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, PHP 8)
openssl_free_key — 释放密钥资源
说明
openssl_free_key(resource
$key_identifier): void
openssl_free_key() 从内存中释放和指定的
key_identifier相关联的密钥。
参数
-
key_identifier -
返回值
没有返回值。
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User Contributed Notes 3 notes
Lawri van Bul ¶
6 years ago
Richard Lynch ¶
10 years ago
openssl_free_key and openssl_pkey_free are probably aliases.
And the preferred one is probably openssl_pkey_free.
