(PHP 4 >= 4.2.0, PHP 5)
openssl_x509_export_to_file — Exports a certificate to file
openssl_x509_export_to_file() stores x509 into a file named by outfilename in a PEM encoded format.
Path to the output file.
The optional parameter notext affects the verbosity of the output; if it is FALSE then additional human-readable information is included in the output. The default value of notext is TRUE.
如果成功则返回 TRUE，失败则返回 FALSE。