form name="frmInput" action="<?= $PHP_SELF ?>" method="post">
<input type="hidden" name="ACTION" value="SAVE">
<input type="hidden" name="ID" value="<?= $ID ?>">
Field 1: <? if(isset($oErr->field1)) echo($oErr->field1); ?><br>
<input type="text" name="field1" value="<?= addslashes($field1) ?>">
Field 2: <? if(isset($oErr->field2)) echo($oErr->field2); ?><br>
<input type="text" name="field2" value="<?= addslashes($field2) ?>">
</form>
</body>
</html>
******************************************************
At 06:24 PM 11/25/2001 +0100, Daniel Alsén wrote:
> > 2. User fills in a form, clicks "submit" which calls the same script,
> > passing itself the values. Depending on the value passed by the submit
> > button, the script processes the information (INSERT or UPDATE) and sets
> > $done = 1 if successful.
> >
> > The second scenario is easier to handle.
> > Call the same script, passing it $done, and depending on whether or not
> > $done is set you redirect.
> >
> > Juli Meloni has done an excellent tutorial on just this at
> > http://www.thickbook.com. look in the tutorials for something like "Form
> > With Error Message". You just have to adapt the logic to suit your needs.
>
>The second scenario is correct. I am actually already using the method in
>Melonis tutorial for error messages. But i can´t do a redirection that way
>since $done isn´t set until after the db INSERT. My if-statement for the
>header is at the top of the page (wich is the only place i can put it) and
>will never know if $done is set or not below.
>
>- Daniel
>
>
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