Re: Any recommendations on using PHP to parse marked-up text?

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From	Arno Welzel <usenet@arnowelzel.de>
Newsgroups	comp.lang.php
Subject	Re: Any recommendations on using PHP to parse marked-up text?
Date	Mon, 22 Feb 2016 16:38:08 +0100
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James Harris schrieb am 2016-02-21 um 18:55:

> On 21/02/2016 17:35, Arno Welzel wrote:
>> James Harris schrieb am 2016-02-20 um 19:51:
>>
>>> On 18/02/2016 15:43, Jerry Stuckle wrote:
>> [...]
>>>> Way to vague a question for an intelligent answer, and any answer at
>>>> this juncture is just a guess.  It all depends on how the text is going
>>>> to be marked up.
>>>
>>> The markup can be chosen. As long as it is easy to parse and easy for a
>>> human to work with it would be suitable. Most such markup would be
>>> converted to HTML elements: <hN>, <p>, <a>, etc and corresponding
>>> closing tags. There could also be self-contained tags which get
>>> converted to <br>, <hr> etc.
>>>
>>> To illustrate, here is one possible scheme for opening and closing tags:
>>>
>>> @(tagname, parameter, parameter)text@(/tagname)
>>
>> And why using this special markup and not HTML or XML? This would not be
>> much different.
> 
> For a few reasons. I think I have mentioned most of them in other 
> subthreads but don't worry about them.

Let's see one of them:

"I see what you mean but in this case the markup is partly for security.
I need to ensure that the person who writes the markup does not have
access to general HTML facilities. But at the same time I need to
provide enough to allow for basic markup of text and probably a few
other things."

Avoiding "general HTML facilities" is easy - just create whitelist of
allowed tags and attributes and filter everything else out. This is how
most CMS handle HTML input to avoid embedded JavaScript or breaking the
site layout using local CSS etc.

And then:

"For example, I may have a /conditional/ link tag that, for local
targets, will check that the target exists. If the target does not exist
then the link will render as non-clickable text. If the target does
exist then the text will be clickable."

Well - checking the existence of a linked target hast is nothing to do
with markup at all. You may use HTML as a basis and either define that
links will only be kept if the target exists. No user will understand,
that he or she has to use a special "conditional link" element for local
targets which may not exist.

Maybe you should just try existing systems like DokuWiki to get a
feeling for how this kind of content management works.

-- 
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de
http://fahrradzukunft.de

Thread

Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-18 12:47 +0000
  Re: Any recommendations on using PHP to parse marked-up text? Arno Welzel <usenet@arnowelzel.de> - 2016-02-18 15:52 +0100
    Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-20 18:28 +0000
  Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-18 14:56 +0000
    Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-18 22:14 +0100
      Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-18 21:45 +0000
        Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-18 23:09 +0100
          Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-19 01:15 +0000
            Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-19 02:45 +0100
              Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-19 12:03 +0000
                Re: Any recommendations on using PHP to parse marked-up text? Tim Streater <timstreater@greenbee.net> - 2016-02-19 12:17 +0000
                Re: Any recommendations on using PHP to parse marked-up text? "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-02-19 14:18 +0100
                Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-19 14:02 +0000
                Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-20 20:31 +0100
                Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-21 01:39 +0000
                Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-21 11:33 +0100
                Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-21 12:53 +0000
    Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-20 18:29 +0000
      Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-20 20:32 +0100
  Re: Any recommendations on using PHP to parse marked-up text? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-18 10:43 -0500
    Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-20 18:51 +0000
      Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-20 20:08 +0000
        Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-20 21:22 +0100
          Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-20 23:40 +0000
            Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-21 11:39 +0100
              Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-21 13:09 +0000
        Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-20 20:24 +0000
          Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-20 22:35 +0000
            Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 08:37 +0000
              Re: Any recommendations on using PHP to parse marked-up text? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-02-21 10:55 +0000
                Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 13:25 +0000
          Re: Any recommendations on using PHP to parse marked-up text? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-20 17:50 -0500
            Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 08:49 +0000
              Re: Any recommendations on using PHP to parse marked-up text? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-21 10:05 -0500
      Re: Any recommendations on using PHP to parse marked-up text? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-20 17:45 -0500
        Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 09:01 +0000
          Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-21 11:46 +0100
            Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 12:36 +0000
              Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-21 14:39 +0100
                Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 13:40 +0000
                Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-21 14:46 +0100
                Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 14:57 +0000
          Re: Any recommendations on using PHP to parse marked-up text? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-21 10:10 -0500
            Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 17:50 +0000
              Re: Any recommendations on using PHP to parse marked-up text? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-21 14:08 -0500
      Re: Any recommendations on using PHP to parse marked-up text? Arno Welzel <usenet@arnowelzel.de> - 2016-02-21 18:35 +0100
        Re: Any recommendations on using PHP to parse marked-up text? James Harris <james.harris.1@gmail.com> - 2016-02-21 17:55 +0000
          Re: Any recommendations on using PHP to parse marked-up text? Arno Welzel <usenet@arnowelzel.de> - 2016-02-22 16:38 +0100
  Re: Any recommendations on using PHP to parse marked-up text? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-18 22:06 +0100
  Re: Any recommendations on using PHP to parse marked-up text? Ian Collins <ian-news@hotmail.com> - 2016-02-27 15:58 +1300

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