Я лично использовал её вот так:
local players = {}
local radius = 50
local posX, posY, posZ = getCharCoordinates(PLAYER_PED)
repeat
local result, ped = findAllRandomCharsInSphere(posX, posY, posZ, radius, true, true)
if result then
local _, id = sampGetPlayerIdByCharHandle(ped)...