I just checked the code for PHP 7.1 and in there openssl_free_key is an alias for opnessl_pkey_free (PHP_FALIAS).
This supports Richards assumption.
I would also suggest to not use the alias,
but use the openssl_pkey_free function in new code.
This is because it is more descriptive about what its intend is and is the same structure as similar function in the openssl section.
openssl_free_key
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
openssl_free_key — Free key resource
Description
openssl_free_key
( resource
$key_identifier
) : void
openssl_free_key() frees the key associated with
the specified key_identifier from memory.
Parameters
-
key_identifier -
Return Values
No value is returned.
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User Contributed Notes 2 notes
Lawri van Bul ¶
1 year ago
Richard Lynch ¶
6 years ago
openssl_free_key and openssl_pkey_free are probably aliases.
And the preferred one is probably openssl_pkey_free.
