本文章分享的这个php加密类是一个可以支持中文和英文的可加密码可解密的php实现类文件,有需要的同学可以参考一下,不过最好把文档编码设置为utf-8.

下面代码保存成MD5Crypt.class.php文件,代码如下:

1. <?php
2. class MD5Crypt {
3. /**
4. * Enter description here ...
5. * @param unknown_type $str
6. * @return string
7. */
8. public final static function mdsha($str) {
9. $code = substr ( md5 ( $str ), 10 );
10. $code .= substr ( sha1 ( $str ), 0, 28 );
11. $code .= substr ( md5 ( $str ), 0, 22 );
12. $code .= substr ( sha1 ( $str ), 16 ) . md5 ( $str );
13. return self::chkToken () ? $code : null;
14. }
15. /**
16. * Enter description here ...
17. * @param unknown_type $param
18. */
19. private final static function chkToken() {
20. return true;
21. }
22. /**
23. * Enter description here ...
24. * @param unknown_type $txt
25. * @param unknown_type $encrypt_key
26. * @return Ambigous <string, boolean>
27. */
28. private final static function keyED($txt, $encrypt_key) {
29. $encrypt_key = md5 ( $encrypt_key );
30. $ctr = 0;
31. $tmp = "";
32. for($i = 0; $i < strlen ( $txt ); $i ++) {
33. if ($ctr == strlen ( $encrypt_key ))
34. $ctr = 0;
35. $tmp .= substr ( $txt, $i, 1 ) ^ substr ( $encrypt_key, $ctr, 1 );
36. $ctr ++;
37. }
38. return $tmp;
39. }
40. /**
41. * Enter description here ...
42. * @param unknown_type $txt
43. * @param unknown_type $key
44. * @return string
45. */
46. public final static function Encrypt($txt, $key) {
47. srand ( ( double ) microtime () * 1000000 );
48. $encrypt_key = md5 ( rand ( 0, 32000 ) );
49. $ctr = 0;
50. $tmp = "";
51. for($i = 0; $i < strlen ( $txt ); $i ++) {
52. if ($ctr == strlen ( $encrypt_key ))
53. $ctr = 0;
54. $tmp .= substr ( $encrypt_key, $ctr, 1 ) . (substr ( $txt, $i, 1 ) ^ substr ( $encrypt_key, $ctr, 1 ));
55. $ctr ++;
56. }
57. $_code = md5 ( $encrypt_key ) . base64_encode ( self::keyED ( $tmp, $key ) ) . md5 ( $encrypt_key . $key );
58. return self::chkToken () ? $_code : null;
59. }
60. /**
61. * Enter description here ...
62. * @param unknown_type $txt
63. * @param unknown_type $key
64. * @return Ambigous <string, boolean>
65. */
66. public final static function Decrypt($txt, $key) {
67. $txt = self::keyED ( base64_decode ( substr ( $txt, 32, - 32 ) ), $key );
68. $tmp = "";
69. for($i = 0; $i < strlen ( $txt ); $i ++) {
70. $md5 = substr ( $txt, $i, 1 );
71. $i ++;
72. $tmp .= (substr ( $txt, $i, 1 ) ^ $md5);
73. } //开源代码phpfensi.com
74. return self::chkToken () ? $tmp : null;
75. }
76. /**
77. * Enter description here ...
78. * @var unknown_type
79. */
80. private static $_key = 'lau';
81. }
82. ?>

用法,代码如下:

1. <?php //Code Start
2. define ( 'WORKSPACE', '.' . DIRECTORY_SEPARATOR );
3. header ( "Content-Type: text/html; charset=utf-8" );
4. include_once 'Core/Library/MD5Crypt.class.php';
5. $a = MD5Crypt::Encrypt ( "A", 100 );
6. echo "EnCode:" . $a, "<br />";
7. echo "DeCode:" . MD5Crypt::Decrypt ( $a, 100 );
8. ?>