# Vtiful\Kernel\Excel::insertFormula

(PECL xlswriter >= 1.2.1)

Vtiful\Kernel\Excel::insertFormula — Vtiful\Kernel\Excel insertFormula

### Description

public Vtiful\Kernel\Excel::insertFormula ( int `$row` , int `$column` , string `$formula` )

Insert calculation formula.

### Parameters

`row`

  cell row

`column`

  cell column

`formula`

  formula string

### Return Values

Vtiful\Kernel\Excel instance

### Examples

Example #1 example

`<?php
$config = [
'path' => './tests'
];
$excel = new \Vtiful\Kernel\Excel($config);
$file = $excel->fileName("free.xlsx")
->header(['name', 'money']);
for($index = 1; $index < 10; $index++) {
$file->insertText($index, 0, 'viest');
$file->insertText($index, 1, 10);
}
$file->insertText(12, 0, "Total");
$file->insertFormula(12, 1, '=SUM(B2:B11)'); // insert formula
$file->output();`