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# openssl_free_key

(PHP 4 >= 4.0.4)

openssl_free_key -- Free key resource

## Description

``void openssl_free_key` (resource key_identifier)`

Warning
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change in a future release of PHP without notice. Be warned and use this function at your own risk.

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

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