Android Java Class to PHP

import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; import [login to view URL]; public class MainActivity extends AppCompatActivity { protected Map<String, Object> postArgs = new HashMap(); @Override protected void onCreate(Bundle savedInstanceState) { [login to view URL](savedInstanceState); setContentView(R.layout.activity_main); TextView err = (TextView) findViewById(R.id.hello_text); try { [login to view URL](generateSignature([login to view URL])); } catch (NoSuchAlgorithmException e) { [login to view URL](); } catch (JSONException e) { [login to view URL](); } catch (UnsupportedEncodingException e) { [login to view URL](); } } String json_string = "{\"country_version\":\"\",\"app_version\":1143,\"request_timestamp\":1526296840745,\"app_id\":\"[login to view URL]\",\"experiment_name\":\"browser_history_reporting\",\"hardware_id\":\"8052a17f75e496be\",\"instance_id\":\"3fd66651d6ab4d968109afdcd6fa7c21\"}"; public MainActivity() { [login to view URL]("country_version", ""); [login to view URL]("app_version", 1143); [login to view URL]("request_timestamp", "1526296840745"); [login to view URL]("app_id", "[login to view URL]"); [login to view URL]("experiment_name", "browser_history_reporting"); [login to view URL]("hardware_id", "8052a17f75e496be"); [login to view URL]("instance_id", "3fd66651d6ab4d968109afdcd6fa7c21"); } public JSONObject asJSON() throws JSONException { JSONObject root = new JSONObject(json_string); return root; } private String generateSignature(Map<String, Object> map) throws NoSuchAlgorithmException, JSONException, UnsupportedEncodingException { MessageDigest instance = [login to view URL]("SHA1"); updateHash(instance, asJSON()); byte[] digest = [login to view URL](); StringBuffer stringBuffer = new StringBuffer(); for (byte b : digest) { [login to view URL]([login to view URL]((b & 255) + 256, 16).substring(1)); } return [login to view URL](); } private void updateHash(MessageDigest messageDigest, JSONObject jSONObject) throws UnsupportedEncodingException, JSONException { JSONArray names = [login to view URL](); List<String> arrayList = new ArrayList(); for (int i = 0; i < [login to view URL](); i++) { [login to view URL]([login to view URL](i)); } [login to view URL](arrayList); for (String str : arrayList) { [login to view URL]([login to view URL]("UTF-8")); Object obj = [login to view URL](str); if (obj instanceof JSONObject) { updateHash(messageDigest, (JSONObject) obj); } else if (obj instanceof JSONArray) { updateHash(messageDigest, (JSONArray) obj); } else { [login to view URL]([login to view URL](obj).getBytes("UTF-8")); } } } private void updateHash(MessageDigest messageDigest, JSONArray jSONArray) throws JSONException, UnsupportedEncodingException { for (int i = 0; i < [login to view URL](); i++) { Object obj = [login to view URL](i); if (obj instanceof JSONObject) { updateHash(messageDigest, (JSONObject) obj); } else if (obj instanceof JSONArray) { updateHash(messageDigest, (JSONArray) obj); } else { [login to view URL]([login to view URL](obj).getBytes("UTF-8")); } } } }