openssl_pkey_export

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

openssl_pkey_export — Gets an exportable representation of a key into a string

bool openssl_pkey_export ( mixed $key , string &$out [, string $passphrase [, array $configargs ]] )

openssl_pkey_export() exports key as a PEM encoded string and stores it into out (which is passed by reference).

Note: 必须安装有效的 openssl.cnf 以保证此函数正确运行。参考有关安装的说明以获得更多信息。

key
out
passphrase: The key is optionally protected by passphrase.
configargs: configargs can be used to fine-tune the export process by specifying and/or overriding options for the openssl configuration file. See openssl_csr_new() for more information about configargs.

成功时返回 TRUE，或者在失败时返回 FALSE。