如何将JSON字符串更改为单个数组

Question

I have a json string, now i want it to become another string like an array and the $key is the same with $value

original string:

$input='
{
        "label_values":[
        "OK1","OK2","OK3"
        ]
}'

tried json_decode

$obj = json_decode($input);
$results = $obj->{'label_values'};
$result = implode(",", $results);

and $result export OK1,OK2,OK3

$key is the same with $value,i want it change to below example

Array(
        "OK1"=>"OK1",
        "OK2"=>"OK2",
        "OK3"=>"OK3"
)

Any help is greatly appreciated

Answer 1

You can simply use array_combine().

array_combine() returns an array using first argument as keys and second argument as values:

$result = array_combine( $results, $results );

<kbd>3v4l demo</kbd>

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