What are some best practices for securely storing encryption keys in PHP applications?

Storing encryption keys securely in PHP applications is crucial to protect sensitive data. One best practice is to store encryption keys in a separate file outside of the web root directory to prevent direct access. Additionally, using encryption key management tools and techniques like key rotation can enhance security. 

define('ENCRYPTION_KEY', 'your_encryption_key_here');

Keywords

encryption keys secure storage PHP applications cryptography key management

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