PHP OOP: execute() function always return null or false

I’m trying to display msg based on the return value of my function in here

class Database{
    private $host   = DB_HOST;
    private $dbname = DB_NAME;
    private $user   = DB_USER;
    private $pass   = DB_PASS;

    private $dbh, $error, $stmt;

    function __construct(){
        // Set DSN, which is database source name.
        $dsn = "mysql:host=" . $this->host . ";dbname=" . $this->dbname;
        //setting some options
        $opts = array(
            PDO::ATTR_PERSISTENT => TRUE,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        );

        try{
            $this->dbh = new PDO($dsn, $this->user, $this->pass, $opts);
        }catch(PDOException $e){
            $this->error = $e->getMessage();
        }
    }

    function query($q){ $this->stmt = $this->dbh->prepare($q); }

    function execute(){$this->stmt->execute();}

    function bind($param, $value, $type = null){
        if(is_null($type)){
            switch(true){
                case is_int($value):
                    $type = PDO::PARAM_INT;
                    break;
                case is_null($value):
                    $type = PDO::PARAM_NULL;
                    break;
                default:
                    $type = PDO::PARAM_STR;
            }
        }
        $this->stmt->bindValue($param, $value, $type);
    }
}

class Jobs extends Database{

    function create($data){
        //Insert query
        $this->query("INSERT INTO jobs (cat_id, company, job_title, description, salary, location, user, email)
                      VALUES (:cat_id, :company, :job_title, :description, :salary, :location, :user, :email)
        ");
        //bind values
        $this->bind(":cat_id", $data['cat_id']);
        $this->bind(":company", $data['company']);
        $this->bind(":job_title", $data['job_title']);
        $this->bind(":description", $data['description']);
        $this->bind(":salary", $data['salary']);
        $this->bind(":location", $data['location']);
        $this->bind(":user", $data['user']);
        $this->bind(":email", $data['email']);
        
        //execute the statment & returen true or false
        if($this->execute()){ return true; }else{ return false; }
    }

}

but, every time this code runs, it always return false. even though the query runs very normal and the data is inserted.

Here is my run code:

if($_SERVER['REQUEST_METHOD'] == "POST"){
    $data = array();
    $data['job_title']   = $_POST['job_title'];
    $data['company']     = $_POST['company'];
    $data['cat_id']      = $_POST['cat_id'];
    $data['description'] = $_POST['description'];
    $data['salary']      = $_POST['salary'];
    $data['location']    = $_POST['location'];
    $data['user']        = $_POST['user'];
    $data['email']       = $_POST['email'];

    if($jobs->create($data)){
        redirect("", "Your job has been listed", "success");
    }else{
        redirect("", "Something went wrong", "error");
    }

}

It always display "Something went wrong", but the data is being inserted.

I tried to display the return value of var_dump($jobs->create(data)); it always return null of false