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<Vtiful\Kernel\Format::italicProcess Control Extensions>
^Vtiful\Kernel\FormatLast updated: Mon, 26 Oct 2026

Vtiful\Kernel\Format::underline

(PECL xlswriter >= 1.2.1)

Vtiful\Kernel\Format::underline — Vtiful\Kernel\Format underline

Description

public function Vtiful\Kernel\Format::underline(resource $handle, int $style)

Vtiful\Kernel\Format underline format

Parameters

handle

xlsx file handle

style

Vtiful\Kernel\Format constant

Return Values

Resource

Examples

Example #1 Underline style example

<?php
$config = [
    'path' => './tests'
];

$excel = new \Vtiful\Kernel\Excel($config);
$excel->fileName('tutorial01.xlsx');

$format = new \Vtiful\Kernel\Format($excel->getHandle());
$underlineStyle = $format->underline(\Vtiful\Kernel\Format::UNDERLINE_SINGLE)->toResource();

$excel->header(['name', 'age'])
    ->data([['viest', 21]])
    ->setColumn('A:A', 200, $underlineStyle)
    ->output();
?>

<Vtiful\Kernel\Format::italicProcess Control Extensions>
^Vtiful\Kernel\FormatLast updated: Mon, 26 Oct 2026