(PHP 4 >= 4.2.0, PHP 5)
openssl_x509_export — Exports a certificate as a string
   openssl_x509_export() stores
   x509 into a string named by
   output in a PEM encoded format.
  
x509See Key/Certificate parameters for a list of valid values.
outputOn success, this will hold the PEM.
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.