Descriptionbool openssl_x509_export_to_file ( mixed x509, string outfilename [, bool notext])
openssl_x509_export_to_file() stores x509 into a file named by outfilename in a PEM encoded format.
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。