openssl_pkcs7_decrypt Decrypts an S/MIME encrypted message boolopenssl_pkcs7_decrypt stringinfilename stringoutfilename mixedrecipcert mixedrecipkey Decrypts the S/MIME encrypted message contained in the file specified by infilename using the certificate and its associated private key specified by recipcert and recipkey. The decrypted message is output to the file specified by outfilename ]]>