<?php
class Foo
{
protected $props;
public function __get($key)
{
if (isset($props[$key]))
{
return $this->props[$key];
}
}
public function __set($key, $value)
{
$this->props[$key] = $value;
}
}
$foo = new Foo;
$foo->bar = new Foo;
$foo->bar->baz = 'quix';
var_dump($foo->bar, $foo->bar->baz);
Notice: Indirect modification of overloaded property Foo::$bar has no effect in /in/Pmt9p on line 25
Fatal error: Uncaught Error: Attempt to assign property "baz" on null in /in/Pmt9p:25
Stack trace:
#0 {main}
thrown in /in/Pmt9p on line 25
Process exited with code 255.
Notice: Indirect modification of overloaded property Foo::$bar has no effect in /in/Pmt9p on line 25
Warning: Creating default object from empty value in /in/Pmt9p on line 25
Notice: Trying to get property 'baz' of non-object in /in/Pmt9p on line 27
NULL
NULL
Output for 7.3.32 - 7.3.33
Warning: Creating default object from empty value in /in/Pmt9p on line 25
NULL
NULL
Notice: Indirect modification of overloaded property Foo::$bar has no effect in /in/Pmt9p on line 25
Warning: Creating default object from empty value in /in/Pmt9p on line 25
Notice: Trying to get property of non-object in /in/Pmt9p on line 27
NULL
NULL
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29
Notice: Indirect modification of overloaded property Foo::$bar has no effect in /in/Pmt9p on line 25
Strict Standards: Creating default object from empty value in /in/Pmt9p on line 25
Notice: Trying to get property of non-object in /in/Pmt9p on line 27
NULL
NULL
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
Strict Standards: Creating default object from empty value in /in/Pmt9p on line 25
Notice: Trying to get property of non-object in /in/Pmt9p on line 27
NULL
NULL
Output for 5.0.0 - 5.0.3
Fatal error: Cannot access undefined property for object with overloaded property access in /in/Pmt9p on line 25
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Pmt9p on line 6
Process exited with code 255.
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Pmt9p on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/Pmt9p on line 6
Process exited with code 255.