src/Fixer/Comment/NoEmptyCommentFixer.php
private function isEmptyComment($content)
    {
        static $mapper = [
            self::TYPE_HASH => '|^#\s*$|', // single line comment starting with '#'
            self::TYPE_SLASH_ASTERISK => '|^/\*\s*\*/$|', // comment starting with '/*' and ending with '*/' (but not a PHPDoc)
            self::TYPE_DOUBLE_SLASH => '|^//\s*$|', // single line comment starting with '//'
        ];

        $type = $this->getCommentType($content);

        return 1 === Preg::match($mapper[$type], $content);
    }
private function isEmptyComment($content)
    {
        static $mapper = [
            self::TYPE_HASH => '|^#\s*$|', // single line comment starting with '#'
            self::TYPE_SLASH_ASTERISK => '|^/\*\s*\*/$|', // comment starting with '/*' and ending with '*/' (but not a PHPDoc)
            self::TYPE_DOUBLE_SLASH => '|^//\s*$|', // single line comment starting with '//'
        ];

        $type = $this->getCommentType($content);

        return 1 === Preg::match($mapper[$type], $content);
    }
@param string $content

@return bool