php filter validate email

Question

trying to do validation for email using filter_validate_email. and use meth post. however, I get an error that

Notice: Undefined index: email in H:\XAMPP\htdocs\PHP-Walkthrough-Completed\register.php on line 68

E-mail is not valid

<input type="text" class="form-control" id="email" name="email" required placeholder="Type your email"><span id="emailError"></span>
<?php
  if(!filter_var($email, FILTER_VALIDATE_EMAIL))
  {
     echo("E-mail is not valid");
  }
  else
  {
     echo("E-mail is valid");
  }     
?>

How you're getting $email it is obviously not defined anywhere. — Saad Suri
– Saad Suri, Commented Mar 29, 2019 at 5:10
Why not use type="email" in the input? That way you get a first filter of the input — Francis G
– Francis G, Commented Mar 29, 2019 at 5:40
assign value or define $email like $email = $_POST["email"]; befor using filter_var($email, FILTER_VALIDATE_EMAIL) — Jatin Parmar
– Jatin Parmar, Commented Mar 29, 2019 at 6:04

Ashu · Accepted Answer · 2019-03-29 05:11:31Z

2

On same page you are posting data & checking posting data validation.To achieve this you have to ad post condition :

<?php
if(isset($_POST['email']))
{
  $email = $_POST['email'];
  if(!filter_var($email, FILTER_VALIDATE_EMAIL))
  {
     echo("E-mail is not valid");
  }
  else
  {
     echo("E-mail is valid");
  }     
}
?>

answered Mar 29, 2019 at 5:11

Ashu

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