如何在php pdo中使用2表获取1表用户的详细信息？

Question

Hi can anyone help am trying fetch all user data from database using php and pdo method

i have two tables 1 table for users data, 2 for connected users id's ,

i want fetch only connected users profiles when users id exit in 2 table.

first i checked 2 table whether user id there or not. example a user connected to 2 other users , i got users ids and implode into array. then i used to check 1 table Where In (:usid) but its fetching only one user details

how can i fetch all details using 2 database

    public function usrconnectedall(){
        $bngusername2 = $_SESSION['bngusername'];
        $this->query("SELECT * FROM bng_users WHERE bng_username=:bngusername2");
        $this->bind(":bngusername2", $bngusername2);
        $row = $this->getSingleRow();

        //First Method (Requested) user profile id
        $bngrequesteduserid = $row['id'];

        $this->query("SELECT * FROM bng_connect WHERE bng_requesteduser_id=:bngrequesteduserid");
        $this->bind(":bngrequesteduserid", $bngrequesteduserid);
        $row2 = $this->resultSet();

        foreach ($row2 as $k) {
          $test[] = $k['bng_connecteduser_id'];
        }
        $usid = implode(',', $test);


        $this->query("SELECT * FROM bng_users WHERE id IN (:usid)");
        $this->bind(":usid", $usid);
        $row3 = $this->resultSet();

        foreach ($row3 as $a){
           echo $a['bng_username'];
        }


      }

Answer 1

This is answer i found. now am able to fetch users data

$usid = implode(',', $test);

    $this->query("SELECT * FROM bng_users WHERE  FIND_IN_SET (id, :usid)");
    $this->bind(':usid', $usid);
    $row3 = $this->resultSet();

    return $row3;