src/SpdxLicenses.php
public function validate($license)
    {
        if (is_array($license)) {
            $count = count($license);
            if ($count !== count(array_filter($license, 'is_string'))) {
                throw new \InvalidArgumentException('Array of strings expected.');
            }
            $license = $count > 1  ? '(' . implode(' OR ', $license) . ')' : (string) reset($license);
        }

        if (!is_string($license)) {
            throw new \InvalidArgumentException(sprintf(
                'Array or String expected, %s given.',
                gettype($license)
            ));
        }

        return $this->isValidLicenseString($license);
    }
public function validate($license)
    {
        if (is_array($license)) {
            $count = count($license);
            if ($count !== count(array_filter($license, 'is_string'))) {
                throw new \InvalidArgumentException('Array of strings expected.');
            }
            $license = $count > 1  ? '(' . implode(' OR ', $license) . ')' : (string) reset($license);
        }

        if (!is_string($license)) {
            throw new \InvalidArgumentException(sprintf(
                'Array or String expected, %s given.',
                gettype($license)
            ));
        }

        return $this->isValidLicenseString($license);
    }
@param array|string $license

@throws \InvalidArgumentException

@return bool