public static function warning($messages, $linebreak = true, $length = 0)
    {
        $separator = $linebreak ? "\n" : '';
        self::write($messages, 'warning', $length, $separator);
    }
public static function warning($messages, $linebreak = true, $length = 0)
    {
        $separator = $linebreak ? "\n" : '';
        self::write($messages, 'warning', $length, $separator);
    }
public static function warning ( $ messages , $ linebreak = true , $ length = 0 ) { $ separator = $ linebreak ? "\n" : '' ; self :: write ( $ messages , 'warning' , $ length , $ separator ) ; }
Write warning messages.

@param string|array $messages
@param boolean $linebreak Default false.
@param integer $length Default 0 which means not fixed length.
Write warning messages .