Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Csv.php
private function writeLine($pFileHandle, array $pValues)
    {
        // No leading delimiter
        $writeDelimiter = false;

        // Build the line
        $line = '';

        foreach ($pValues as $element) {
            // Escape enclosures
            $element = str_replace($this->enclosure, $this->enclosure . $this->enclosure, $element);

            // Add delimiter
            if ($writeDelimiter) {
                $line .= $this->delimiter;
            } else {
                $writeDelimiter = true;
            }

            // Add enclosed string
            $line .= $this->enclosure . $element . $this->enclosure;
        }

        // Add line ending
        $line .= $this->lineEnding;

        // Write to file
        fwrite($pFileHandle, $line);
    }
private function writeLine($pFileHandle, array $pValues)
    {
        // No leading delimiter
        $writeDelimiter = false;

        // Build the line
        $line = '';

        foreach ($pValues as $element) {
            // Escape enclosures
            $element = str_replace($this->enclosure, $this->enclosure . $this->enclosure, $element);

            // Add delimiter
            if ($writeDelimiter) {
                $line .= $this->delimiter;
            } else {
                $writeDelimiter = true;
            }

            // Add enclosed string
            $line .= $this->enclosure . $element . $this->enclosure;
        }

        // Add line ending
        $line .= $this->lineEnding;

        // Write to file
        fwrite($pFileHandle, $line);
    }
Write line to CSV file.

@param resource $pFileHandle PHP filehandle
@param array $pValues Array containing values in a row