PHP容器类的两种实现方式示例

本文实例讲述了php容器类的两种实现方式。分享给大家供大家参考，具体如下：

通过魔术方法实现

class

class magiccontainer{
  private $ele;
  function __construct()
  {
    $this->ele = [];
  }
  function __set($name, $value)
  {
    $this->ele[$name] = $value;
  }
  function __get($name)
  {
    return $this->ele[$name];
  }
  function __isset($name)
  {
    return isset($this->ele[$name]);
  }
  function __unset($name)
  {
    if(isset($this->ele[$name])){
      unset($this->ele[$name]);
    }
  }
}

usage

$container = new magiccontainer();
$container->logger = function ($msg){
  file_put_contents('info.log',$msg.php_eol,file_append);
};
$logger = $container->logger;
$logger('magic container works');

通过arrayaccess接口实现

class

class arraycontainer implements arrayaccess {
  private $elements;
  public function __construct()
  {
    $this->elements = [];
  }
  public function offsetexists($offset){
    return isset($this->elements[$offset]);
  }
  public function offsetget($offset){
    if($this->offsetexists($offset)){
      return $this->elements[$offset];
    }else{
      return false;
    }
  }
  public function offsetset($offset, $value){
    $this->elements[$offset] = $value;
  }
  public function offsetunset($offset){
    if($this->offsetexists($offset)){
      unset($this->elements[$offset]);
    }
  }
}

usage

$container = new arraycontainer();
$container['logger'] = function ($msg){
  file_put_contents('info.log',$msg.php_eol,file_append);
};
$logger = $container['logger'];
$logger('array container works');

container

class

class container implements arrayaccess {
  private $elements;
  public function __construct()
  {
    $this->elements = [];
  }
  public function offsetexists($offset){
    return isset($this->elements[$offset]);
  }
  public function offsetget($offset){
    if($this->offsetexists($offset)){
      return $this->elements[$offset];
    }else{
      return false;
    }
  }
  public function offsetset($offset, $value){
    $this->elements[$offset] = $value;
  }
  public function offsetunset($offset){
    if($this->offsetexists($offset)){
      unset($this->elements[$offset]);
    }
  }
  function __set($name, $value)
  {
    $this->elements[$name] = $value;
  }
  function __get($name)
  {
    return $this->elements[$name];
  }
  function __isset($name)
  {
    return isset($this->elements[$name]);
  }
  function __unset($name)
  {
    if(isset($this->elements[$name])){
      unset($this->elements[$name]);
    }
  }
}

usage

$container = new container();
$container['logger'] = function ($msg){
  file_put_contents('info.log',$msg.php_eol,file_append);
};
$logger = $container->logger;
$logger('container works');