Re: [PHP5]__get, __set and isset()

Frédéric hardy wrote:

Is it possible to do something like this : class foo {

    private $array = array();

    function __construct()
    {
        ...
    }

    function __get($key)
    {
        return (isset($this->array[$key]) == false ? null : $this->array[$key]);
    }

    function __set($key, $value)
    {
        $this->array[$key] = $value;
    }

} $foo = new foo(); if (isset($foo->bar) == false)

    $foo->bar = 'bar';

else

    echo $foo->bar;

It seems that isset($foo->bar) return ALWAYS false. Bug ?

Not a bug, __get() and __set() are called only if !isset($foo->var). The purpose of __get and __set is to implement transparent getters and setters without forcing users to do function setVal($val) {

    $this->val = $val;

} function getVal() {

    return $this->val;

} If you are not sure which properties even exist, you probably shouldn't be using __get()/__set(), or should refactor so that you can rely upon certain values existing. If absolutely necessary, you can always provide function ifexists($name) {

    return isset($this->array[$name]);

} and then you can if ($o->ifexists('a')) instead of if (isset($o->a)) Greg