pocketmine\nbt\NBT::putFloat PHP Method

    public function putFloat($v)
    {
        $this->buffer .= $this->endianness === self::BIG_ENDIAN ? Binary::writeFloat($v) : Binary::writeLFloat($v);
    }

 public function write(NBT $nbt)
 {
     $nbt->putFloat($this->value);
 }