drapeaux.php

<?php

if (isset($_GET["hash"])) {
    $hash = $_GET["hash"];
    if (file_exists ("data.json"))
        $json = file_get_contents ("data.json");
    else
        $json = "{}";

    $obj = json_decode ($json);
    if ($obj == null)
        $obj = json_decode ("{}");
    if (isset($obj->{$hash}))
        echo $obj->{$hash};
    else
        echo "e30="; // => "{}"
    return;
}

if (!isset($_POST["json"]) || !isset($_POST["hash"])) {
    echo "-1";
    return;
}

$data = $_POST["json"];
$hash = $_POST["hash"];

if (file_exists ("data.json"))
    $json = file_get_contents ("data.json");
else
    $json = "{}";

$obj = json_decode ($json);
if ($obj == null)
    $obj = json_decode ("{}");
$obj->{$hash} = $data;
file_put_contents ("data.json", json_encode ($obj));
echo "0";
?>