src/FormBuilder.php
public function old($name)
    {
        return ! is_null($this->session)
            ? $this->session->getOldInput(self::transformKey($name))
            : null;
    }
public function old($name)
    {
        return ! is_null($this->session)
            ? $this->session->getOldInput(self::transformKey($name))
            : null;
    }
Get a value from the session's old input.

@param  string  $name

@return mixed