<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\TextData;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
class CaseConvert
{
/**
* LOWERCASE.
*
* Converts a string value to upper case.
*
* @param mixed $mixedCaseValue The string value to convert to lower case
*/
public static function lower($mixedCaseValue): string
{
$mixedCaseValue = Functions::flattenSingleValue($mixedCaseValue);
$mixedCaseValue = Helpers::extractString($mixedCaseValue);
return StringHelper::strToLower($mixedCaseValue);
}
/**
* UPPERCASE.
*
* Converts a string value to upper case.
*
* @param mixed $mixedCaseValue The string value to convert to upper case
*/
public static function upper($mixedCaseValue): string
{
$mixedCaseValue = Functions::flattenSingleValue($mixedCaseValue);
$mixedCaseValue = Helpers::extractString($mixedCaseValue);
return StringHelper::strToUpper($mixedCaseValue);
}
/**
* PROPERCASE.
*
* Converts a string value to proper or title case.
*
* @param mixed $mixedCaseValue The string value to convert to title case
*/
public static function proper($mixedCaseValue): string
{
$mixedCaseValue = Functions::flattenSingleValue($mixedCaseValue);
$mixedCaseValue = Helpers::extractString($mixedCaseValue);
return StringHelper::strToTitle($mixedCaseValue);
}
}