PHP Code:

<?php
	$source 	= 'Secret password.';
	$key 		= 'Private encryption key';
	$td 		= mcrypt_module_open(MCRYPT_BLOWFISH, '', MCRYPT_MODE_CBC, '');
	$iv 		= mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_DEV_RANDOM);	
	mcrypt_generic_init($td, $key, $iv);
	
	//Encrypt the data, returns as encrypted binary data
	$encrypted_source = mcrypt_generic($td, $source);
	
	//Decrypt the data, parse in binary encrypted data, returns plain text string
	$decrypted_source = mdecrypt_generic($td, $encrypted_source);
	
	mcrypt_generic_deinit($td);
	mcrypt_module_close($td);
?>

base64 | MD5 | SHA1 | SHA256 | AES 256 | Blowfish | 3DES