json_encode null to empty string.

json_encode-null-to-empty-string-1.php

$value = array(
    "deep"=>1,
    "data"=>null,
    "node"=>array(
        "deep"=>2,
        "data"=>null,
        "node"=>array(
            "deep"=>3
        )
    ),
    null
);

function convert_before_json(&$item, $key)
{
    $item = utf8_encode($item);
}

array_walk_recursive($value, "convert_before_json");

echo json_encode($data);

json_encode-null-to-empty-string-2.php

$value = array(
    "deep"=>1,
    "data"=>null,
    "node"=>array(
        "deep"=>2,
        "data"=>null,
        "node"=>array(
            "deep"=>3
        )
    ),
    null
);

array_walk_recursive($value, function (&$item, $key) {
    $item = null === $item ? '' : $item;
});

echo json_encode($value);

Thanks ! <3

Thank you, this was driving me crazy!

thankks a lot

thank its help me a lot !!!
I got an error if the collection didn't have a null value. how can i handle it ? thank you !!!