Bug #78480 [NEW]: The typed properties miss an important "function"
From: manchokapitancho at gmail dot com
Operating system:
PHP version: 7.4.0beta4
Package: Scripting Engine problem
Bug Type: Bug
Bug description:The typed properties miss an important "function"
Description:
------------
The new PHP 7.4 feature - typed properties is a great addition to the
language.
As a side effect it adds a brand new state of the class/object
properties - initialized=yes/no.
If one tries to access an uninitialized property, a TypeError is being
thrown.
isset($object->prop) does not trigger TypeError but it returns false if
$object->prop is NULL.
The suggested check is only indirectly possible via the long construct
(new ReflectionProperty(<name>::class, '<prop>'))->isInitialized($obj)
On the other side, unset works perfectly well and returns a property
back into the uninitialized state.
This write-only asymmetry is not consistent and I would expect a
language construct similar to isset [e.g. is_initialized($obj->prop)]
that handles this case.
Test script:
---------------
class test {
public ?int $prop;
}
$obj = new test;
var_dump(isset($obj->prop));
var_dump(is_initialized($obj->prop));
$obj->prop = null;
var_dump(isset($obj->prop));
var_dump(is_initialized($obj->prop));
Expected result:
----------------
false
false
false
true
Actual result:
--------------
false
<missing>
false
<missing>
--
Edit bug report at https://bugs.php.net/bug.php?id=78480&edit=1
--
Fix committed: https://bugs.php.net/fix.php?id=78480&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=78480&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=78480&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=78480&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=78480&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=78480&r=support
Expected behavior: https://bugs.php.net/fix.php?id=78480&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=78480&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=78480&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=78480&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=78480&r=phptooold
Daylight Savings: https://bugs.php.net/fix.php?id=78480&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=78480&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=78480&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=78480&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=78480&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=78480&r=mysqlcfg
Thread (10 messages)
- manchokapitancho at gmail dot com