PHP把数组转换成对象操作

array_to_object.php

<?php
class Arr
{
    private $arr = [];

    public function __construct($arr = [])
    {
        // init array
        if(is_array($arr)) {
            $this->arr = $arr;
        } else {
            $this->arr = unserialize($arr);
        }
    }

    public function __invoke($key)
    {
        // get array key
        return $this->arr[$key];
    }

    public function __toString()
    {
        // return arr string save in mysql
        return serialize($this->arr);
    }

    public function __get($name)
    {
        // return arr val
        return $this->arr[$name];
    }

    public function __set($key, $val)
    {
        // set arr val
        $this->arr[$key] = $val;
    }

    public function __isset($key)
    {
        // isset key result
        return isset($this->arr[$key]);
    }

    public function __unset($key)
    {
        // unset arr key
        unset($this->arr[$key]);
    }
}

$arr = new Arr([]);
$arr('hello');
$arr->hello = 5;
var_dump((string)$arr);
unset($arr->hello);
var_dump($arr->hello);
$arr->world = 10;
var_dump((string)$arr);