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refine_searchstring()

Description

Refines the search string to eliminate duplicates and ensure proper formatting.

This function addresses several issues related to searching, including:
- Eliminating duplicate terms from the search query.
- Preserving string search functionality when quotes are used.
- Formatting date-related keywords correctly.
- Adjusting keywords for advanced search fields and ensuring they carry over properly.
- Fixing bugs related to search separators and ensuring valid search syntax.

Parameters

ColumnTypeDefaultDescription
$search string The original search string to be refined.

Return

string The refined search string, with duplicates removed and properly formatted.

Location

include/search_functions.php lines 561 to 634

Definition

 
function refine_searchstring($search)
    {
    global $use_refine_searchstring;

    if (!$use_refine_searchstring){return $search;}

    if (substr($search,0,1)=="\"" && substr($search,-1,1)=="\"") {return $search;} // preserve string search functionality.

    global $noadd;
    $search=str_replace(",-",", -",$search);
    $search=str_replace ("\xe2\x80\x8b","",$search);// remove any zero width spaces.

    $keywords=split_keywords($search, false, false, false, false, true);

    $orfields=get_OR_fields(); // leave checkbox type fields alone
    $dynamic_keyword_fields=ps_array("SELECT name value FROM resource_type_field where type=9", array(), "schema");

    $fixedkeywords=array();
    foreach ($keywords as $keyword)
        {
        if (strpos($keyword,"startdate")!==false || strpos($keyword,"enddate")!==false)
            {
            $keyword=str_replace(" ","-",$keyword);
            }

        if(strpos($keyword,"!collection") === 0)
            {
            $collection=intval(substr($search,11));
            $keyword = "!collection" . $collection;
            }

        if (strpos($keyword,":")>0)
            {
            $keywordar=explode(":",$keyword,2);
            $keyname=$keywordar[0];
            if (substr($keyname,0,1)!="!")
                {
                if(substr($keywordar[1],0,5)=="range"){$keywordar[1]=str_replace(" ","-",$keywordar[1]);}
                if (!in_array($keyname,$orfields))
                    {
                    $keyvalues=explode(" ",str_replace($keywordar[0].":","",$keywordar[1]));
                    }
                else
                    {
                    $keyvalues=array($keywordar[1]);
                    }
                foreach ($keyvalues as $keyvalue)
                    {
                    if (!in_array($keyvalue,$noadd))
                        {
                        $fixedkeywords[]=$keyname.":".$keyvalue;
                        }
                    }
                }
            elseif (!in_array($keyword,$noadd))
                {
                $keywords=explode(" ",$keyword);
                $fixedkeywords[]=$keywords[0];
                } // for searches such as !list
            }
        else
            {
            if (!in_array($keyword,$noadd))
                {
                $fixedkeywords[]=$keyword;
                }
            }
        }
    $keywords=$fixedkeywords;
    $keywords=array_unique($keywords);
    $search=implode(", ",$keywords);
    $search=str_replace(",-"," -",$search); // support the omission search
    return $search;
    }

This article was last updated 13th December 2024 20:35 Europe/London time based on the source file dated 12th December 2024 10:30 Europe/London time.