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Email validation


WebProgrammerNewb22
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Hey guys.. I'm completely done with my contact form data validation except I cannot seem to get one part.  For my email field I need to make sure that it is a valid email address and not just words.  Also, I would like to make the phone number specific length.  Any ideas on how to go about this? thanks guys!

<?php

ini_set('display_errors', '0');

//Define Variables.
$FirstName = $_GET['FirstNameTextBox'];
$LastName = $_GET['LastNameTextBox'];
$PhoneNumber = $_GET['PhoneNumberTextBox'];
$EmailAddress = $_GET['EmailAddressTextBox'];
$Address = $_GET['AddressTextBox'];
$City = $_GET['CityTextBox'];
$State = $_GET['StateDropDownBox'];
$Zip = $_GET['ZipTextBox'];
$error1='*Please enter a First Name<br>';
$error2='*Please enter a Last Name<br>';
$error3='*Please enter a Phone Number<br>';
$error4='*Please choose a state<br>';
$error5='*Please enter a valid email address<br>';
$day2 = mktime(0,0,0,date("m"),date("d")+2,date("Y"));
$day3 = mktime(0,0,0,date("m"),date("d")+3,date("Y"));
$day7 = mktime(0,0,0,date("m"),date("d")+7,date("Y"));

// Array to collect messages
$messages = array();

//Display errors.
if($FirstName=="") {$messages[] = $error1; }
if($LastName=="") {$messages[] = $error2; }
if($PhoneNumber=="") {$messages[] = $error3; }
if($State=="") {$messages[] = $error4; }
if($EmailAddress=="") {$messages[] = $error5; }

// Don't do this part unless we have no errors
if (empty($messages)) {

  //Display correct contact date.
  if($State == "NY")
  {
    $messages[] = "Hello $FirstName $LastName! Thank you for contacting me.  I will get back to you within 2 days, before " .date("d M Y", $day2); 
  } 
  if($State == "NJ")
  {
    $messages[] = "$Hello FirstName $LastName! Thank you for contacting me.  I will get back to you within 3 days, before " .date("d M Y", $day3); 
  } 
  if($State == "Other")
  {
    $messages[] = "$Hello FirstName $LastName! Thank you for contacting me.  I will get back to you within 1 week, before " .date("d M Y", $day7);  
  } 
} // END if empty($messages

echo implode('<BR>', $messages);
?>

<p>--<a href="Contact_Form.html" class="style2"><span class="style1">Go Back</span></a>--</p>
</body>

</html>

 

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For email addresses I would use

 

if ( filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) === false )
{
   $errors[] = 'The email address you have entered is not valid.';
}
else
{
   $email = $_POST['email'];
   // other stuff
}

filter_var

 

You may not even require regex for the phone number format, if you only wish to restrict the length use strlen and compare it's return value to the desired length.

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For email addresses I would use

 

if ( filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) === false )
{
   $errors[] = 'The email address you have entered is not valid.';
}
else
{
   $email = $_POST['email'];
   // other stuff
}

filter_var

 

You may not even require regex for the phone number format, if you only wish to restrict the length use strlen and compare it's return value to the desired length.

 

fancy! that's what i get for not keeping up-to-date on the newest PHP5 functions.

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<?php

ini_set('display_errors', '0');

//Define Variables.
$FirstName = $_GET['FirstNameTextBox'];
$LastName = $_GET['LastNameTextBox'];
$PhoneNumber = $_GET['PhoneNumberTextBox'];
$EmailAddress = $_GET['EmailAddressTextBox'];
$Address = $_GET['AddressTextBox'];
$City = $_GET['CityTextBox'];
$State = $_GET['StateDropDownBox'];
$Zip = $_GET['ZipTextBox'];
$error1='*Please enter a First Name<br>';
$error2='*Please enter a Last Name<br>';
$error3='*Please enter a Phone Number<br>';
$error4='*Please choose a state<br>';
$error5='*Please enter a valid email address<br>';
$day2 = mktime(0,0,0,date("m"),date("d")+2,date("Y"));
$day3 = mktime(0,0,0,date("m"),date("d")+3,date("Y"));
$day7 = mktime(0,0,0,date("m"),date("d")+7,date("Y"));

// Array to collect messages
$messages = array();

//Display errors.
if($FirstName=="") {$messages[] = $error1; }
if($LastName=="") {$messages[] = $error2; }
if($PhoneNumber=="") {$messages[] = $error3; }
if($State=="") {$messages[] = $error4; }
if($EmailAddress=="") {$messages[] = $error5; }

//validate email address
if ( filter_var($_POST['EmailAddress'], FILTER_VALIDATE_EMAIL) === false )
{
   $errors[] = 'The email address you have entered is not valid.';
}
else
{
   $email = $_POST['email'];

}

// Don't do this part unless we have no errors
if (empty($messages)) {

  //Display correct contact date.
  if($State == "NY")
  {
    $messages[] = "Hello $FirstName $LastName! Thank you for contacting me.  I will get back to you within 2 days, before " .date("d M Y", $day2); 
  } 
  if($State == "NJ")
  {
    $messages[] = "$Hello FirstName $LastName! Thank you for contacting me.  I will get back to you within 3 days, before " .date("d M Y", $day3); 
  } 
  if($State == "Other")
  {
    $messages[] = "$Hello FirstName $LastName! Thank you for contacting me.  I will get back to you within 1 week, before " .date("d M Y", $day7);  
  } 
} // END if empty($messages

echo implode('<BR>', $messages);
?>

<p>--<a href="Contact_Form.html" class="style2"><span class="style1">Go Back</span></a>--</p>
</body>

</html>

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<?php

ini_set('display_errors', '0');

//Define Variables.
$FirstName = $_GET['FirstNameTextBox'];
$LastName = $_GET['LastNameTextBox'];
$PhoneNumber = $_GET['PhoneNumberTextBox'];
$EmailAddress = $_GET['EmailAddressTextBox'];
$Address = $_GET['AddressTextBox'];
$City = $_GET['CityTextBox'];
$State = $_GET['StateDropDownBox'];
$Zip = $_GET['ZipTextBox'];
$error1='*Please enter a First Name<br>';
$error2='*Please enter a Last Name<br>';
$error3='*Please enter a Phone Number<br>';
$error4='*Please choose a state<br>';
$error5='*Please enter a valid email address<br>';
$day2 = mktime(0,0,0,date("m"),date("d")+2,date("Y"));
$day3 = mktime(0,0,0,date("m"),date("d")+3,date("Y"));
$day7 = mktime(0,0,0,date("m"),date("d")+7,date("Y"));

// Array to collect messages
$messages = array();

//Display errors.
if($FirstName=="") {$messages[] = $error1; }
if($LastName=="") {$messages[] = $error2; }
if($PhoneNumber=="") {$messages[] = $error3; }
if($State=="") {$messages[] = $error4; }
if ( filter_var($EmailAddress, FILTER_VALIDATE_EMAIL) === false ) { $messages[] = $error5; }

// Don't do this part unless we have no errors
if (empty($messages)) {

  //Display correct contact date.
  if($State == "NY")
  {
    $messages[] = "Hello $FirstName $LastName! Thank you for contacting me.  I will get back to you within 2 days, before " .date("d M Y", $day2); 
  } 
  if($State == "NJ")
  {
    $messages[] = "$Hello FirstName $LastName! Thank you for contacting me.  I will get back to you within 3 days, before " .date("d M Y", $day3); 
  } 
  if($State == "Other")
  {
    $messages[] = "$Hello FirstName $LastName! Thank you for contacting me.  I will get back to you within 1 week, before " .date("d M Y", $day7);  
  } 
} // END if empty($messages

echo implode('<BR>', $messages);
?>

<p>--<a href="Contact_Form.html" class="style2"><span class="style1">Go Back</span></a>--</p>
</body>

</html>

 

lol akitchin, got it in one.

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For phone number validation I just strip out all non-numeric characters and then test the length. But, depending upon "where" your users may be from this may not be a trivial task, e.g. international users.

 

But, for the sake of argument, let's say you expect all users to be from the US. I would first include text on the form to tell the user they must enter their full phone number, including the area code. Something such as:

 

Phone: ____________ (xxx) xxx-xxxx

 

Then, when processing the input, call a function such as this:

function validPhone($phone)
{
    $phone = preg_replace("/[^\d]/", '', $phone);
    return (strlen($phone)==10) ? $phone : false;
}

 

The function will return just the numeric digits (if only 10) or will return false, so you can perform whatever error handling is needed.

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