Bug #81123 [Csd->Sus]: Setting a variable in a class to NULL does nothing
Edit report at https://bugs.php.net/bug.php?id=81123&edit=1
ID: 81123
Updated by: imsop@php.net
Reported by: jplevene at gmail dot com
Summary: Setting a variable in a class to NULL does nothing
-Status: Closed
+Status: Suspended
Type: Bug
Package: Unknown/Other Function
Operating System: Linux & Windows
PHP Version: 8.0.7
Block user comment: N
Private report: N
New Comment:
It sounds like there's something else in that class that's interacting with your code then
- perhaps some magic using Property Overloading (__set, __unset, etc): https://www.php.net/manual/en/language.oop5.overloading.php
Please come back to us if you find a way to reproduce the issue and still believe it is a bug with
PHP.
Previous Comments:
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[2021-06-10 15:33:38] jplevene at gmail dot com
In a simple class I can't reproduce it, but in my larger one it fails 100% of the time.
I did a workaround as setting it to false worked fine, so I left it at that.
------------------------------------------------------------------------
[2021-06-10 15:12:40] jplevene at gmail dot com
It's in a far bigger class that I discovered this. I'll run some tests now and get back
to you.
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[2021-06-10 14:44:22] imsop@php.net
Please ignore the troll, but running your script on an online sandbox doesn't reproduce the
problem: https://3v4l.org/POdHF (I've switched to var_dump
just because it shows the difference between NULL and false more clearly).
Does running that exact code on your local install gives a different result, or is there some other
code that's interacting in some way?
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[2021-06-10 14:27:38] rtrtrtrtrt at dfdfdfdf dot dfd
is it *really* that hard to provide a *full working* reproducer instead some useless comments?
your comments are simply not true
[user@localhost:/downloads]$ cat test.php
<?php
$test = new myClass;
$test->func();
class myClass {
private $var = null;
function __construct() {
$this->var = "Hello";
}
public function func()
{
$this->var = null; // Does nothing, still "Hello"
echo $this->var, "\n";
unset($this->var); // Does nothing, still "Hello"
echo $this->var, "\n";
$this->var = false; // Works
}
}
[user@localhost:/downloads]$ php test.php
Notice: Undefined property: myClass::$var in /mnt/data/downloads/test.php on line 16
[user@localhost:/downloads]$
------------------------------------------------------------------------
[2021-06-10 14:22:21] jplevene at gmail dot com
public function func()
{
$this->var = null;
print_r($this->var);// Does nothing, still "Hello"
unset($this->var);
print_r($this->var);// Does nothing, still "Hello"
$this->var = false;
print_r($this->var);// Works and prints "Hello"
}
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