if

 (

strspn

(

$text

, 

chr

(

$pad

), 

strlen

(

$text

) - 

$pad

) != 

$pad

) {

return

 false;

}

return

 

substr

(

$text

, 0, - 1 * 

$pad

);

}
}
 
 

//使用
include

('STD3Des.class.php');

$key

='abcdefgh';

$iv

='abcdefgh';

$msg

='test string';

$des

=

new

 STD3Des(

base64_encode

(

$key

),

base64_encode

(

$iv

));

$rs1

=

$des

->encrypt(

$msg

);

echo

 

$rs1

.'<br />';

$rs2

=

$des

->decrypt(

$rs1

);

echo

 

$rs2

;

.net 版本
代码如下:
 
sealed 

public

 

class

 CryptoHelper

{

/// <summary>
/// Encrypts the specified input.
/// </summary>
/// <param name="input">The input.</param>
/// <param name="key">key</param>
/// <param name="iv">iv</param>
/// <returns></returns>
public

 

static

 string EncryptDes(string input, byte[] key, byte[] iv)

{

if

 (input == null || input.Length == 0)

return

 String.

Empty

;

 
DESCryptoServiceProvider des = 

new

 DESCryptoServiceProvider();

MemoryStream ms = null;
CryptoStream encStream = null;
StreamWriter sw = null;
string result = String.

Empty

;