(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.
  
x509See Key/Certificate parameters for a list of valid values.
outfilenamePath to the output file.
notext
 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.
   Returns TRUE on success or FALSE on failure.