PHP容器类的两种实现方式示例_php技巧_

 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]); } } } 

 $container = new MagicContainer(); $container->logger = function ($msg){ file_put_contents('info.log',$msg.PHP_EOL,FILE_APPEND); }; $logger = $container->logger; $logger('magic container works'); 

 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]); } } } 

 $container = new ArrayContainer(); $container['logger'] = function ($msg){ file_put_contents('info.log',$msg.PHP_EOL,FILE_APPEND); }; $logger = $container['logger']; $logger('array container works'); 

 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]); } } } 

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