Error Handler not working for php 8.2

function db_query($sql, $err_msg=null)
{
    global $db, $SysPrefs, $sql_queries, $Ajax,    $db_connections, $db_last_inserted_id;

    // set current db prefix
    $comp = isset($_SESSION["wa_current_user"]->cur_con) ? $_SESSION["wa_current_user"]->cur_con : 0;
    $cur_prefix = @$db_connections[$comp]['tbpref'];
    $sql = str_replace(TB_PREF, $cur_prefix, $sql);

    if ($SysPrefs->show_sql)
    {
        $Ajax->activate('footer_debug');
        $sql_queries .= "<pre>$sql</pre>\n<hr>";
    }

    db_profile(); // mysql profiling

    $retry = MAX_DEADLOCK_RETRY;
 try { //kvvaradha added try and catch 
    do {
        $result = mysqli_query($db, $sql);
        if (mysqli_errno($db) == 1213)    { // deadlock detected
            sleep(1); $retry--;
        } else {
            throw new mysqli_sql_exception("Deadlock detected: $sql", 1062); //kvvaradha added to through the error in an exception and handle it on catch 
            $retry = 0;
        }
    } while ($retry);

    db_profile($sql);

    if($SysPrefs->sql_trail) {
        $db_last_inserted_id = mysqli_insert_id($db);    // preserve in case trail insert is done
        if ($SysPrefs->select_trail || (strstr($sql, 'SELECT') === false)) {
            mysqli_query($db, "INSERT INTO ".$cur_prefix."sql_trail
                (`sql`, `result`, `msg`)
                VALUES(".db_escape($sql).",".($result ? 1 : 0).",
                ".db_escape($err_msg).")");
        }
    }
 } catch (mysqli_sql_exception $e) {. //kvvaradha added catch 
        $error_msg = $e->getMessage();
        $error_code = $e->getCode();
    if ($err_msg != null || $SysPrefs->go_debug) {
        $exit = $err_msg != null;
        if (function_exists('xdebug_call_file'))
            $err_msg = '<br>At file '.xdebug_call_file().':'.xdebug_call_line().':<br>'.$err_msg;
        check_db_error($err_msg, $sql, $exit);
    }
 throw $e; // rethrow the exception after handling
    }
    return $result;
}

function display_type ($type, $typename, $from, $to, $begin, $end, $compare, $convert,
    $dimension=0, $dimension2=0, $drilldown, $path_to_root)

function display_type ($type, $typename, $from, $to, $begin, $end, $compare, $convert,
    $dimension=0, $dimension2=0, $drilldown=0) {
        global $path_to_root;