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<?php
/**
 * Content-Dispositionヘッダの値をタイプによって作成する
 * @param $type
 * @param $fileName
 * @return string
 */
function createContentDisposition($type, $fileName) {
    $result = '';
    switch($type) {
        case 'UTF-8 Raw' :
            $result = 'attachment; filename="' . $fileName . '"';
            break;
        case 'UTF-8 URL Encoded' :
            $result = 'attachment; filename="' . rawurlencode($fileName) . '"';
            break;
        case 'UTF-8 Base64 Encoded' :
            $result = 'attachment; filename="=?utf-8?B?' . base64_encode($fileName). '?="';
            break;
        case 'RFC 5987' :
            $result = 'attachment; filename*=UTF-8\'\'' . rawurlencode($fileName);
            break;
        case 'Shift_JIS Raw' :
            $result = 'attachment; filename="' . mb_convert_encoding($fileName, 'Shift_JIS', 'UTF-8') . '"';
            break;
        case 'Shift_JIS URL Encoded' :
            $result = 'attachment; filename="' . rawurlencode(mb_convert_encoding($fileName, 'Shift_JIS', 'UTF-8')) . '"';
            break;
    }
    return $result;
}