(PHP 5 >= 5.2.2)
openssl_pkcs12_export_to_file — Exports a PKCS#12 Compatible Certificate Store File
openssl_pkcs12_export_to_file() stores x509 into a file named by filename in a PKCS#12 file format.
See Key/Certificate parameters for a list of valid values.
Path to the output file.
Private key component of PKCS#12 file.
Encryption password for unlocking the PKCS#12 file.
Returns TRUE on success or FALSE on failure.