[pmwiki-users] Conditional extensions

[Patrick R. Michaud]

On Wed, Apr 20, 2005 at 10:54:22PM +0200, Dominique Faure wrote:
> Sorry to ask you to update the recipe script again, but I had time to 
> seriously update it and give it an infix notation, with the resulting 
> SideBar code as example:

Wow, what a clever (and impressive) implementation!  

Perhaps it can be shortened a bit...?

$Conditions['expr'] = "ExprCondition(\$pagename, \$condparm)";

function ExprCondition($pagename, $condparm) {
  $condparm = str_replace('&&', '&&', $condparm);
  $delims = '/(\\s*(and|or|xor|&&|\\|\\||!|\\(|\\))\\s*)/i';
  $terms = preg_split($delims, $condparm, -1,
                      PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
  foreach($terms as $i => $t) 
    if(!preg_match($delims, $t)) 
      $terms[$i] = CondText($pagename, "if $t", 'TRUE') ? '1' : '0';
  return @eval('return (' . implode(' ', $terms) . ');');
}

Pm