Clearing a FORM if new ID

[digit]

I have a save.php page that will accept an $id from an edit.php form and change the information for the current record. If the $id is not passed the save.php is supposed to create a new record with a new unique $id.

I am able to get the information to save correctly but everytime I pass no $id variable to my edit.php?id= page all of the fields in the form are filled with error HTML like:

<br /><b>Notice</b>: Undefined variable: id_name in <b>/var/www/html/edit.php</b> on line <b>96</b><br />

I can clear out the HTML errors and replace it with good info and it will save correctly.

I'm know it's supposed to do this, I just need help figuring out how to automatically clear the form so all the HTML errors are not displayed.

Any help would be great!

Digit

[witha_ph]

OK, my interpretation of what you've written suggests

I would

// assume your POSTing
if(isset($_POST['id'])) {
    // blah - get data whatever from database
}
else {  
   // id is not set therefore clear form
} 

[digit]

You are correct, however I am new to php and I'm not sure how to clear the form if the id is not set:

else {
// id is not set therefore clear form
}[/PHP]

Can anyone recommend a good book or website?

Digit

[witha_ph]

Haha.. ok - to be honest when I'm stuck with PHP I hit google and just search for what I want help with, as there a MANY MANY MANY php resources. This site infact is a good one.

Can you show your edit.php page as there are many ways this could be done, depending on what you've done!

[Snortles]

I would simply say initialize your variables.

If you use $id_name to add a name to a field, near the top of the script somewhere, you should have $id_name = '';

That way if nothing is pulled from the database, $id_name will be defined as an empty string. The input box on the form will be set to an empty string and you won't get any errors.

[duckax]

Actually on most servers, those error messages should be disabled so your code should work fine. However, this is not the best way to code :P

I think you are doing something like

<input type="text" value="<? print $_POST['id']; ?>">

Change it to

<input type="text" value="<? if(isset($_POST['id'])) print $_POST['id']; ?>">

[digit]

Change it to

<input type="text" value="<? if(isset($_POST['id'])) print $_POST['id']; ?>">

Thanks for the tip, it worked great!

Digit