Menu
Community /Pin to ProfileBookmark
@NogDogNov 24.2008 — #Another option is to have the form display and the form validation/execution all run through the same controller script. In this way the user-submitted values can be retained if there is an error. At a somewhat simplified level:
Then in form_page.php you can populate fields from the post data if it exists, plus output any errors if they exist:
form_page.php:
@NogDogNov 24.2008 — #I've recently taken to using the CodeIgniter framework and making use of its Form_validation class . ?
Form validation without refresh
Right now, I have a HTML form… it inserts text boxes into a MySQL database after clicking a button which executes a seperate php file to do these inserts for the form “action.” I want to make sure that some of the required text box fields are not empty before it proceeds to execute the script. I can’t have php echo or alert because I do not want the user losing all of the info he typed in because he forgot a required field. (because of the refresh) // is there anyway to do something like this:
form action=”foo();”
javascript…
foo() {
// check that text boxes arent empty
// if they arent… execute php insert script
}
Sign in
to post a comment4 Comments(s) ↴
0
@NogDogNov 24.2008 — #Another option is to have the form display and the form validation/execution all run through the same controller script. In this way the user-submitted values can be retained if there is an error. At a somewhat simplified level:[code=php]
<?php
if(isset($_POST['some_field'])) // form was submitted
{
$errors = array();
require_once 'validation_script.php';
if(form_is_valid()) // function in the required script; populates $errors on error
{
require_once 'processing_script.php';
if(process_form() == true) // function in the required script
{
include "success_page.php";
exit; // all done here
}
else
{
$errors[] = ("Sorry, the system was not able to process your request.");
}
}
}
// display the form:
require 'form_page.php';
[/code]Then in form_page.php you can populate fields from the post data if it exists, plus output any errors if they exist:
form_page.php:
[code=php]
<html><head><title>Example</title></head><body>
<?php
if(!empty($errors))
{
foreach($errors as $err)
{
echo "<p class='error'>$err</p>n";
}
}
?>
<form action="" method="post">
<p>Example: <input type="text" name="example" value="<?php
if(isset($_POST['example']))
{
echo htmlspecialchars($_POST['example'], ENT_QUOTES);
}
?>" /></p>
<p><input type="submit" value="Submit" />
</form>
</body></html>
[/code]0
@NogDogNov 24.2008 — #I've recently taken to using the