(PHP 5 >= 5.2.2)
openssl_pkcs12_export — Exports a PKCS#12 Compatible Certificate Store File to variable.
openssl_pkcs12_export() stores x509 into a string named by out in a PKCS#12 file format.
On success, this will hold the PKCS#12.
Private key component of PKCS#12 file.
Encryption password for unlocking the PKCS#12 file.
如果成功则返回 TRUE，失败则返回 FALSE。