The PHP Simple Encryption library is designed to simplify the process of encrypting and decrypting data while ensuring best practices are followed. By default is uses a secure encryption algorithm and generates a cryptologically strong initialization vector so developers do not need to becomes exper

1.0.7 2021-08-30 13:38 UTC

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Last update: 2021-10-30 14:07:03 UTC


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PHP Simple Encryption (php-simple-encryption)

A PHP library that makes encryption and decryption of text easy.


  • PHP 7.2+
  • Openssl PHP extension


Simply add a dependency on stymiee/php-simple-encryption to your project's composer.json file if you use Composer to manage the dependencies of your project.

Here is a minimal example of a composer.json file that just defines a dependency on PHP Simple Encryption:

    "require": {
        "stymiee/php-simple-encryption": "^1"

Basic Usage

To get a more detailed introduction to this library, visit the PHP Simple Encryption tutorial on my blog.


use Encryption\Encryption;
use Encryption\Exception\EncryptionException;

$text = 'The quick brown fox jumps over the lazy dog';
$key  = 'secretkey';
try {
    $encryption = Encryption::getEncryptionObject();
    $iv = $encryption->generateIv();
    $encryptedText = $encryption->encrypt($text, $key, $iv);
    $decryptedText = $encryption->decrypt($encryptedText, $key, $iv);

    printf('Cipher   : %s%s', $encryption->getName(), PHP_EOL);
    printf('Encrypted: %s%s', $encryptedText, PHP_EOL);
    printf('Decrypted: %s%s', $decryptedText, PHP_EOL);
    printf('Version  : %s%s', Encryption::VERSION, PHP_EOL);
catch (EncryptionException $e) {
    echo $e;


Cipher   : AES-256-CBC
Encrypted: lierDqV4Qo3Cm87YU01K+YnQsDGrFsYypjHJVZaagqfLFg7xb2T7b9qfqb4NcoIGcTzqvQbOx72AVgbuRFxqgg==
Decrypted: The quick brown fox jumps over the lazy dog
Version  : 1

An exception may be thrown if:

  • An invalid/unsupported cipher is attempted to be used (Encryption\Exception\InvalidCipherException)
  • A cipher available in openssl but yet implemented is attempted to be used (Encryption\Exception\CipherNotImplementedException)
  • generateIv() is unable to generate a initialization vector (Encryption\Exception\GenerateIvException).
  • Encryption::encrypt() is unable to encrypt the data (Encryption\Exception\EncryptException).
  • Encryption::decrypt() is unable to decrypt the data (Encryption\Exception\DecryptException).

Supported Ciphers

The PHP Simple Encryption library currently defaults to AES-256-CBC. This may change in future versions and will result in a major version bump when this occurs. You can check the version of your library by calling Encryption::VERSION. This library is currently on version "1".

To determine what cipher you are using you can call the getName() method on your encryption object.

$encryption = Encryption::getEncryptionObject();
$cipherName = $encryption->getName(); // AES-256-CBC

To get a list of ciphers supported by your system and this library you can call Encryption::listAvailableCiphers() to receive an array of available ciphers. This list is an intersection of available ciphers from your system's installed version of Openssl and ciphers supported by this library.

Total ciphers supported: 139
Default cipher: AES-256-CBC (version 1)

AES Aria/Blowfish Camellia/Cast5/SM4 DES/Idea/RC2/RC4/Seed
aes-128-cbc aria-128-cbc camellia-128-cbc des-cbc
aes-128-cbc-hmac-sha1 aria-128-ccm camellia-128-cfb des-cfb
aes-128-cbc-hmac-sha256 aria-128-cfb camellia-128-cfb des-cfb1
aes-128-ccm aria-128-cfb1 camellia-128-cfb des-cfb8
aes-128-cfb aria-128-cfb8 camellia-128-ctr des-ecb
aes-128-cfb1 aria-128-ctr camellia-128-ecb des-ede
aes-128-cfb8 aria-128-ecb camellia-128-ofb des-ede3
aes-128-ctr aria-128-gcm camellia-192-cbc des-ede-cbc
aes-128-ecb aria-128-ofb camellia-192-cfb des-ede-cfb
aes-128-gcm aria-192-cbc camellia-192-cfb des-ede-ofb
aes-128-ofb aria-192-ccm camellia-192-cfb des-ede3-cbc
aes-128-xts aria-192-cfb camellia-192-ctr des-ede3-cfb
aes-192-cbc aria-192-cfb1 camellia-192-ecb des-ede3-cfb1
aes-192-ccm aria-192-cfb8 camellia-192-ofb des-ede3-cfb8
aes-192-cfb aria-192-ctr camellia-256-cbc des-ede3-ofb
aes-192-cfb1 aria-192-ecb camellia-256-cfb des-ofb
aes-192-cfb8 aria-192-gcm camellia-256-cfb desx-cbc
aes-192-ctr aria-192-ofb camellia-256-cfb id-aes128-ccm
aes-192-ecb aria-256-cbc camellia-256-ctr id-aes128-gcm
aes-192-gcm aria-256-ccm camellia-256-ecb id-aes192-ccm
aes-192-ofb aria-256-cfb camellia-256-ofb id-aes192-gcm
aes-256-cbc aria-256-cfb1 cast5-cbc id-aes256-ccm
aes-256-cbc-hmac-sha1 aria-256-cfb8 cast5-cfb id-aes256-gcm
aes-256-cbc-hmac-sha256 aria-256-ctr cast5-ecb idea-cbc
aes-256-ccm aria-256-ecb cast5-ofb idea-cfb
aes-256-cfb aria-256-gcm chacha20 idea-ecb
aes-256-cfb1 aria-256-ofb chacha20-poly1305 idea-ofb
aes-256-cfb8 bf-cbc seed-cbc rc2-40-cbc
aes-256-ctr bf-cfb seed-cfb rc2-64-cbc
aes-256-ecb bf-ecb seed-ecb rc2-cbc
aes-256-gcm bf-ofb seed-ofb rc2-cfb
aes-256-ofb sm4-cbc rc2-ecb
aes-256-xts sm4-cfb rc2-ofb
sm4-ctr rc4
sm4-ecb rc4-40


If the text to be encrypted contains trailing null characters they will be removed when decrypting those values.

Some ciphers may not work on your version of PHP. The newer your version of PHP (and its openssl extension), the more ciphers that will be available to you.


If you require assistance using this library start by viewing the file included in this package. It includes common problems and their solutions.

If you need additional assistance, I can be found at Stack Overflow. Be sure when you ask a question pertaining to the usage of this library be sure to tag your question with the PHP and encryption tags. Make sure you follow their guide for asking a good question as poorly asked questions will be closed, and I will not be able to assist you.

A good question will include all the following:

  • A description of the problem (what are you trying to do? what results are you expecting? what results are you actually getting?)
  • The code you are using (only post the relevant code)
  • Your unencrypted text
  • The key you are using
  • The IV you are using
  • The output of your method call(s)
  • Any error message(s) you are getting

Do not use Stack Overflow to report bugs. Bugs may be reported here.