[Pmwiki-users] Help with PHP regexp

[John Feezell]

Thanks, Christian, this is very helpful.

-JF

On Fri, 9 Jan 2004 02:06:41 +0100 (CET), Christian Ridderstr?m 
<chr at home.se> wrote:

> On Mon, 5 Jan 2004, John Feezell wrote:
>
>> I recently began studying PHP regular expressions so that I could use 
>> them with PmWiki and FTS.  I have material from the PHP manual but would 
>> like to know how others on the list have gained knowledge of these - 
>> websites, books, etc..
>
> Try this tool on them:
>
> 	http://www.weitz.de/regex-coach/
>
> It can show a 'tree'-view of the regexp which is nice when you are 
> drowning in parenthesis...
>
> However, remember that in a statement like this:
>
> 	re = "la bla\n";
>
> the last character in the string will not be 'n', since "\n" is 
> translated... the regexps you see in pmwiki.php therefore have lots of 
> double '\\' for every '\' ...
>
> To see what the strings really contain, open local.php and add this line
>
> 	$EnableDiag=1;
>
> then use the browser on a page with the action 'diag', i.e. like this:
>
> 	http://www.lyx.org/~chr/attachlist/pmwiki.php?action=diag
>
> that page will (among lots of other stuff) contain the actual regexps as 
> they are recieved by preg_match() and others. This is what you copy'n 
> paste into 'regex-coach'
>
> /Christian
>



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