PHP Manual: Perform signing operation on a textual data, return cleartext signed message

stringfalse rnp_op_sign_cleartext(
    RnpFFI $ffi,
    string $data,
    array $keys_fp,
    array $options = ?
)

ffi

The FFI object returned by rnp_ffi_create.

data

Data to be signed.

keys_fp

Array with key fingerprints. At least one key must be provided. Keys should be present in ffi.

options

An associative array with options.

Key	Data type	Description
`"armor"`	boolean	Enable ASCII-armored output. Disabled by default.
`"hash"`	string	Set hash algorithm used during signature calculation.
`"creation_time"`	integer	Set signature creation time in seconds since Jan, 1 1970 UTC. By default current time is used.
`"expiration_time"`	integer	Set signature expiration time in seconds since the creation time. 0 value is used to mark signature as non-expiring (default value).

Cleartext signed message containing source data with additional headers and ASCII-armored signature on success or false on failure.