(PHP 4 >= 4.2.0, PHP 5)
openssl_pkey_export_to_file — Gets an exportable representation of a key into a file
$key
, string $outfilename
[, string $passphrase
[, array $configargs
]] )
openssl_pkey_export_to_file() saves an ascii-armoured
(PEM encoded) rendition of key into the file named
by outfilename.
Note: 必须安装有有效的 openssl.cnf 以保证此函数正确运行. 参考 安装 的注释以获得更多信息.
key
outfilename
Path to the output file.
passphrase
The key can be optionally protected by a
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.