On Linux (PHP5.6), this function will overwrite an existing keyfile, unless the keyfile is marked as read-only, in which case you will get an error:
error:0200100D:system library:fopen:Permission denied
openssl_pkey_export_to_file
(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
Description
openssl_pkey_export_to_file(
OpenSSLAsymmetricKey|OpenSSLCertificate|array|string
string
?string
?array
): bool
OpenSSLAsymmetricKey|OpenSSLCertificate|array|string
$key,string
$output_filename,?string
$passphrase = null,?array
$options = null): bool
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.
Parameters
-
key -
-
output_filename -
Path to the output file.
-
passphrase -
The key can be optionally protected by a
passphrase. -
options -
optionscan 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 aboutoptions.
Return Values
Returns true on success or false on failure.
Changelog
| 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.
|
add a note
User Contributed Notes 2 notes
StampyCode ¶
8 years ago
