Bug #72081 [Dup]: __get called before __isset

From: Date: Sat, 23 Apr 2016 14:26:37 +0000
Subject: Bug #72081 [Dup]: __get called before __isset
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-200715@lists.php.net to get a copy of this message
Edit report at https://bugs.php.net/bug.php?id=72081&edit=1

 ID:                 72081
 User updated by:    jarnix at jarnix dot com
 Reported by:        jarnix at jarnix dot com
 Summary:            __get called before __isset
 Status:             Duplicate
 Type:               Bug
 Package:            Class/Object related
 Operating System:   linux
 PHP Version:        5.6.20
 Block user comment: N
 Private report:     N

 New Comment:

If it's a duplicate and it's fixed in 7.0.6, does it mean it won't be fixed in the
5.6 branch ?


Previous Comments:
------------------------------------------------------------------------
[2016-04-22 22:55:13] nikic@php.net

Duplicate of #72056, which is already fixed in 7.0.6.

------------------------------------------------------------------------
[2016-04-22 22:50:59] jarnix at jarnix dot com

wrong package

------------------------------------------------------------------------
[2016-04-22 22:46:54] jarnix at jarnix dot com

Description:
------------
I have an object when I override __get and __isset. I try to use __isset but it seems that the __get
is called before __isset. It's not the same thing with arrays (I can do
isset($someArray['existingParentKey']['notExistingChildKey']) or
isset($someArray['notExistingParentKey']['notExistingChildKey']) without
problem.

I added multiple examples and comments to show it.

Maybe it's the expected behaviour. The __get should try __iset before trying to get the value,
but it doesn't seem logical.

It might be a duplicate of #72056 (__get is called for testing if chained property is set)

Test script:
---------------
<?php

class Config
{
    
    protected static $data;
    
    public static function init() {
        self::$data = new \StdClass();
        self::$data->parent = new \StdClass();
    }
    
    public function __get($key) {
        return self::$data->$key;
    }
    
    public function __isset($key) {
        return(isset(self::$data->$key));
    }
    
}

$config = new Config();

// prints "is set", as expected
if(isset($config->parent)) {
    echo 'is set' . PHP_EOL;
}
else {
    echo 'not set' . PHP_EOL;
}

// should print "not set" but throws an exception before
if(isset($config->parent->notChild)) {
    echo 'isset' . PHP_EOL;
}
else {
    echo 'not set' . PHP_EOL;
}

// prints "not set"
if(isset($config->notParent)) {
    echo 'is set' . PHP_EOL;
}
else {
    echo 'not set' . PHP_EOL;
}


// should write "not set" but throws an exception before
if(isset($config->notParent->test)) {
    echo 'is set' . PHP_EOL;
}
else {
    echo 'not set' . PHP_EOL;
}


Expected result:
----------------
The __isset should be called recursively before trying to __get the child element.

Actual result:
--------------
An exception is thrown, making the __isset useless.


------------------------------------------------------------------------



--
Edit this bug report at https://bugs.php.net/bug.php?id=72081&edit=1


Thread (1 message)

  • jarnix at jarnix dot com
  • Unknown Message
    • jarnix at jarnix dot com
« previous php.bugs (#200715) next »