A Reversible Encryption Routine for PHP

By Tony Marston
2005-04-15

Using the Encryption Class

In order to use this class you must first include/require the file containing the class definition and then create an object or instance of the class.

require 'std.encryption.class.inc';

$crypt = new Encryption;

To encrypt a string you must supply the string and a key. The string length is optional. Note that before you write this to your database you should use the addslashes() command to deal with any special characters.

$encrypt_result = $crypt->encrypt($key, $password, $pswdlen);

$errors = $crypt->errors;

To decrypt a string you must supply the string and the key that was used to encrypt it.

$decrypt_result = $crypt->decrypt($key, $password);

$errors = $crypt->errors;

Tutorial Pages:
» A Reversible Encryption Routine for PHP
» Rotating each character a fixed number of positions
» Swapping between two different character strings
» Manipulating the index number between the two strings
» Customising the Encryption Algorithm
» Class Variables
» Class Constructor
» The ConvertKey function
» The ApplyFudgeFactor function
» The CheckRange Function
» The Decrypt function
» Using the Encryption Class
» Summary

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