实例化php类的时候如何传参

<?php      class person{          var $name;          var $color;          var $sex;          var $age;          function __construct($name,$age='',$sex='boy'){              $this->name = $name;              $this->age = $age;              $this->sex = $sex;              $this->color = 'yello';          }          function eat(){              echo $this->name.'要吃饭';          }          function xinxi(){              echo $this->name.' is '.$this->sex.' and age is '.$this->age.' fuse is '.$this->color;          }      }  ?>  

<?php      include('person.class.php');      $son = new person('cuihua',25,'girl');//此处的参数传递要和类的构造方法里面的参数顺序对应      //$son->xinxi();//cuihua is girl and age is 25 fuse is yello      $son->name = '田妞';      $son->eat();//田妞要吃饭  ?>