Defman21

<?php

class test {
    public function foo() {
        echo "foo";
        return $this;
    }
    
    public function bar() {
        echo "bar";
    }
}

$obj = new test();

$obj->foo()->bar();

function check_fullname($name) {
  return preg_match('/^[А-Яа-яёЁ]+$/u', $name);
}

$stmt->execute($Data_object->get_filds_in_assoc_array()['array']['return_array']['VDS_min']);