JSON encode and decode (string)numeric indexed array

Question

So I just stumbled upon this issue with array conversion to JSON and back to array. I used the function to store the array in database.

Code:

$array = array(
    1 => 'first',
    '200'  => 'second'
);
$array = json_encode($array);
$array = json_decode($array);
$array = (array)$array;

echo "<pre>"; var_dump($array);
var_dump(array_key_exists(1, $array));
var_dump(array_key_exists(200, $array));
var_dump(array_key_exists('1', $array));
var_dump(array_key_exists('200', $array));

Output:

array(2) {
  ["1"]=>
  string(5) "first"
  ["200"]=>
  string(6) "second"
}
bool(false)
bool(false)
bool(false)
bool(false)

Any explanation? Solution? Thanks?

@PaulCrovella so, there's no workaround for this in previous version? I'm working on this ancient website and would mess things up if I update PHP version just for this. :) — ACD
– ACD, Commented Oct 26, 2018 at 4:06

F.Igor · Accepted Answer · 2018-10-26 04:06:39Z

2

Instead of

$array = json_encode($array); $array = json_decode($array); $array = (array)$array;

you only need to add a parameter to convert to array in json_decode

$encoded_array = json_encode($array); $array = json_decode($encoded_array, true);

See documentation about json_decode() in http://php.net/manual/en/function.json-decode.php

answered Oct 26, 2018 at 4:06

F.Igor

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1 Comment

ACD Over a year ago

Like a glove! (not sure if im using the expression correctly). Thanks

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