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<openssl_error_stringopenssl_get_cert_locations>
^OpenSSL FunctionsLast updated: Mon, 26 Oct 2026

openssl_free_key

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

openssl_free_key — Free key resource

Warning

This function has been DEPRECATED as of PHP 8.0.0. Relying on this function is highly discouraged.

Description

#[\Deprecated(
    since: '8.0',
    message: 'as OpenSSLAsymmetricKey objects are freed automatically',
)]
function openssl_free_key(OpenSSLAsymmetricKey $key): void

openssl_free_key() frees the key associated with the specified key from memory.

Parameters

key

Return Values

No value is returned.

Changelog

Version Description
8.0.0 This function is now deprecated as it doesn't have an effect anymore.
8.0.0 key accepts an OpenSSLAsymmetricKey now; previously, a resource of type OpenSSL key was accepted.

<openssl_error_stringopenssl_get_cert_locations>
^OpenSSL FunctionsLast updated: Mon, 26 Oct 2026