Re: I have two identical keys in an array.

I did some more tests this night.

here is my code

var_dump($property['id_hash']);


reset($property['id_hash']);


$k1 = key($property['id_hash']);


end($property['id_hash']);


$k2 = key($property['id_hash']);


echo PHP_EOL;


var_dump($k1 === $k2);


echo "hex k1=".bin2hex($k1).PHP_EOL;


echo "hex k2=".bin2hex($k2).PHP_EOL;


echo PHP_EOL."---".PHP_EOL;

here is the result :

array(3) {


  [-1]=>


  array(0) {


  }


  [26]=>


  array(1) {


    [0]=>


    int(10588090)


  }


  [-1]=>


  array(1) {


    [0]=>


    int(10588090)


  }


}





bool(true)


hex k1=2d31


hex k2=2d31



it's nuts. I don't understand. It started to happen when I upgrade from php
7.2 to php 8.0
I am running the latest 8.0.16 php version.

the fact is I can't reproduce it, it happens after a few iteration around
items. Sometimes it happens, sometimes not.


On Fri, 4 Mar 2022 at 20:15, AllenJB <[email protected]> wrote:

>
> On 04/03/2022 15:34, Romain Moyne wrote:
> > Hi,
> >
> > working with php 8.0.16, i am meeting a hard bug I can't really explain.
> > One of my script populates an array and doing a var_dump I have that :
> >
> > Notice the duplicate -1 key. It should not exist as php should erase
> > the previous key.
> >
> > array(3) {
> >   [-1]=>
> >   array(1) {
> >     [0]=>
> >     int(10585779)
> >   }
> >   [18]=>
> >   array(2) {
> >     [0]=>
> >     int(10585779)
> >     [1]=>
> >     int(10586274)
> >   }
> >   [-1]=>
> >   array(1) {
> >     [0]=>
> >     int(10586274)
> >   }
> > }
> >
> >
> > And when doing a json_encode of that, I get that :
> > "id_hash":{"-1":[10585779],"18":[10585779,10586274],"-1":[10586274]}
> >
> >
> > I suspected a utf8 misencoding, but it seems it's not.
> >
> > Any thoughts?
>
> My best guess would be that one or more of the keys contains a
> non-printable character, such as a null byte.
>
> You could us bin2hex on the keys to find out what's going on
>
> See for example: https://3v4l.org/BMLMI
>
>