json_encode it seems that, in the case of only one element with index =
0, it returns an incorrect result.

$array = [];
$array[0] = "Some text"

it should return (in Firefox 90.0.2)

{"0": "Some text"}

and instead returns a string like

["Some text"]

If I add other elements, like

$array[101] = "Some text 2"
$array[1234] = "Some text 3"

the result is correct:

{"0":"Some text","101":"Some text 2","1234":"Some text 3"}

Try this code:

<?php

$array=[];
$array[0]="Some text";
var_dump($array);

$json=json_encode($array);
var_dump($json);

$array=[];
$array[0]="Some text";
$array[101]="Some text 2";
$array[1234]="Some text 3";
var_dump($array);

$json=json_encode($array);
var_dump($json);

?>

Thank's

--
>> Torakiki

Torakiki:

> json_encode it seems that, in the case of only one element with index =
> 0, it returns an incorrect result.
>
> $array = [];
> $array[0] = "Some text"
>
> it should return (in Firefox 90.0.2)
>
> {"0": "Some text"}

Why? $array is still just an array with one scalar element.

> and instead returns a string like
>
> ["Some text"]

Which is valid json as well. This defines an array with one element.

See: <https://www.json.org/json-en.html>

--
Arno Welzel
https://arnowelzel.de

On Thu, 05 Aug 2021 18:41:04 +0200, Arno Welzel wrote:

> Torakiki:
>
>> json_encode it seems that, in the case of only one element with index =
>> 0, it returns an incorrect result.
>>
>> $array = [];
>> $array[0] = "Some text"
>>
>> it should return (in Firefox 90.0.2)
>>
>> {"0": "Some text"}
>
> Why? $array is still just an array with one scalar element.
>
>> and instead returns a string like
>>
>> ["Some text"]
>
> Which is valid json as well. This defines an array with one element.
>
> See: <https://www.json.org/json-en.html>

From that link, the OP's "unexpected" string
>> ["Some text"]
expresses an array, which (in this case) contains one element.

Had the OP added
$array[1] = "Other text"
the results probably would have been expressed as
["Some text","Other text"]

But...

The OP changed the sequential array into a sparse array by
assigning additional elements asequentially:
>> $array[101] = "Some text 2"
>> $array[1234] = "Some text 3"

Because of the "sparseness" of this object, it can't be
expressed as a JSON array, so json_encode() encoded the
input sparse array as a JSON object.

--
Lew Pitcher
"In Skills, We Trust"

> Why? $array is still just an array with one scalar element.

Try this (last PHP 7.4.22 x64):

<?php

$array=[];
$array[0]="Some text";
var_dump($array);

$json=json_encode($array);
var_dump($json);

$array=[];
$array[1]="Some text";
var_dump($array);

$json=json_encode($array);
var_dump($json);

?>

you get

---------------------------------------------
array(1) {

[0]=>

string(9) "Some text"

}

string(13) "["Some text"]"

array(1) {

[1]=>

string(9) "Some text"

}

string(17) "{"1":"Some text"}"
---------------------------------------------

IMHO, seem to be a bug!

--
>> Torakiki

On 05/08/2021 21:25, Torakiki wrote:
>
> > Why? $array is still just an array with one scalar element.
>
> Try this (last PHP 7.4.22 x64):
>
> <?php
>
> $array=[];
> $array[0]="Some text";
> var_dump($array);
>
> $json=json_encode($array);
> var_dump($json);
>
>
> $array=[];
> $array[1]="Some text";
> var_dump($array);
>
> $json=json_encode($array);
> var_dump($json);
>
> ?>
>
> IMHO, seem to be a bug!

nope, not a bug, just a standard how to represent different types of arrays.
https://cswr.github.io/JsonSchema/spec/arrays/

Lew Pitcher:

> On Thu, 05 Aug 2021 18:41:04 +0200, Arno Welzel wrote:
>
>> Torakiki:
>>
>>> json_encode it seems that, in the case of only one element with index =
>>> 0, it returns an incorrect result.
>>>
>>> $array = [];
>>> $array[0] = "Some text"
>>>
>>> it should return (in Firefox 90.0.2)
>>>
>>> {"0": "Some text"}
>>
>> Why? $array is still just an array with one scalar element.
>>
>>> and instead returns a string like
>>>
>>> ["Some text"]
>>
>> Which is valid json as well. This defines an array with one element.
>>
>> See: <https://www.json.org/json-en.html>
>
> From that link, the OP's "unexpected" string

Why? The string

["some text"]

is a valid JSON array.

Also see here:

<https://jsonformatter.curiousconcept.com>
<http://json.parser.online.fr>

[...]
> The OP changed the sequential array into a sparse array by
> assigning additional elements asequentially:
>>> $array[101] = "Some text 2"
>>> $array[1234] = "Some text 3"
>
> Because of the "sparseness" of this object, it can't be
> expressed as a JSON array, so json_encode() encoded the
> input sparse array as a JSON object.

Correct.

--
Arno Welzel
https://arnowelzel.de

Torakiki:

>
> > Why? $array is still just an array with one scalar element.
>
> Try this (last PHP 7.4.22 x64):
>
> <?php
>
> $array=[];
> $array[0]="Some text";
> var_dump($array);
>
> $json=json_encode($array);
> var_dump($json);
>
>
> $array=[];
> $array[1]="Some text";
> var_dump($array);
>
> $json=json_encode($array);
> var_dump($json);
>
> ?>
>
> you get

Can you PLEASE format your output to NOT take up so much space, thank you!

And no this is not a bug, since JSON arrays can't have keys and therefor
PHP MUST create a JSON object list instead of an array.

--
Arno Welzel
https://arnowelzel.de