How to use the PHP openssl_decrypt function.

1 year ago
Isabella Edwards
1 minute

In PHP, you can utilize the openssl_decrypt function to decrypt encrypted data. The basic syntax of this function is as follows:

string openssl_decrypt ( string $data , string $method , string $key [, int $options = 0 [, string $iv = "" [, string $tag = "" [, string $aad = "" [, int $tag_length = 16 ]]]]] )

Explanation of parameters:

  1. Data: Data to decrypt.
  2. encryption algorithm
  3. key: the key needed for decryption
  4. encryption option (optional, default is 0)
  5. iv: Initialization vector (optional, default is an empty string)
  6. tag: Certification label (optional, default is an empty string)
  7. aad: Additional authentication data (optional, default is an empty string)
  8. tag_length: Length of authentication tag (optional, default is 16).

I am unable to attend the meeting because I have a prior commitment. -> I can’t make it to the meeting because I already have something else scheduled.

$encrypted_data = "U2FsdGVkX1+m3l8g5dO/TDCBQZgZ6QwH9L3soBUXKo=";
$key = "mysecretkey";
$method = "AES-256-CBC";
$decrypted_data = openssl_decrypt($encrypted_data, $method, $key, 0, "1234567890123456");

echo $decrypted_data;

In the example above, we decrypt the encrypted data using the AES-256-CBC algorithm and the key “mysecretkey”. We also provide a 16-byte initialization vector. The decrypted data will be stored in the variable $decrypted_data.

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