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Exemplos
GnuPG
PHP Manual

# Constantes pré-definidas

`GNUPG_SIG_MODE_NORMAL` ( integer )
`GNUPG_SIG_MODE_DETACH` ( integer )
`GNUPG_SIG_MODE_CLEAR` ( integer )
`GNUPG_VALIDITY_UNKNOWN` ( integer )
`GNUPG_VALIDITY_UNDEFINED` ( integer )
`GNUPG_VALIDITY_NEVER` ( integer )
`GNUPG_VALIDITY_MARGINAL` ( integer )
`GNUPG_VALIDITY_FULL` ( integer )
`GNUPG_VALIDITY_ULTIMATE` ( integer )
`GNUPG_PROTOCOL_OpenPGP` ( integer )
`GNUPG_PROTOCOL_CMS` ( integer )
`GNUPG_SIGSUM_VALID` ( integer )
`GNUPG_SIGSUM_GREEN` ( integer )
`GNUPG_SIGSUM_RED` ( integer )
`GNUPG_SIGSUM_KEY_REVOKED` ( integer )
`GNUPG_SIGSUM_KEY_EXPIRED` ( integer )
`GNUPG_SIGSUM_KEY_MISSING` ( integer )
`GNUPG_SIGSUM_SIG_EXPIRED` ( integer )
`GNUPG_SIGSUM_CRL_MISSING` ( integer )
`GNUPG_SIGSUM_CRL_TOO_OLD` ( integer )
`GNUPG_SIGSUM_BAD_POLICY` ( integer )
`GNUPG_SIGSUM_SYS_ERROR` ( integer )
`GNUPG_ERROR_WARNING` ( integer )
`GNUPG_ERROR_EXCEPTION` ( integer )
`GNUPG_ERROR_SILENT` ( integer )

Tipos Resource
Exemplos
GnuPG
PHP Manual