how to encryption and decryption variable in php

[rahia307]

hi

i wan to encrypt variable and again decrypt. how can i do this if any body have idea about it please help me.

[code green]

Have you never watched spy films.
You need an encryption key or primer I think in US.
PHP has encryption functions md5() and sha1() but you cannot de-crypt otherwise they would be useless.
So you need a user defined algorithm which is your encrption key.
This can be anything your imagination allows.
Have fun

[Atli]

You could always use the base64_encode and base64_decode functions. But they really are no more secure than plain text.
Totally useless from a security point of view. They exist mostly to encode binary data before sending them through mail bodies and such.

[mikeschroeder]

If you need two way encryption for storing sensitive data or something of the sorts, you could always use the OpenSSL support in php. http://php.net/openssl

This site has a lot of different examples of the usage:

http://www.mobilefish.com/developer/php/php_quickguide_openssl.html