<function name="SendToServer" parent="net" type="libraryfunc"> <description>Sends the current net message (see <page>net.Start</page>) to the server. <description>Sends the current net message (see <page>net.Start</page>) to the server. The player object must exist on the server for the net message to be received successfully by the server. <warning>Each net message has a length limit of 65,533 bytes (approximately 64 KiB) and your net message will error and fail to send if it is larger than this. The message name must be pooled with <page>util.AddNetworkString</page> beforehand!</warning> </description> <realm>Client</realm> </function> <example> <description>Sends a simple `hello_world` message with the string `Hi` to the server</description>⤶ <description>Sends a simple `hello_world` message with the string `Hi` to the server as soon as possible after joining the game.</description>⤶ <code> if ( SERVER ) then util.AddNetworkString( "hello_world" ) util.AddNetworkString( "hello_world" ) net.Receive( "hello_world", function( len, ply ) print( len, ply, net.ReadString() ) end ) else net.Start( "hello_world" ) net.WriteString( "Hi" )⤶ net.SendToServer() hook.Add("OnEntityCreated", "SendMessageToServer", function(ent) if ( ent != LocalPlayer() ) then return end⤶ net.Start( "hello_world" ) net.WriteString( "Hi" )⤶ net.SendToServer()⤶ hook.Remove( "InitPostEntity", "SendMessageToServer" )⤶ end)⤶ end </code> <output> The network message `hello_world` is sent to the server. The server can handle this with <page>net.Receive</page>. Remember that **any** client has the potential to send any net message at any time. **Don't trust the client-side!** On your server-side <page>net.Receive</page>, make sure to verify the message sender's permissions whenever you can and prevent expensive functions from being run too often. </output> </example>