PHP form Validation

[john0611]

Hi all,

I have a problem i've been tryin to workout?

Here is the syntax:

    <?php

// process the email
if (array_key_exists('submit', $_POST)) {
  ini_set("sendmail_from", "info@test.com");
  $to = 'info@test.com'; // use your own email address
  $subject = 'Feedback from website';
  
  // list expected fields
  $expected = array('name', 'email', 'tel', 'from', 'dep');
  // set required fields
  $required = array('name', 'email', 'tel');
  // create empty array for any missing fields
  $missing = array();
  
  // process the $_POST variables
  foreach ($_POST as $key => $value) {
    // assign to temporary variable and strip whitespace if not an array
    $temp = is_array($value) ? $value : trim($value);
    // if empty and required, add to $missing array
    if (empty($temp) && in_array($key, $required)) {
      array_push($missing, $key);
      }
    // otherwise, assign to a variable of the same name as $key
    elseif (in_array($key, $expected)) {
      ${$key} = $temp;
      }
    }
 
  // go ahead only if all required fields OK
  if (empty($missing)) {
    // build the message
    $message = "Name: $name\n\n";
    $message .= "Email: $email\n\n";
    $message .= "Contact No.: $tel\n\n";
    $message .= "Arrive: $from\n\n";
    $message .= "Depart: $dep\n\n";


    // limit line length to 70 characters
    //$message = wordwrap($message, 70);
  
    // send it  
    $sendmail_from = mail($to, $subject, $message);
    if ($sendmail_from) {
      // $missing is no longer needed if the email is sent, so unset it
      unset($missing);
      }
    }
  }
?>
    <?php
        if ($_POST && isset($missing)) {
?>
    <p class="main_warning">Please complete the missing item(s) indicated. Your message has not been sent.</p>
    <?php
          }
        elseif ($_POST && !$sendmail_from) {
?>
    <p class="main_warning">Sorry, there was a problem sending your message. Please try later.</p>
    <?php
          }
        elseif ($_POST && $sendmail_from) {
?>

// form begins

    <span class="confmsg"><strong>Thank you for your enquiry. We will contact you &amp; confirm your booking.</strong></span>
    <?php } ?>
    <form id="topnavform" name="topnavform" method="post" action="">
      <label id="cal"><abbr title="Enter the date when you will be arriving">From:</abbr>
        <input type="text" name="from" id="from" maxlength="10" />
        <a href="javascript:showCal('Calendar1')"><img src="img/calimg.jpg" width="17" height="17" alt="Calendar" title="Calendar" /></a></label>
      <?php
    if (isset($missing) && in_array('name', $missing)) { ?>
      <span class="warning">Enter your name.</span>
      <?php } ?>
      <label><abbr title="Enter your name."><font color="#FF0000">*</font>Name:</abbr>
        <input type="text" name="name" id="name" maxlength="35" />
      </label>
      <label id="calb"><abbr title="Select the date when you will be departing.">To:</abbr>
        <input type="text" name="dep" id="to" maxlength="10" />
        <img src="img/calimg.jpg" width="17" height="17" alt="Calendar" title="Calendar" /> </label>
      <?php
    if (isset($missing) && in_array('email', $missing)) { ?>
      <span class="warning">Enter your email address.</span>
      <?php } ?>
      <label><abbr title="Enter your email address."><font color="#FF0000">*</font>Email:</abbr>
        <input type="text" name="email" id="email" maxlength="40"/>
      </label>
      <?php
    if (isset($missing) && in_array('tel', $missing)) { ?>
      <span class="warning">Enter your contact no.</span>
      <?php } ?>
      <label><abbr title="Enter your contact no."><font color="#FF0000">*</font>Tel:</abbr>
        <input type="text" name="tel" id="tel" maxlength="25" />

        <input type="submit" name="submit" id="submit" class="submit" value="Send" title="Send" />
        <input type="reset" name="reset" id="reset" class="reset" value="Reset" title="Reset" />
      </label>
    </form>
  </div>

All working fine, but I'm trying to add a validation in the email field (@ must be present in the filed), so that visitors cannot enter bogus emails.

You help and suggestions are much appreciated, thank you

[forum_amnesiac]

This is one way to validate the email address:-

if(!eregi("^[_&a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+
(.[a-z0-9-]+)*(.[a-z]{2,4})$", $email)) {

echo 'Invalid format of email address';

} 

Replace '$email' with the field name you are using, if it fails then return to the "Enter Email Address" input.

However, this a request that has been made many times on this forum so a search should turn up many other examples for you.