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ESXserver

ESX.RegisterServerCallback

ESX server documentation with a FiveM Lua example.

Summary

Registers a server callback in ESX that clients can call and await a value from — ESX's request/response pattern.

Returns

void

Parameters

namestringThe callback name.
handlerfunctionfunction(source, cb, ...) — call cb(result) to respond.

Example

-- SERVER
ESX.RegisterServerCallback('myscript:getMoney', function(source, cb)
  local xPlayer = ESX.GetPlayerFromId(source)
  cb(xPlayer.getMoney())
end)

-- CLIENT
ESX.TriggerServerCallback('myscript:getMoney', function(money)
  print(money)
end)

Common pitfalls

  • Always call cb() exactly once or the client waits forever.
  • Validate the source server-side; callbacks cross the network boundary.

Related functions

ESX.GetPlayerFromIdQBCore.Functions.CreateCallback

Related guides

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