gistfile1.txt

<?php 
class People {
  
  public $idcard;
  public $name;
  
  public function __construct() {
    $this->idcard = '';
    $this->name = 'Unknow';
  }
  
  public function setName($name) {
    $this->name = $name;
  }
  
}

$man = new People();
echo $man->name;