Easiest way for PHP email verification link

The easiest way is not to register unverified users at all.

Ask them for an email address and send email with a link that contains this address sealed with a hash. Upon receiving this link you can start the registration process.

Something like this

$secret = "35onoi2=-7#%g03kl";$email = urlencode($_POST['email']);$hash = MD5($_POST['email'].$secret);$link = "http://example.com/register.php?email=$email&hash=$hash";

And in your register.php add 2 hidden fields to the registration form - email and hash, storing their received values from GET.

Finally, process registration and check,

if (md5($_POST['email'].$secret) == $_POST['hash']) {    //Continue registration.}

Easiest for whom - user, coder, computer?What are you optimizing - the quantity of keypresses, the size of the code, the user experience?

The easiest to code is probably unsafe.You should check the email address for correctness before sending a letter to it.

after registration create a hashed string and save it to the temporary user table send that hashed string to the user email address using this code

if(isset($_POST['register'])){$email_id=$_POST['email'];$pass=$_POST['password'];$code=substr(md5(mt_rand()),0,15);mysql_connect('localhost','root','');mysql_select_db('sample');$insert=mysql_query("insert into verify values('','$email','$pass','$code')");$db_id=mysql_insert_id();$message = "Your Activation Code is ".$code."";$to=$email;$subject="Activation Code For Talkerscode.com";$from = 'your email';$body='Your Activation Code is '.$code.' Please Click On This link <a href="verification.php">Verify.php?id='.$db_id.'&code='.$code.'</a>to activate your account.';$headers = "From:".$from;mail($to,$subject,$body,$headers);echo "An Activation Code Is Sent To You Check You Emails";} 

and after that create a verify page and then

if(isset($_GET['id']) && isset($_GET['code'])){$id=$_GET['id'];$code=$_GET['id'];mysql_connect('localhost','root','');mysql_select_db('sample');$select=mysql_query("select email,password from verify where id='$id' and code='$code'");if(mysql_num_rows($select)==1){    while($row=mysql_fetch_array($select))    {        $email=$row['email'];        $password=$row['password'];    }    $insert_user=mysql_query("insert into verified_user values('','$email','$password')");    $delete=mysql_query("delete from verify where id='$id' and code='$code'"); }}

if you have any problem here is a complete tutorial http://talkerscode.com/webtricks/account-verification-system-through-email-using-php.php