25)Design a HTML form to accept email
address from the user. Write a PHP function using regular expressions check for
the validity of entered email-id. The @ symbol should not appear more than
once. The dot (.) can appear at the most once before @ and at the most twice or
at least once after @ symbol. The substring before @ should not begin with a
digit or underscore or dot or @ or any other special character.
<form action='' method='POST'>
Email Address: <input type='text' name='email'>
<input type='submit' value='Submit'>
</form>
<?php
//$email = "someone@example.com";
$email=$_POST['email'];
//if(eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$",
$email))
if ( eregi('^[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+.([a-zA-Z]{2,4})$',$email))
{
echo "Valid email address.";
}
else
{
echo "INvalid email address.";
}
?>
