将数组转换为csv

我正在使用以下功能；它是对fputscsv注释中的man条目之一的改编。而且您可能想要展平该数组；不知道如果您传递一个多维的行会发生什么。

function arrayToCsv( array &$fields, $delimiter = ';', $enclosure = '"', $encloseAll = false, $nullToMysqlNull = false ) {    $delimiter_esc = preg_quote($delimiter, '/');    $enclosure_esc = preg_quote($enclosure, '/');    $output = array();    foreach ( $fields as $field ) {        if ($field === null && $nullToMysqlNull) { $output[] = 'NULL'; continue;        }        // Enclose fields containing $delimiter, $enclosure or whitespace        if ( $encloseAll || preg_match( "/(?:${delimiter_esc}|${enclosure_esc}|s)/", $field ) ) { $output[] = $enclosure . str_replace($enclosure, $enclosure . $enclosure, $field) . $enclosure;        }        else { $output[] = $field;        }    }    return implode( $delimiter, $output );}