我的php 分页输出数据 全部输出没有按我设定的输出 也就是本来该一页输出5条的 现在全部输出完了

Question

    <?php


                        $mysql = new MysqlHelper();
                        $mysql->SetDb(DBTO);
                        $pageSize = 5;//一页显示个数
                        // 查看总共的试题个数
                        $sql1 = "select count(Surid) from p_survey";
                        $result1 = $mysql->Excute($sql1);
                        $row1 = mysql_fetch_array($result1, MYSQL_NUM);
                        $count = $row1[0];//共有多少条数据
                        $pageCount = ceil($count / $pageSize);//总共显示多少页数
                        if (@$_GET["tab1pageIndex"]) {
                            $tab1pageIndex = $_GET["tab1pageIndex"];
                            // 设置tab1为当前默认的tab
                            echo "<script>changeCurrentTabAsDefault(1);</script>";
                        } else {
                            $tab1pageIndex = 1;//当前页数
                        }

                        $offset = $pageSize * ($tab1pageIndex - 1);//第多少页



if ($tab1pageIndex == 1) echo "首页&nbsp;&nbsp;上一页&nbsp;";
                        if ($tab1pageIndex == 1)
                                        echo "首页&nbsp;&nbsp;上一页&nbsp;";
                                    else
                                        echo "<a href='welcome.php?tab1pageIndex=1'>首页</a>
                                                <a href='welcome.php?tab1pageIndex=" . ($tab1pageIndex - 1) . "'>上一页</a>&nbsp;&nbsp;";
                                    ?>
                                    当前 <?php echo $tab1pageIndex; ?>/<?php echo $pageCount; ?>
                                    &nbsp;&nbsp;
                                    <?php
                                    if ($tab1pageIndex == $pageCount)
                                        echo "下一页&nbsp;&nbsp;尾页&nbsp;";
                                    else
                                        echo "<a href='welcome.php?tab1pageIndex=" . ($tab1pageIndex + 1) . "'>下一页</a>
                                                <a href='welcome.php?tab1pageIndex=$pageCount'>尾页</a>";
                                    ?>