将 PHP 数组转换为类变量 [英] Converting a PHP array to class variables

问题描述

简单的问题，如何将关联数组转换为类中的变量?我知道有强制转换来做一个 (object) $myarray 或任何它是什么，但这将创建一个新的 stdClass 并且对我没有多大帮助.是否有任何简单的一两行方法可以使每个 $key =>;将数组中的 $value 配对为我的班级的 $key = $value 变量?我认为为此使用 foreach 循环不太合乎逻辑，我最好将其转换为 stdClass 并将其存储在变量中，不是吗?

Simple question, how do I convert an associative array to variables in a class? I know there is casting to do an (object) $myarray or whatever it is, but that will create a new stdClass and doesn't help me much. Are there any easy one or two line methods to make each $key => $value pair in my array into a $key = $value variable for my class? I don't find it very logical to use a foreach loop for this, I'd be better off just converting it to a stdClass and storing that in a variable, wouldn't I?

class MyClass {
    var $myvar; // I want variables like this, so they can be references as $this->myvar
    function __construct($myarray) {
        // a function to put my array into variables
    }
}

推荐答案

这个简单的代码应该可以工作:

This simple code should work:

<?php

  class MyClass {
    public function __construct(Array $properties=array()){
      foreach($properties as $key => $value){
        $this->{$key} = $value;
      }
    }
  }

?>

示例用法

$foo = new MyClass(array("hello" => "world"));
$foo->hello // => "world"

<小时>

或者，这可能是更好的方法

---

Alternatively, this might be a better approach

<?php

  class MyClass {

    private $_data;

    public function __construct(Array $properties=array()){
      $this->_data = $properties;
    }

    // magic methods!
    public function __set($property, $value){
      return $this->_data[$property] = $value;
    }

    public function __get($property){
      return array_key_exists($property, $this->_data)
        ? $this->_data[$property]
        : null
      ;
    }
  }

?>

用法相同

// init
$foo = new MyClass(array("hello" => "world"));
$foo->hello;          // => "world"

// set: this calls __set()
$foo->invader = "zim";

// get: this calls __get()
$foo->invader;       // => "zim"

// attempt to get a data[key] that isn't set
$foo->invalid;       // => null

这篇关于将 PHP 数组转换为类变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！