Hello -
I think there is a bug or a paradox in the php 5 object model
implementation.
This is an example :
<?php
class foo implements arrayAccess
{
private $array = array();
function __construct() {}
function __get($key)
{
return $this->offsetGet($key);
}
function __set($key, $value)
{
$this->offsetSet($key, $value);
}
function offsetExists($key)
{
return isset($this->array[$key]);
}
function offsetGet($key)
{
return $this->array[$key];
}
function offsetSet($key, $value)
{
$this->array[$key] = $value;
}
function offsetUnset($key)
{
unset($this->array[$key];
}
}
$foo = new foo();
echo (isset($foo['bar']) == true ? 'set' : 'not set');
$foo['bar'] = 'bar';
echo (isset($foo['bar']) == true ? 'set' : 'not set');
echo $foo['bar'];
#Expected result :
# not set
# set
# bar
#Real result
# not set
# set
# bar
# !! GREAT !!
#Now, the same thing with __get() and __set()
unset($foo);
$foo = new foo();
echo (isset($foo->array) == true ? 'array is set' : 'array is not set');
echo (isset($foo->bar) == true ? 'bar is set' : 'bar is not set');
$foo->bar = 'bar';
echo (isset($foo['bar']) == true ? 'bar is set' : 'bar is not set');
echo $foo->bar;
#Expected result :
# array is set
# bar is not set
# bar is set
# bar
#Real result
# array is set # Ok !
# bar is not set # Ok !
# bar is not set # PROBLEM PROBLEM
# bar
# !! NOT GREAT !!
?>
It is very strange.
isset() does not return the good value on property wich was set with
__set() !!
But isset() return the good value on property wich was set in the
class !!
And isset() return the good value on value wich was set with
offsetSet() method !!
It is a paradox !
I think that isset MUST return the same value in all case.
What do you think of ?
Fred.
Warning : the php code may be wrong (parse error...), i can not
validate it in php5 currently
