Language-specific Search Operators

As my site's language is not english, I didn't like the fact that I needed to enter "and" or "or" when doing product searches, so I made a minor change to function zen_parse_search_string.

It will now make use of another constant, which should be translated for each language.
This way, I can enter for instance "gift og certificate" and "gift eller certificate" ("og" means "and", "eller" means "or").

I also added "&" and "|" as operators ("and" and "or").

First, add the following lines to includes/languages/<language>.php

define('OPERATOR_AND', 'and');
define('OPERATOR_OR', 'or');

(and translate 'and' and 'or' to your language)

Then simply replace the following code from includes/functions/functions_general.php:
(around line 364)

// add default logical operators if needed
  $temp = array();
  for($i=0; $i<(count($objects)-1); $i++) {
   $temp[] = $objects[$i];
   if ( ($objects[$i] != 'and') &&
      ($objects[$i] != 'or') &&
      ($objects[$i] != '(') &&
      ($objects[$i+1] != 'and') &&
      ($objects[$i+1] != 'or') &&
      ($objects[$i+1] != ')') ) {
    $temp[] = ADVANCED_SEARCH_DEFAULT_OPERATOR;
   }
  }
  $temp[] = $objects[$i];
  $objects = $temp;

  $keyword_count = 0;
  $operator_count = 0;
  $balance = 0;
  for($i=0; $i<count($objects); $i++) {
   if ($objects[$i] == '(') $balance --;
   if ($objects[$i] == ')') $balance ++;
   if ( ($objects[$i] == 'and') || ($objects[$i] == 'or') ) {
    $operator_count ++;
   } elseif ( ($objects[$i]) && ($objects[$i] != '(') && ($objects[$i] != ')') ) {
    $keyword_count ++;
   }
  }

  if ( ($operator_count < $keyword_count) && ($balance == 0) ) {
   return true;
  } else {
   return false;
  }
 }


////

with this code:

// add default logical operators if needed
  $temp = array();
  for($i=0; $i<(count($objects)-1); $i++) {
   $temp[] = $objects[$i];
   if ( ($objects[$i] != OPERATOR_AND) &&
      ($objects[$i] != '&') &&
      ($objects[$i] != OPERATOR_OR) &&
  ($objects[$i] != '|') &&
      ($objects[$i] != '(') &&
      ($objects[$i+1] != OPERATOR_AND) &&
      ($objects[$i+1] != OPERATOR_OR) &&
      ($objects[$i+1] != '&') &&
      ($objects[$i+1] != '|') &&
      ($objects[$i+1] != ')') ) {
    $temp[] = ADVANCED_SEARCH_DEFAULT_OPERATOR;
   }
  }
  $temp[] = $objects[$i];
  $objects = $temp;

  $keyword_count = 0;
  $operator_count = 0;
  $balance = 0;
  for($i=0; $i<count($objects); $i++) {
   if ($objects[$i] == '(') $balance --;
   if ($objects[$i] == ')') $balance ++;
   
   if ( ($objects[$i] == OPERATOR_AND) || ($objects[$i] == '&') ) {$objects[$i] = 'and'; $operator_count ++;}
   elseif ( ($objects[$i] == OPERATOR_OR) || ($objects[$i] == '|') ) {$objects[$i] = 'or'; $operator_count ++;}
   elseif ( ($objects[$i]) && ($objects[$i] != '(') && ($objects[$i] != ')') ) {
    $keyword_count ++;
   }
  }

  if ( ($operator_count < $keyword_count) && ($balance == 0) ) {
   return true;
  } else {
   return false;
  }
 }


////