PHP form validation question?

Question

I have a form that validates the email address and I want to be able to place echo '<p class="error">Please enter a valid email address!</p>'; anywhere on the web page without having to put the validation process within the html?

Or should I include the validation process in the HTML form?

Here is the php code.

if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) {
    $email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email']));
} else {
    echo '<p class="error">Please enter a valid email address!</p>';
}

I don't have a clue what you are asking. You say want to echo {blah}, and you already do echo {blah}, so what do you need help with? — Amy B
– Amy B, Commented Mar 25, 2010 at 6:25
I want to be able to put <p class="error">Please enter a valid email address!</p> any where on the web page. — GeNx
– GeNx, Commented Mar 25, 2010 at 6:27

Your Common Sense · Accepted Answer · 2010-03-25 11:40:12Z

2

Slightly different

if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) { 
    $email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email'])); 
} else { 
    $error = 'Please enter a valid email address!'; 
}

Now you can print your $error anywhere on your page

Okay, make it this:

if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) { 
    $email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email'])); 
    echo "valid ";
} else { 
    $error = 'Please enter a valid email address!'; 
    echo "invalid ";
} 
echo $error;
exit;

What would it say now?

Another example:

<?php
$error="";
if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) { 
  $email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email'])); 
} else { 
  $error = 'Please enter a valid email address!'; 
  $email=htmlspecialchars($email);
} 
?>
<html>
<form>
<?php if ($error): ?>
  <p class="error"><?php echo $error?></p>
<?php endif ?>
Enter email: <input type="text" name="email" value="<?php echo $email?>">
<input type="submit">
</form>
</html>

Now it works?

edited Mar 25, 2010 at 11:40

answered Mar 25, 2010 at 6:27

Your Common Sense

158k42 gold badges226 silver badges373 bronze badges

Sign up to request clarification or add additional context in comments.

14 Comments

animuson Over a year ago

@GeNx: Then you just echo $error; wherever you want it to appear on your page. Did you do that?

GeNx Over a year ago

@animuson of course I did that I'm not that much of a newbie :) I actually tried that before I posted this question.

Your Common Sense Over a year ago

@GeNx may be you just entered valid email? or you trying to print it on some other page? or just before validation?

GeNx Over a year ago

@Col. Shrapnel, No I left out the @ sign so I know its not valid.

Your Common Sense Over a year ago

@GeNx never say "I know" but only "I have checked". Did you check what branch of your condition has worked? buy putting echo "valid"; and echo "invalid"; in the corresponding statements?

|

Collectives™ on Stack Overflow

PHP form validation question?

1 Answer 1

14 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

14 Comments

Your Answer

Sign up or log in

Post as a guest

Related