02-20-2008, 03:46 PM
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#1 (permalink)
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The Contributor
Join Date: Sep 2007
Posts: 89
Thanks: 1
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Email form - validates email by checking a/mx records of domain.
This might be handy for you guys, you can use it in whatever way you want, however, do not remove copyright notice in comments in php. And do now claim as own work!
Now, to the code. Enjoy!!
The form.html - you can rename this to whatever you want:
HTML Code:
<html>
<head>
<title>Form</title>
</head>
<body>
<form action="form.php" method="post">
<p><label>Name: <input type="text" name="name_field" /></label></p>
<p><label>Email: <input type="text" name="email_field" /></label></p>
<p><label>Message: <textarea name="message_field"></textarea></label></p>
<p><input type="submit" value="Send" /></p>
</form>
</body>
</html>
The form.php:
PHP Code:
<?php
// include config.php & email.php
require_once('config.php');
require_once('email.php');
/*
@className: Validation
@classPurpose: Validate User Input
@classDate: 25.11.2007
@classCopyright: DutchBrit.com
@classExtras: none
*/
class Validation {
const
VALID_NAME = '#^[\w\s]{3,}$#i', // NAME RegExp pattern
VALID_EMAIL = '^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)+$'; // EMAIL RegExp pattern
private
$name_field = '', // The name of the field used in your html document (name="xxx")
$email_field = '', // the same as above
$message_field = ''; // the same as above
private $config = null; // Config Class Instance
private $errors = false; // Errors Flag
private $email = null,
$thanks_email = null; // Email Class Instance
public function __construct($name, $email, $message)
{
$this->name_field = $name;//$_POST[$name];
$this->email_field = $email;//$_POST[$email];
$this->message_field = $message;//$_POST[$message];
$this->config = Config::getInstance();
}
/*
@purpose: Validate Name
*/
private function validate_name()
{
//... check if 'name' field is empty (quick mode) and throw error
if( !isset($this->name_field{0}) )
{
$this->throwError($this->config->invalid_name);
}
// check if the name contain invalid characters and length
elseif( !preg_match(self::VALID_NAME, $this->name_field) )
{
$this->throwError($this->config->invalid_name);
}
}
/*
@purpose: Validate email address
*/
private function validate_email()
{
//... check if 'email' field is empty
if( !isset($this->email_field{0}) )
{
$this->throwError($this->config->invalid_email_address);
}
// check for invalid characters
elseif( !eregi(self::VALID_EMAIL, $this->email_field) )
{
$this->throwError($this->config->invalid_email_address);
}
// check for A or MX record...
else
{
// split the email into name @ domain
$domain = split('@', $this->email_field);
// if not A or MX record were found, at least try to reach the domain
if( !@fsockopen($domain[1], 80, $errno, $errstr, 30) )
{
// validate A or MX record. NOTE: checkdnsrr() is not available on Windows!
if( !(checkdnsrr($domain[1],"MX") || checkdnsrr($domain[1], "A")) )
{
$this->throwError($this->config->invalid_email_record);
}
}
}
}
/*
@purpose: Validate Message
*/
private function validate_message()
{
//... check if 'message' field is empty
if( !isset($this->message_field{0}) )
{
$this->throwError($this->config->invalid_message);
}
// strip all tags but tags in $allowed_tags
else
{
$this->message_field = strip_tags($this->message_field, $this->config->allowed_tags);
}
}
/*
@purpose: Throw/Display Error Message
*/
private function throwError($errstr, $errno = 0)
{
throw new Exception($errstr, $errno);
$this->errors = true;
}
/*
@purpose: Run validation and send email
*/
public function validate()
{
echo 'validating...';
$this->validate_name();
$this->validate_email();
$this->validate_message();
if( !$this->errors )
{
// Initialize Instance of Email class.
$this->email = new Email($this->email_field, $this->name_field, $this->message_field,
$this->config->to_email, $this->config->to_subject);
//... send email.
if( $this->email->send() )
{
print('Success!');
}
else
{
$this->throwError($this->config->send_email_failed);
}
// Initialize new Instance of Email class to send 'Thank you!' message.
$this->thanks_email = new Email($this->config->to_email, $this->config->to_email,
$this->config->thank_you_msg, $this->email_field, $this->config->thank_you_subject);
$this->thanks_email->send();
}
}
};
try {
$form = new Validation($_POST['name'], $_POST['email'], $_POST['message']);
$form->validate();
} catch( Exception $e ) {
echo $e->getMessage();
}
?>
The email.php:
PHP Code:
<?php
/*
@className: Config
@classPurpose: Setting up the configuration
@classDate: 25.11.2007
@classCopyright: DutchBrit.com
@classExtras: Singleton (Allow Only One instance of this class)
*/
class Email {
private
$email_to = '', // email to send to
$email_subject = '', // subject
$email_message = '', // message
$email_from = '', // from email address
$email_name = ''; // from email name
private $headers = array();
public function __construct($from_email, $from_name, $email_message, $to_email, $email_subject)
{
// set up all necessary settings
$this->email_from = $from_email;
$this->email_name = $from_name;
$this->email_message = $email_message;
$this->email_subject = $email_subject;
$this->email_to = $to_email;
// set up headers
$this->headers[] = "MIME-Version: 1.0\r\n";
$this->headers[] = "Content-type: text/html; charset=utf-8\r\n";
$this->headers[] = "From: ".$this->email_from." <".$this->email_name.">\r\n";
$this->headers[] = "Reply-To: ".$this->email_from."\r\n";
$this->headers[] = "X-Mailer: PHP/" .phpversion();
}
public function send()
{
//...sending...
$headers_string = implode($this->headers, '');
return mail($this->email_to, $this->email_subject, $this->email_message, $headers_string);
}
};
?>
The config.php:
PHP Code:
<?php
/*
@className: Config
@classPurpose: Setting up the configuration
@classDate: 25.11.2007
@classCopyright: DutchBrit.com
@classExtras: Singleton (Allow Only One instance of this class)
*/
class Config {
static private $instance = null;
public
$to_email ='sam.granger@gmail.com', // email address where the email will be send
$to_subject = 'OOP Form Test', // default email subject
$thank_you_msg = 'Thank you!', // thank you message
$invalid_email_record = 'Your email do not have a valid A or MX record.', // invalid A, MX record, fake email.
$invalid_email_address = 'Your email contacin invalid characters.', // invalid email address (incorrect characters)
$invalid_name = 'Your name is invalid.', // invalid name (incorrect characters)
$invalid_message = 'Your message is invalid.', // invalid message (incorrect characters)
$send_email_failed = 'We were unable to send your message.', // Failed to send...email
$send_email_success = 'Your message were send', // Email was send successful message
$allowed_tags = '<a>,<p>'; // allowed tags, separated by comma
private function __construct()
{
}
static public function getInstance()
{
if(self::$instance == null)
{
self::$instance = new Config();
}
return self::$instance;
}
};
?>
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