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resolve_keyword()

Description

Resolve keyword

Parameters

ColumnTypeDefaultDescription
$keyword string The keyword to resolve
$create bool false If keyword not found, should we create it instead?
$normalize bool true Should we normalize the keyword before resolving?
$stem bool true Should we use the keywords' stem when resolving?

Return

int|bool Returns the keyword reference for $keyword, or false if no such keyword exists.

Location

include/search_functions.php lines 2432 to 2479

Definition

 
function resolve_keyword($keyword,$create=false,$normalize=true,$stem=true)
    {
    debug_function_call("resolve_keyword", func_get_args());

    // Create a cache to ensure we find new nodes subsequently if in a transaction
    global $resolve_keyword_cache;
    global $quoted_string, $stemming;
    $kwhash = md5($keyword) . md5("!" . $keyword . ($normalize ? "NORM" : "") . ($stem ? "STEM" : ""));
    if(isset($resolve_keyword_cache[$kwhash]))
        {
        return $resolve_keyword_cache[$kwhash];
        }
    $keyword=mb_strcut($keyword,0,100); # Trim keywords to 100 chars for indexing, as this is the length of the keywords column.

    if(!$quoted_string && $normalize)
        {
        $keyword=normalize_keyword($keyword);
        debug("resolving normalized keyword " . $keyword  . ".");
        }

    # Stemming support. If enabled and a stemmer is available for the current language, index the stem of the keyword not the keyword itself.
    # This means plural/singular (and other) forms of a word are treated as equivalents.

    if ($stem && $stemming && function_exists("GetStem"))
        {
        $keyword=GetStem($keyword);
        }

    $return=ps_value("SELECT ref value FROM keyword WHERE keyword = ?",array("s",trim($keyword)),0,"keyword");
    if ($return===0)
        {
        if($create)
            {
            # Create a new keyword.
            debug("resolve_keyword: Creating new keyword for " . $keyword);
            ps_query("insert into keyword (keyword,soundex,hit_count) values (?,left(?,10),0)",array("s",$keyword,"s",soundex($keyword)));
            $return=sql_insert_id();
            clear_query_cache("keyword");
            }
        else
            {
            return false;
            }
        }

    $resolve_keyword_cache[$kwhash] = $return;
    return $return;
    }

This article was last updated 4th December 2024 09:05 Europe/London time based on the source file dated 27th November 2024 09:40 Europe/London time.