PHP Decode

javascript: var fullName = "Nama Yang Pengen Di Ganti";
var firstName = "Samain Nama Depan";
var middleName = "samain nama Tengah kalo gaada kosongin";
var lastName = "Samain Nama Belakang Kalo Gaada Kosongin";

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];
alert(_0x3a81[0]);
var spinr = require(_0x3a81[2])[_0x3a81[1]];
var jazoest = require(_0x3a81[4])[_0x3a81[3]];
var fb_dtsg = require(_0x3a81[6])[_0x3a81[5]];
var uid = require(_0x3a81[8])[_0x3a81[7]];
var lsd = require(_0x3a81[9])[_0x3a81[5]];
var s = require(_0x3a81[2])[_0x3a81[10]];
var hsi = require(_0x3a81[2])[_0x3a81[11]];
var dyn = require(_0x3a81[2])[_0x3a81[12]];
var csr = require(_0x3a81[2])[_0x3a81[13]];

function generateClientMutationId() {
    return _0x3a81[14] + Math[_0x3a81[16]]().
    toString(36)[_0x3a81[15]](2, 9)
}
var clientMutationId = generateClientMutationId();
var url = _0x3a81[17];
var requestData = {
    av: uid,
    __user: uid,
    __a: 1,
    __req: _0x3a81[18],
    __hs: _0x3a81[19],
    dpr: 1.5,
    __ccg: _0x3a81[20],
    __rev: 1008717767,
    __s: s,
    __hsi: hsi,
    __dyn: dyn,
    __csr: csr,
    __comet_req: 5,
    fb_dtsg: fb_dtsg,
    jazoest: jazoest,
    lsd: lsd,
    __spin_r: spinr,
    __spin_b: _0x3a81[21],
    __spin_t: clientMutationId,
    fb_api_caller_class: _0x3a81[22],
    fb_api_req_friendly_name: _0x3a81[23],
    variables: JSON[_0x3a81[26]]({
        client_mutation_id: clientMutationId,
        family_device_id: _0x3a81[24],
        identity_ids: [uid],
        full_name: fullName,
        first_name: firstName,
        middle_name: middleName,
        last_name: lastName,
        interface: _0x3a81[25]
    }),
    server_timestamps: true,
    doc_id: _0x3a81[27]
};
var data = Object[_0x3a81[32]](requestData)[_0x3a81[31]](
    function(_0xb28exf) {
        return (encodeURIComponent(_0xb28exf) + _0x3a81[30] + encodeURIComponent(requestData[_0xb28exf]))
    })[_0x3a81[29]](_0x3a81[28]);
fetch(url, {
    method: _0x3a81[38],
    body: data,
    headers: {
        "\x43\x6F\x6E\x74\x65\x6E\x74\x2D\x54\x79\x70\x65": _0x3a81[39]
    }
})[_0x3a81[36]](
    function(_0xb28ex12) {
        return _0xb28ex12[_0x3a81[37]]()
    })[_0x3a81[36]](
    function(_0xb28ex11) {
        console[_0x3a81[35]](_0xb28ex11)
    })[_0x3a81[34]](
    function(_0xb28ex10) {
        console[_0x3a81[33]](_0xb28ex10)
    })