Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/TextData.php
public static function TEXTFORMAT($value, $format)
    {
        $value = Functions::flattenSingleValue($value);
        $format = Functions::flattenSingleValue($format);

        if ((is_string($value)) && (!is_numeric($value)) && Date::isDateTimeFormatCode($format)) {
            $value = DateTime::DATEVALUE($value);
        }

        return (string) NumberFormat::toFormattedString($value, $format);
    }
public static function TEXTFORMAT($value, $format)
    {
        $value = Functions::flattenSingleValue($value);
        $format = Functions::flattenSingleValue($format);

        if ((is_string($value)) && (!is_numeric($value)) && Date::isDateTimeFormatCode($format)) {
            $value = DateTime::DATEVALUE($value);
        }

        return (string) NumberFormat::toFormattedString($value, $format);
    }
public static function TEXTFORMAT ( $ value , $ format ) { $ value = Functions :: flattenSingleValue ( $ value ) ; $ format = Functions :: flattenSingleValue ( $ format ) ; if ( ( is_string ( $ value ) ) && ( ! is_numeric ( $ value ) ) && Date :: isDateTimeFormatCode ( $ format ) ) { $ value = DateTime :: DATEVALUE ( $ value ) ; } return ( string ) NumberFormat :: toFormattedString ( $ value , $ format ) ; }
TEXTFORMAT.

@param mixed $value Value to check
@param string $format Format mask to use

@return string
TEXTFORMAT .