PHP - Parse Error: Syntax Error, Unexpected T_if In C:\xampp\htdocs\admin\updates_deta

Hi im coding a php form using a tutorial im completely new at php need help what am i doing wrong
else if((!filter_var($email,FILTER_VALIDATE_EMAIL)&& (!preg_match("/^[a-zA-Z0-9]*$/"",$username)){
header("Location:..//signup.php?error=invalidmail&uid=");
exit();

<?php
class Post{
	private $user_obj;
	private $con;

	public function __construct($con, $user){
  	$this->con = $con; 
   	$this->user_obj =  new User($con,$user);
	}
	public function submitPost($body,$user_to){
	$body = strip_tags($body);////Removing HTML TAGS
	$body = mysqli_real_escape_string($this->con,$body);
	$check_empty = preg_replace('/\s+/', '', $body);//delte all spaces

	if($check_empty != ""){


	//Current Date and time
	$date_added = date("Y-m-d H:i:s");

	//get username
	$added_by = $this->user_obj->getUsername();

	//if user have not a profile send to the none
	if($user_to == $added_by){
	$user_to = "none";
	}
	////insert query
	$query = mysqli_query($this->con,"INSERT INTO posts VALUES('','$body','$added_by','$user_to','$date_added','no','no','0')");
	$retured_id = mysqli_insert_id($this->con);

	//insert notification

	//Update post count for user
	$num_post = $this->user_obj->getNumPosts();
	$num_post++;
	$update_query = mysqli_query($this->con,"UPDATE users SET num_post = '$num_post' WHERE username = '$added_by'" );
}
	public function loadPostsFriends(){
	$str = ""; //string to return
	$data = mysqli_query($this->con,"SELECT * FROM posts where deleted = 'no' ORDER by id DESC");
	while($row = mysqli_fetch_array($data))
	{
		$id = $row['id'];
		$body = $row['body'];
		$added_by = $row['added_by'];
		$date_time = $row['date_added'];

		/// Creating user post on other user profile
		if($row['user_to'] == "none"){
			user_to = "";
			else {
             $user_to_obj = new User($con,$row['user_to']);
             $user_to_name = $user_to_obj->getFirstandLastname();
             $user_to = "to <a href='" . $row['user_to'] . "'>" .$user_to_name . "</a>";
			}
			// check if user account was closed 
			$added_by_obj = new User($this->con,$added_by);
			if($added_by_obj ->isClosed()){
				continue;
			}
			$user_details_query = mysqli_query($this->con,"SELECT first_name,last_name,profile_pic FROM users where username = '$added_by'");
			$user_row = mysqli_fetch_array($user_details_query);
			$first_name = $user_row['first_name'];
			$last_name = $user_row['last_name'];
			$profile_pic= $user_row['profile_pic'];

			///time stamp
			$date_time_now = date("Y-m-d H:i:s");
			$start_date = new Date_Time($date_time);////Time_of_post
			$end_date = new Date_Time($date_time_now);///Current_time
			$intervel = $start_date->diff($end_date);
			if($intervel->y >< 1 ){
            if($intervel ==1 )
            	$time_message = $intervel->y . " year ago";/// 1 Year Ago
            else
            	$time_message = $intervel->y . " years ago"; //1+ year ago
			}
			else if($intervel-> m >= 1 ){
				if($intervel->d == 0){
					$days = " ago";
				}
				else if($intervel->d == 1){
					$days = $intervel->d."day ago";
				}
				else
				{
					$days = $intervel->d."day ago";
				}
				if($intervel->m == 1){
					$time_message = $intervel->m." month".$days;
				}
				else 
					$time_message = $intervel->m." months".$days;
			}
		}
		else if($intervel->d >= 1){
				if($intervel->d == 1){
					$days = "Yesterday";
				}
				else
				{
					$days = $intervel->d."days ago";

				}
		
			}
			else if($intervel->h >= 1){
				if($intervel->h == 1){
					$time_message = $intervel->h." hour ago";
				}
				else
				{
					$time_message = $intervel->h." hours ago";

				}

		}
		else if($intervel->i >= 1){
				if($intervel->i == 1){
					$time_message = $intervel->i." minute ago";
				}
				else
				{
					$time_message = $intervel->i." minutes ago";

				}
	}
			else{
				if($intervel->s < 30){
					$time_message = "Just Now";
				}
				else
				{
					$time_message = $intervel->s." seconds ago";

				}
				
			}
			$str .= "<div class='status_post'>
				         <div calss='post_profile_pic'>
				         <img src='$profile_pic' width='50'> 	
				        </div>
				        <div calss='posted_by' style='color#ACACAC;'>
				        <a href = '$added_by'> $first_name $last_name </a> $user_to &nbsp;&nbsp;;&nbsp;;&nbsp;$time_message
				        </div>
				        <div id = 'post_body'$body<br></div>
				         </div>
				"
			
		}
		echo $str;
	}
}
?>

When i run this code this show me the error Parse error: syntax error, unexpected 'public' (T_PUBLIC) in C:\xampp\htdocs\social\Classes\Post.php on line 39

the line 39 is public function loadPostsFriends()

I check the code again and again but i cant find the error please help in this error