01.<?php
02.
03. $gKey = 'welcometoapicodesdotcomthisiskey';
04.
05. function decode($pData)
06. {
07. global $gKey;
08.
09. $lData = str_replace(' ','+', $pData);
10.
11. $lBase64Decoded_Payload = base64_decode($lData);
12.
13. $lEncrypted_PlainText = substr($lBase64Decoded_Payload, 16);
14.
15. $lIV = substr($lBase64Decoded_Payload, 0, 16);
16.
17. $lDecrypted_PlainText = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $gKey, $lEncrypted_PlainText, MCRYPT_MODE_CBC, $lIV);
18.
19. $lBase64Decoded_PlainText = base64_decode($lDecrypted_PlainText);
20.
21. return $lBase64Decoded_PlainText;
22. }
23.
24. function encode($pData)
25. {
26. global $gKey;
27.
28. $lBase64Encoded_PlainText = base64_encode($pData);
29.
30. $lIV = GenerateIV();
31.
32. $lEncrypted_PlainText = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $gKey, $lBase64Encoded_PlainText, MCRYPT_MODE_CBC, $lIV);
33.
34. $lPayload = $lIV.$lEncrypted_PlainText;
35.
36. $lBase64Encoded_Payload = base64_encode($lPayload);
37.
38. return $lBase64Encoded_Payload;
39. }
40.
41. function GenerateIV()
42. {
43. $lIV = mcrypt_create_iv(16, MCRYPT_DEV_URANDOM);
44. while(strlen($lIV) < 16)
45. {
46. $lIV .= "\0";
47. }
48. return $lIV;
49. }
50.
51.?>
