16 best PHP Encryption libraries in 2025

Build safer and secure applications in PHP with features like password hashing, secret key encryption, envelope encryption, password storage, whole-file cryptography, and more using PHP encryption libraries.

Essentially password encrypting in PHP works by hashing them with an appropriate password-hashing algorithm. The primary security functions offered by PHP encryption and cryptographic libraries include Symmetric and Asymmetric key authenticated encryption, anonymous encryption, digital signatures, cryptographic hash functions, RSA Encryption, RSA Signatures, and key decryption. Using these libraries, you can generate an ephemeral encryption key to encrypt your message with PHP symmetric-key encryption. And then, decrypt the ephemeral key with the correct RSA private key.

Check out the below list to find more trending PHP encryption libraries to add security functions to your applications:

The php-encryption library employs simple yet effective encryption methods. This library is extremely useful for securely encrypting data with a key or password in PHP.

libsodium is one of the world’s most reliable, cross-platform cryptography libraries. It offers numerous functionalities making it extremely popular among developers.

Halite is a comprehensive high-level cryptography library that offers all the functions of libsodium with a simple and intuitive interface.