PHP，Excel導出換行

// 有id，才算真的有發票數據
if ($v['b_invoice_id']) {
    $v['b_invoice_info'] = json_decode($v['b_invoice_json'],true);
    $v['b_invoice_str'] .= '類型:';
    if ((int)$v['b_invoice_purchase'] === 1) { $v['b_invoice_str'] .='(收購)'; }
    if ((int)$v['b_invoice_info']['type'] === 1) { $v['b_invoice_str'] .='普通發票'; } else { $v['b_invoice_str'] .= '專用發票'; }
    $v['b_invoice_str'] .= "\r\n公司名稱/姓名:";
    $v['b_invoice_str'] .= $v['b_invoice_info']['company_name'];
    $v['b_invoice_str'] .= "\r\n識別號/身份證:";
    $v['b_invoice_str'] .= $v['b_invoice_info']['company_tax'];
    $v['b_invoice_str'] .= "\r\n電話:";
    $v['b_invoice_str'] .= $v['b_invoice_info']['company_telephone']?:'無';
    $v['b_invoice_str'] .= "\r\n地址:";
    $v['b_invoice_str'] .= $v['b_invoice_info']['company_address']?:'無';
    $v['b_invoice_str'] .= "\r\n開戶行:";
    $v['b_invoice_str'] .= $v['b_invoice_info']['company_bank']?:'無';
    $v['b_invoice_str'] .= "\r\n開戶賬號:";
    $v['b_invoice_str'] .= $v['b_invoice_info']['company_account']?:'無';
} else {
    $v['b_invoice_info'] = [];
}
if ($v['c_invoice_id']) {
    $v['c_invoice_info'] = json_decode($v['c_invoice_json'],true);
    $v['c_invoice_str'] .= '類型:';
    if ((int)$v['c_invoice_info']['type'] === 1) { $v['c_invoice_str'] .='普通發票'; } else { $v['c_invoice_str'] .= '專用發票'; }
    $v['c_invoice_str'] .= "\r\n公司名稱:";
    $v['c_invoice_str'] .= $v['c_invoice_info']['company_name'];
    $v['c_invoice_str'] .= "\r\n識別號:";
    $v['c_invoice_str'] .= $v['c_invoice_info']['company_tax'];
    $v['c_invoice_str'] .= "\r\n電話:";
    $v['c_invoice_str'] .= $v['c_invoice_info']['company_telephone']?:'無';
    $v['c_invoice_str'] .= "\r\n地址:";
    $v['c_invoice_str'] .= $v['c_invoice_info']['company_address']?:'無';
    $v['c_invoice_str'] .= "\r\n開戶行:";
    $v['c_invoice_str'] .= $v['c_invoice_info']['company_bank']?:'無';
    $v['c_invoice_str'] .= "\r\n開戶賬號:";
    $v['c_invoice_str'] .= $v['c_invoice_info']['company_account']?:'無';
}

\r\n
必須是雙引號。