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May 18, 2013 at 5:55 pm #44869
LaurelBrittany
ParticipantI am trying to validate a form and I keep getting an error: Notice: Undefined variable: errorString in C:xampphtdocsintroducingphpemailrequired_fieldsindex.php on line 7
The form fields also fill with error text. The form works fine
<html>Check out this Pen!
<head>
<title>PHP Form Processing Example</title>
</head>
<body>
<?php echo $errorString; ?>
<form action="process.php" method="POST">
Name:*<br /><input type="text" name="Name" value="<?php echo $Name; ?>" /><br /><br />
Email:*<br /><input type="text" name="Email" value="<?php echo $Email; ?>" /><br /><br />
URL:*<br /><input type="text" name="URL" value="<?php echo $URL; ?>" /><br /><br />
Company:<br /><input type="text" name="Company" value="<?php echo $Company; ?>" /><br /><br />
<input type="submit" name="submit" value="Submit Form" />
</form>
</body>
</html>This is the process.php
<?phpCheck out this Pen!
/*
* Specify the field names that are in the form. This is meant
* for security so that someone can't send whatever they want
* to the form.
*/
$allowedFields = array(
'Name',
'Email',
'URL',
'Company',
);
// Specify the field names that you want to require...
$requiredFields = array(
'Name',
'Email',
'URL',
);
$errors = array();
foreach($_POST AS $key => $value)
{
// first need to make sure this is an allowed field
if(in_array($key, $allowedFields))
{
$$key = $value;
// is this a required field?
if(in_array($key, $requiredFields) && $value == '')
{
$errors[] = "The field $key is required.";
}
}
}
// were there any errors?
if(count($errors) > 0)
{
$errorString = '<p>There was an error processing the form.</p>';
$errorString .= '<ul>';
foreach($errors as $error)
{
$errorString .= "<li>$error</li>";
}
$errorString .= '</ul>';
// display the previous form
include 'index.php';
}
else
{
// At this point you can send out an email or do whatever you want
// with the data...
// each allowed form field name is now a php variable that you can access
// display the thank you page
header("Location: thanks.html");
}
May 18, 2013 at 6:19 pm #135569unasAquila
Participantyou need to check if the variable is initialize i.e
if(!isset $errorString){
//stuff to do if $errorString is not set
}else{
echo $errorString;
}As for the form fields add something like
!empty($Name) ? echo $Name : echo ”;
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