app/code/community/Adyen/Payment/Helper/Pci.php
protected function _obscureSensitiveElements($string)
    {
        return preg_replace_callback(
            self::$_sensitiveElementPatterns, function ($matches) {
            return $matches[1] . $this->_obscureString($matches[2]) . $matches[3];
            }, $string
        );
    }
protected function _obscureSensitiveElements($string)
    {
        return preg_replace_callback(
            self::$_sensitiveElementPatterns, function ($matches) {
            return $matches[1] . $this->_obscureString($matches[2]) . $matches[3];
            }, $string
        );
    }
protected function _obscureSensitiveElements ( $ string ) { return preg_replace_callback ( self :: $ _sensitiveElementPatterns , function ( $ matches ) { return $ matches [ 1 ] . $ this -> _obscureString ( $ matches [ 2 ] ) . $ matches [ 3 ] ; } , $ string ) ; }
Replace any matched sensitive strings with an obscured version
@param string $string
@return string
Replace any matched sensitive strings with an obscured version