(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
openssl_pkey_export_to_file — Gets an exportable representation of a key into a file
$key
,$output_filename
,$passphrase
= null
,$options
= null
openssl_pkey_export_to_file() saves an ascii-armoured (PEM encoded) rendition of key
into the file named by output_filename
.
Note: You need to have a valid openssl.cnf installed for this function to operate correctly. See the notes under the installation section for more information.
key
output_filename
Path to the output file.
passphrase
The key can be optionally protected by a passphrase
.
options
options
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 options
.
Version | Description |
---|---|
8.0.0 | key accepts an OpenSSLAsymmetricKey or OpenSSLCertificate instance now; previously, a resource of type OpenSSL key or OpenSSL X.509 was accepted. |