<?php
class human{
      var $name="15";
    var $height;
    var $weight;
    public function eat($food,$name){
        echo $this->name=$name ."s eat ".$food;
    
    }
    public function _construct($height,$weight){
        
    echo    $this->height=$height;
    echo    $this->weight=$height;
        }
}
class nba extends human{
}
$jo=new nba();
 echo $jo->name;
 echo $jo->eat("kafei","lidepeng");
$s=new  human();
$s->_construct("180", "120");

面向对象