Filesystem/CsvResource.php
public function readRaw($length = null)
    {
        $this->assertOpened();
        ++$this->currentLine;

        return fgetcsv($this->handler, $length, $this->delimiter, $this->enclosure, $this->escape);
    }
public function readRaw($length = null)
    {
        $this->assertOpened();
        ++$this->currentLine;

        return fgetcsv($this->handler, $length, $this->delimiter, $this->enclosure, $this->escape);
    }
Warning, this function will return exactly the same value as the fgetcsv() function.

@param null|int $length

@throws \RuntimeException

@return array|false