php - Token Validation and Expireation -

i'm trying set user registration system creates token expires after 48 hours (2 days). attempted program no avail. when test code error

a php error encountered
severity: error
message: class 'timedate' not found
filename: models/user_model.php
line number: 58

below code

    public function istokenvalid($token) {     $q = $this->db->get_where('tokens', array('token' => $token), 1);             if($this->db->affected_rows() > 0){         $row = $q->row();                       $created = $row->created;         $createdts = strtotime($created);         $expiredate = new timedate('y-m-d');          //$todayts = strtotime($today);         $expiredate->add(new dateinterval('p2d'));         if($createdts != $expiredate){             return false;         }          $user_info = $this->getuserinfo($row->user_id);         return $user_info;      }else{         return false;     }  }   

you use strtotime()

assuming:

// timestamp token created $created = $row->created; 

since token expire after 48 hours, need add 48 hours date variable $created

$expiredate = date("y-m-d h:i:s", strtotime($created . " + 48 hours")); 

if want date part , not time, can omit h:i:s
can compare $expiredate today's timestamp.

$today = date("y-m-d h:i:s"); if (strtotime($today) > strtotime($expire)) {     echo "expired"; } else {     echo "not yet"; }