Is it possible? (Server Side Processing)

Hi, it is possible to do a if else on search/filtering in the server side (ssp.class).

For example:
If I want to do a exact search I need to put ("test") to search else I will search everything with global search.

Hope you can give me some advise on how should I do it.

static function filter ( $request, $columns, &$bindings )
{
    $globalSearch = array();
    $columnSearch = array();
    $dtColumns = self::pluck( $columns, 'dt' );

    if ( isset($request['search']) && $request['search']['value'] != '' ) {
        $str = $request['search']['value'];

        for ( $i=0, $ien=count($request['columns']) ; $i<$ien ; $i++ ) {
            $requestColumn = $request['columns'][$i];
            $columnIdx = array_search( $requestColumn['data'], $dtColumns );
            $column = $columns[ $columnIdx ];

            if ( $requestColumn['searchable'] == 'true' ) {
                $binding = self::bind( $bindings, '%'.$str.'%', PDO::PARAM_STR );
                $globalSearch[] = "`".$column['db']."` LIKE ".$binding;
            }
        }
    }

    // Individual column filtering
    for ( $i=0, $ien=count($request['columns']) ; $i<$ien ; $i++ ) {
        $requestColumn = $request['columns'][$i];
        $columnIdx = array_search( $requestColumn['data'], $dtColumns );
        $column = $columns[ $columnIdx ];

        $str = $requestColumn['search']['value'];

        if ( $requestColumn['searchable'] == 'true' &&
         $str != '' ) {
            $binding = self::bind( $bindings,'%'.$str.'%', PDO::PARAM_STR );
            $columnSearch[] = "`".$column['db']."` LIKE ".$binding;
        }
    }

    // Combine the filters into a single string
    $where = '';

    if ( count( $globalSearch ) ) {
        $where = '('.implode(' OR ', $globalSearch).')';
    }

    if ( count( $columnSearch ) ) {
        $where = $where === '' ?
            implode(' AND ', $columnSearch) :
            $where .' AND '. implode(' AND ', $columnSearch);
    }

    if ( $where !== '' ) {
        $where = 'WHERE '.$where;
    }

    return $where;
}