- $AbortFunction
- A custom function name replacing the built-in Abort() function. 
- $EnableDiag
- 
 
The following actions are available only if you set $EnableDiag = 1;
- ?action=ruleset
-  displays a list of all markups in 4 columns:
- column 1 = markup-name (1. parameter of markup() )
- column 2 = when will rule apply (2. parameter of markup() )
- column 3 = PmWiki's internal sort key (derived from #2)
- column 4 = Debug backtrace information for potentially incompatible rules (filename, line number, pattern)
 
(see 
Custom Markup  Using the Markup() function for custom wiki syntax; migration to PHP 5.5 ).
To see more than what 
?action=ruleset gives you, apply the 
Cookbook:MarkupRulesetDebugging recipe: it can also show the pattern and the replacement strings.
- doesn't make use of PmWiki's authorization mechanisms.
- ?action=phpinfo
-  displays the output of phpinfo() and exits. No page will be processed
- doesn't make use of PmWiki's authorization mechanisms.
 
- ?action=diag
-  displays a dump of all global vars and exits. No page will be processed
- doesn't make use of PmWiki's authorization mechanisms.
 
 
- $EnableIMSCaching
- A variable which, when set equal to 1, recognizes the "If-Modified-Since" header coming from browsers and allows browsers to use locally cached pages.  Disabled by default to help the administrator customize its page without needing permanent reloading.
- $EnableStopWatch
- This activates an internal stopwatch that shows how long it takes to render a page. (If you have a wiki that composes a HTML page from multiple pages, such as a normal layout with a sidebar, you'll get separate timings for each subpage and for the total page.)
-  
- The timings can be displayed by adding <!--function:StopWatchHTML 1-->in the wiki template.
-  
- Valid values are:
        $EnableStopWatch = 0; # No timings (the default). No HTML will be generated.
        $EnableStopWatch = 1; # Wall-clock timings only.
        $EnableStopWatch = 2; # Wall-clock and CPU usage timings. Won't work on Windows.
-  
- See Stopwatch for more details.
See also:
 
Is it possible for someone with admin priviledges to always have access to debugging tools, without letting everyone else access them?
You can easily & automatically allow debugging for anyone with admin priviledges (meanwhile leaving it off for everyone else) by including this line in config.php - just be sure that 1) $EnableDiag is either null or set to 0, and 2) to include it near the end of config.php, AFTER declaring your passwords, and after any AuthUser or other priviledge settings: