Re-draw a form with user's input.

[Jay]

Hi everybody!

Please help me with this problem. I try to write code for server side
data validation. Initially, I have a html file called "form.html" which
just contains all the necessary fields for user to submit their contact
info (name, phone, email, address.....etc...). All user's input will be
sent to "processForm.php" using POST. In processForm.php, I want to be
able to re-display the form in "form.html" with valid user's input and
error message on top of the form in case user enter invalid data.
Currently, a simple code that I could think of is the following:

<?php

if (!empty($_POST['submit']))
{
$isAllValid = false;
//Check for invalid data
//Code for checking data will be written here.

//Invalid data occur.
if(!$isAllValid)
{
include("form.html");

//set user's input in the form's fields. How to access
//form's field form here ?
}
}
else
{
echo "User not submit";
}

?>
My questions are:

1. Is there a way to access the form's fields in "form.html" to set
their values ? (given all the form's fields in form.html have unique
name)

2. If (1) is not doable, then how would I this in PHP ?

Thank you in advance !!

Jay Hana

[larry]

roll the form in with the validation

check for $_POST
- (process form data/validate, etc)
- (if valid add to DB, use HEADER to exit)
check for $_GET
- (create default/blank data or read in data from database)
HTML headings
HTML
- HTML form with PHP 'echo()' statements to put in data from above and
validation clues)

It is a bit more complex, but that is the basics of how to organize the
file.

larry

[Jay]

Dear Larry,

It's me again. Thanks for your quick response, but I am still stuck.

- (create default/blank data or read in data from database)
HTML headings
HTML
I don't want to add data to Database unless all data are valid.
- HTML form with PHP 'echo()' statements to put in data from above and
validation clues)

I don't want to re-write the HTML code for the form. That's why I use
include("form.html") in the processForm.php.

I think you misunderstood my question. I try to access form's field
within processForm.php page. For example,

Using document.getElementByID('element') to set the values of the
form's fields. May I do that ?

Thanks again,

Jay Hana

[Jerry Stuckle]

Jay wrote:

I don't want to add data to Database unless all data are valid.
That's standard.

- HTML form with PHP 'echo()' statements to put in data from above and
validation clues)

I don't want to re-write the HTML code for the form. That's why I use
include("form.html") in the processForm.php.

Then include the echo statements in the form itself. Just ensure the variables
are set to an empty string ('');

I think you misunderstood my question. I try to access form's field
within processForm.php page. For example,

Using document.getElementByID('element') to set the values of the
form's fields. May I do that ?

No you can't. PHP knows nothing about the HTML. Larry's response was correct
and accurate.
Thanks again,

Jay Hana

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
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[Kimmo Laine]

"Jay" <go*******@gmail.com> kirjoitti
viestissä:11**********************@g14g2000cwa.goo glegroups.com...

Hi everybody!

Please help me with this problem. I try to write code for server side
data validation. Initially, I have a html file called "form.html" which
just contains all the necessary fields for user to submit their contact
info (name, phone, email, address.....etc...). All user's input will be
sent to "processForm.php" using POST. In processForm.php, I want to be
able to re-display the form in "form.html" with valid user's input and
error message on top of the form in case user enter invalid data.
Currently, a simple code that I could think of is the following:

<?php

if (!empty($_POST['submit']))
{
$isAllValid = false;
//Check for invalid data
//Code for checking data will be written here.

//Invalid data occur.
if(!$isAllValid)
{
include("form.html");

//set user's input in the form's fields. How to access
//form's field form here ?
}
}
else
{
echo "User not submit";
}

?>
My questions are:

1. Is there a way to access the form's fields in "form.html" to set
their values ? (given all the form's fields in form.html have unique
name)

2. If (1) is not doable, then how would I this in PHP ?

Simply set the value attribute of each field.

<input type="text" name="foo" value="<?= $_GET['foo'] ?>">

I'd say it works even though the file is called form.html, since you are
including the page, not passing it thru. In that case php tags should be
executed...

--
"I am pro death penalty. That way people learn
their lesson for the next time." -- Britney Spears

et****************@5P4Mgmail.com

[SAndrejev]

I'm new to web programming but i think that you can make a function,
somthing like print_content($error) which will be printed if you open
the page for the first time or if validation didn't pass(then you will
probably would like to pass #error variable)

[Manuel Lemos]

Hello,

on 07/03/2005 03:23 PM SA*******@gmail.com said the following:

I'm new to web programming but i think that you can make a function,
somthing like print_content($error) which will be printed if you open
the page for the first time or if validation didn't pass(then you will
probably would like to pass #error variable)

That is the way this forms validation and generation works. You post the
form to the same page where it is presented. If it was submitted the
class can validate the form values. If there is an invalid field, the
form may be presented again with information about the invalid fields.

http://www.phpclasses.org/formsgeneration
--

Regards,
Manuel Lemos

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