Counts.php

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<?php

namespace PhpOffice\PhpSpreadsheet\Calculation\Statistical;

use PhpOffice\PhpSpreadsheet\Calculation\Functions;

class Counts extends AggregateBase
{
    public static function COUNT(...$args)
    {
        $returnValue = 0;

        // Loop through arguments
        $aArgs = Functions::flattenArrayIndexed($args);
        foreach ($aArgs as $k => $arg) {
            $arg = self::testAcceptedBoolean($arg, $k);
            // Is it a numeric value?
            // Strings containing numeric values are only counted if they are string literals (not cell values)
            //    and then only in MS Excel and in Open Office, not in Gnumeric
            if (self::isAcceptedCountable($arg, $k)) {
                ++$returnValue;
            }
        }

        return $returnValue;
    }

    public static function COUNTA(...$args)
    {
        $returnValue = 0;

        // Loop through arguments
        $aArgs = Functions::flattenArrayIndexed($args);
        foreach ($aArgs as $k => $arg) {
            // Nulls are counted if literals, but not if cell values
            if ($arg !== null || (!Functions::isCellValue($k))) {
                ++$returnValue;
            }
        }

        return $returnValue;
    }

    public static function COUNTBLANK(...$args)
    {
        $returnValue = 0;

        // Loop through arguments
        $aArgs = Functions::flattenArray($args);
        foreach ($aArgs as $arg) {
            // Is it a blank cell?
            if (($arg === null) || ((is_string($arg)) && ($arg == ''))) {
                ++$returnValue;
            }
        }

        return $returnValue;
    }
}