php - Activating user's accounts by mailing them -

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<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> <body> <?php  require_once('database_detail.php'); if(isset($_post['submit'])) {    $dbc=mysqli_connect(cname,chost,cpwd,cdb); $username=mysqli_real_escape_string($dbc,trim($_post['username'])); $password=mysqli_real_escape_string($dbc,trim($_post['password'])); $confirm=mysqli_real_escape_string($dbc,trim($_post['confirm'])); $email=mysqli_real_escape_string($dbc,trim($_post['email'])); $phone=mysqli_real_escape_string($dbc,trim($_post['phone']));     if(!empty($username) && !empty($password) && !empty($confirm) && !empty($email) &&        !empty($phone))     {                if($password==$confirm)             {                 $query="select * user      user_username='$username'";                 $data=mysqli_query($dbc,$query);                 if(mysqli_num_rows($data)== 0)                  {                     $random=rand(1000,10000);                     $query="insert     user(user_username,user_password,user_email,user_phone,date,random)".                         "values('$username',sha('$password'),'$email','$phone',now(),'$random')";                     mysqli_query($dbc,$query);                     $message="account created successfully, kindly     visit following link activate account"."\n"."localhost/login?    activation=".$random;                     $to=$email;                     $subject="account activation";                         mail($to,$subject,$message,'from:'.'xyz@gmail.com');                     echo 'account created successfully. kindly visit     email addres , activate account.';                 exit();                  }                 else              {                 echo 'same username exists';                 $username="";                 }             }             else echo 'enter same password in both';     }     else echo 'enter fields'; } ?>   <fieldset> <legend>signup</legend> <form action="<?php echo $_server['php_self'];?>" method="post" > username:<input type="text" id="username" name="username"  /> password:<input type="password" name="password" id="password" /> email<input type="text" name="email" id="email" /> contact number<input type="text" name="phone" id="phone" /> confirm password:<input type="password" name="confirm" id="confirm" /> </fieldset> <input type="submit" name="submit" value="sign up" /> </form> </body> </html>

so mailing user signs unique username password activation mail. generate random number, store particular random number in database of user , there's activation field in database either 0 or 1 ( not activated or activated). when user logs in , check activtion field, if ok continue, else check $_get[activation] field of url, if matches random number stored in database continue else return activation error. how or there's other way. how delete accounts havent been activated after period.

i not create activation key rand(). possible 2 persons same number.

so use sha1() username , current time.

for automatic deletion of inactivated accounts:

you create cronjob automatically checks difference between registration time , current time.


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