fputcsv double quote

csv.php

<?php

ini_set('error_reporting', E_ALL);
ini_set('display_errors', 1);

function fputcsv2($fp, $fields, $delimiter = ',', $enclosure = '"', $mysql_null = false) {
    $delimiter_esc = preg_quote($delimiter, '/');
    $enclosure_esc = preg_quote($enclosure, '/');

    $output = array();
    foreach ($fields as $field) {
        if ($field === null && $mysql_null) {
            $output[] = 'NULL';
            continue;
        }

        // original
        // $output[] = preg_match("/(?:${delimiter_esc}|${enclosure_esc}|\s)/", $field) ? (
        //     $enclosure . str_replace($enclosure, $enclosure . $enclosure, $field) . $enclosure
        // ) : $field;

        $output[] = preg_match("/(?:${delimiter_esc}|${enclosure_esc}|\s)/", $field) ? (
            $enclosure . str_replace($enclosure, $enclosure . $enclosure, $field) . $enclosure
        ) : "\"{$field}\"";
    }

    fwrite($fp, join($delimiter, $output) . "\n");
}


$array = array("Windows", "Mac", "Linux", '<table style="sdc">あいうえお
	</table>');


$fp = fopen("./test.csv", "w");
fputcsv2($fp, $array);
fclose($fp);

http://php.net/manual/ja/function.fputcsv.php

        $value = preg_match("/(?:${delimiter_esc}|${enclosure_esc}|\s)/", $field) ? (
            str_replace($enclosure, $enclosure . $enclosure, $field)
        ) : $field;
        $output[] = $enclosure . $value . $enclosure;