final class a{}
class a{
  final public function A(){}
}

abstract class a {
  public abstract function func();
}
class A extends a{
  public function func(){}
}

abstract class name{}

abstract public function name($val);

interface a{
  function func();
}
class A implements a {
  function func(){}
}

class A implements a,b,c{}

interface a extends b{}

<?php
class bee{
  public $ol = array();
  public function __get($key){
    if(isset($this->ol[$key])){
      return $this->ol[$key];
    }
    return $key.' not exists';
  }
  public function __set($key,$val){
    $this->ol[$key] = $val;
  }
  public function __isset($key){
    if(isset($this->ol[$key])){
      return true;
    }
    return false;
  }
  public function __unset($key){
    unset($this->ol[$key]);
  }
}
$obj = new bee();
echo $obj->one;
echo '<br>';
$obj->one = 1;
echo $obj->one;
echo '<br>';
var_dump(isset($obj->one));

one not exists
1
boolean true

<?php
class bee{
  public function __call($name,$arr){
    echo '<br>';
    echo 'function '.$name.' not exist';
  }
  static function __callStatic($name,$arr){
    echo '<br>';
    echo 'function '.$name.' not exist';
  }
  /*public function __call($name,$arr){
    $num = count($arr);
    if($num<1){
      $name();
    }else{
      $name = $name.'_one';
      $name($arr[0]);
    }
  }*/
}
$obj->func();
bee::staFunc();
/*$obj->func(1);
function func(){
  echo '<br>';
  echo 'no.0';
}
function func_one($val){
  echo '<br>';
  echo 'no.'.$val;
}*/

function func not exist
function staFunc not exist