/**
* LOWERCASE
*
* Converts a string value to upper case.
*
* @param string $mixedCaseString
* @return string
*/
public static function LOWERCASE($mixedCaseString)
{
$mixedCaseString = PHPExcel_Calculation_Functions::flattenSingleValue($mixedCaseString);
if (is_bool($mixedCaseString)) {
$mixedCaseString = $mixedCaseString ? PHPExcel_Calculation::getTRUE() : PHPExcel_Calculation::getFALSE();
}
return PHPExcel_Shared_String::StrToLower($mixedCaseString);
}
