Generates a ULID (Universally Unique Lexicographically Sortable Identifier), a 128-bit identifier where the first 48 bits are a timestamp representing milliseconds since the Unix Epoch (1970-01-01), ensuring temporal ordering. The remaining 80 bits are populated by a secure random number generator, contributing to the identifier's uniqueness. The output is a 26-character string in its canonical representation. This function can operate in three modes specified by the 'type' argument: 'empty' for standard ULID generation, 'monotonic' to ensure sequential IDs even in rapid succession, and 'hash' to generate a ULID based on hashed input values.

createulid( type=string, input1=number, input2=string );

Returns: String

Argument Description Default
string, optional

Specifies the generation mode of the ULID. If not defined, a standard ULID is generated. 'monotonic' ensures ULIDs increase monotonically, suitable for ensuring order in rapid generation scenarios. 'hash' mode generates a ULID based on hashing the provided inputs, useful for creating deterministic identifiers.

number, optional

Used in conjunction with the 'hash' type, this numeric input contributes to the generation of a deterministic ULID by influencing its random component.

string, optional

Similar to 'input1', this string input is utilized only in the 'hash' mode to further seed the ULID's random component, enabling the creation of a deterministic ULID based on the hash of the inputs.


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See also