<?php
class Observer
{
protected function callme()
{
}
}
class MyParent extends Observer
{
function createChild()
{
$this->callme(); // this is OK
return new MyChild (function() { $this->callme(); });
}
}
class MyChild
{
private $gatewayFunction;
public function __constructor (Closure $gatewayFunction)
{
$this->gatewayFunction = $gatewayFunction;
}
public function __destroy()
{
$this->gatewayFunction->__invoke();
}
}
$p = new MyParent();
$c = $p->createChild();
var_dump($c);
$c->__destroy();
object(MyChild)#2 (1) {
["gatewayFunction":"MyChild":private]=>
NULL
}
Fatal error: Uncaught Error: Call to a member function __invoke() on null in /in/LPUsJ:28
Stack trace:
#0 /in/LPUsJ(35): MyChild->__destroy()
#1 {main}
thrown in /in/LPUsJ on line 28
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
object(MyChild)#2 (1) {
["gatewayFunction":"MyChild":private]=>
NULL
}
Fatal error: Uncaught Error: Call to a member function __invoke() on null in /in/LPUsJ:28
Stack trace:
#0 /in/LPUsJ(35): MyChild->__destroy()
#1 {main}
thrown in /in/LPUsJ on line 28
Process exited with code 255.
Output for 5.6.0 - 5.6.40
object(MyChild)#2 (1) {
["gatewayFunction":"MyChild":private]=>
NULL
}
Fatal error: Call to a member function __invoke() on null in /in/LPUsJ on line 28
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
object(MyChild)#2 (1) {
["gatewayFunction":"MyChild":private]=>
NULL
}
Fatal error: Call to a member function __invoke() on a non-object in /in/LPUsJ on line 28
Process exited with code 255.