Undefined Offset in php while getting array through webservice

Question

Building App in Ionic and webservices in PHP. My issue is I am getting an object from the app while hitting the api.

[option] => stdClass Object
        (
            [228] => 19
            [229] => 22
            [230] => 24
            [231] => 26
        )

In php I convert this object to array using the following code..

$option = (array)$this->request->post['option'];

Then I check its type, it is an array. But When I am trying to get the value of $option[228] it returns me an error "Undefined Offset:228". The issue may be it is finding the index value 228 rather than matching the associative key value..

How I can get the value using these numeric keys??

array(4) { ["228"]=> string(2) "19" ["229"]=> string(2) "22" ["230"]=> string(2) "24" ["231"]=> string(2) "26" } — Simerjit Parmar, Oct 14 '16 at 13:30
Notice: Undefined offset: 228 in file.php on line 578 — Simerjit Parmar, Oct 14 '16 at 13:33
@Dave - Why would that resolve it? PHP will automatically convert a string which could be an integer to an int key like [this answer explains](http://stackoverflow.com/a/4100765/2233391). `$option["228"]` can also be accessed by `$option[228]`. — Henders, Oct 14 '16 at 13:35
@henders I have read that thread too.. But didn't understand what is the issue in my case? — Simerjit Parmar, Oct 14 '16 at 13:37
Can you access the value before convert it to array? Like $option->288? — Whiteulver, Oct 14 '16 at 13:37
check what you get from $option->288 before covert in to array — RK12, Oct 14 '16 at 13:38
$option prints keys and values in foreach... I have tested that... — Simerjit Parmar, Oct 14 '16 at 13:39
@Simerjit Parmar has right. I have test it and when you convert an object, with number as properties, to array you can not access the keys, even if they exist when `var_dump`. Smells like php bug, but not sure yet — Whiteulver, Oct 14 '16 at 13:42
@RK12 I'm trying to display it $option["228"], didn't work... — Simerjit Parmar, Oct 14 '16 at 13:42
Thanks @Dave.. Code is working when I create array in php, but it is not working when I am getting data using POST method in webservice — Simerjit Parmar, Oct 14 '16 at 13:51

score 1 · Accepted Answer · answered Oct 14 '16 at 13:53

Alternate workaround is you can prepare array and then access it's key -> value pair if you require it's keys as well then, like below...

$option = array_combine(array_keys((array)$option), array_values((array)$option));

Then you can access it's elements like $option[228]

score 0 · Answer 2 · answered Oct 14 '16 at 13:42

0

You can use array_values($option) to reset the keys.

[
  0 => 29
  1 => 22
  2 => 24
  3 => 26
]

Or use the object like this:

$option->{228}

answered Oct 14 '16 at 13:42

xpuc7o

333
3
15

I can't reset the keys as I need them further too to match with the database records... – Simerjit Parmar Oct 14 '16 at 13:46
Any other option to use this object as an associative array? – Simerjit Parmar Oct 14 '16 at 13:48
You may change JSON structure to be something like: `[{id: 228, value:29}, ...]` – xpuc7o Oct 14 '16 at 13:50

Undefined Offset in php while getting array through webservice

2 Answers2