Spawn Mob Entity

Hi guys , I have some problems with spawning Enderman Entity(I want to spawn Enderman that follows command sender)

Look at Slapper's source code.

There is no AI so, the enderman would just stand there...

PHP:

$nbt =  new Compound("",[
            new Enum("Pos",[
                new Double("",$player->x),
                new Double("",$player->y),
                new Double("",$player->z),
                ]),
            new Enum("Motion", [
                new Double("",0),
                new Double("",0),
                new Double("",0),
                ]),
            new Enum("Rotation",[
                new Float("",$player->yaw),
                new Float("",$player->pitch),
                ])
            ]);
$level->createEntity("Enderman",$player->chunk, $nbt)->spawnToAll();