diff --git a/admin/link.php b/admin/link.php
index 62c2346..ea01173 100644
--- a/admin/link.php
+++ b/admin/link.php
@@ -1,7 +1,7 @@
-<?php 
-$title='网站链接管理';
+<?php
+$title = '网站链接管理';
 include './head.php';
-$grouplists =mysqli_query($con,"SELECT * FROM `lylme_groups`");
+$grouplists = $DB->query("SELECT * FROM `lylme_groups`");
 ?>
     <main class="lyear-layout-content">
       
@@ -12,12 +12,9 @@ $grouplists =mysqli_query($con,"SELECT * FROM `lylme_groups`");
             <div class="card">
               <div class="card-body">
 <?php
-
-$set=isset($_GET['set'])?$_GET['set']:null;
-
-if($set=='add')
-{
-echo '<h4>新增链接</h4>
+$set = isset($_GET['set']) ? $_GET['set'] : null;
+if ($set == 'add') {
+    echo '<h4>新增链接</h4>
 <div class="panel-body">
 <form action="./link.php?set=add_submit" method="POST">
 <div class="form-group">
@@ -37,37 +34,38 @@ echo '<h4>新增链接</h4>
 <div class="form-group">
 <label>*分组:</label><br>
 <select class="form-control" name="group_id">';
-
-while($grouplist = mysqli_fetch_assoc($grouplists)) {
-    if($grouplist["group_id"]==$row['group_id']){$select='selected="selected"';}else {$select='';}
- echo '<option  value="'.$grouplist["group_id"].'">'.$grouplist["group_id"].' - '.$grouplist["group_name"].'</option>';
-}
-echo '</select></div>
+    while ($grouplist = $DB->fetch($grouplists)) {
+        if ($grouplist["group_id"] == $row['group_id']) {
+            $select = 'selected="selected"';
+        } else {
+            $select = '';
+        }
+        echo '<option  value="' . $grouplist["group_id"] . '">' . $grouplist["group_id"] . ' - ' . $grouplist["group_name"] . '</option>';
+    }
+    echo '</select></div>
 <div class="form-group">
 <input type="submit" class="btn btn-primary btn-block" value="添加"></form>
 </div>
 <br/><a href="./link.php"><<返回</a>
 </div></div>';
-}
-elseif($set=='edit')
-{
-$id=$_GET['id'];
-$row2 = mysqli_query($con,"select * from lylme_links where id='$id' limit 1");
-$row=mysqli_fetch_assoc($row2);
-echo '<h4>修改链接信息</h4>
+} elseif ($set == 'edit') {
+    $id = $_GET['id'];
+    $row2 = $DB->query("select * from lylme_links where id='$id' limit 1");
+    $row = $DB->fetch($row2);
+    echo '<h4>修改链接信息</h4>
 <div class="panel-body">
-<form action="./link.php?set=edit_submit&id='.$id.'" method="POST">
+<form action="./link.php?set=edit_submit&id=' . $id . '" method="POST">
 <div class="form-group">
 <label>*名称:</label><br>
-<input type="text" class="form-control" name="name" value="'.$row['name'].'" required>
+<input type="text" class="form-control" name="name" value="' . $row['name'] . '" required>
 </div>
 <div class="form-group">
 <label>*链接URL地址:</label><br>
-<input type="text" class="form-control" name="url" value="'.$row['url'].'" required>
+<input type="text" class="form-control" name="url" value="' . $row['url'] . '" required>
 </div>
 <div class="form-group">
 <label>链接图标:</label><br>
-<textarea type="text" class="form-control" name="icon" >'.$row['icon'].'</textarea>
+<textarea type="text" class="form-control" name="icon" >' . $row['icon'] . '</textarea>
 <small class="help-block">方式1：填写图标的<code>URL</code>地址，如<code>/img/logo.png</code>或<code>http://www.xxx.com/img/logo.png</code><br>
 方式2：粘贴图标的<code>SVG</code>代码，<a href="/admin/help.php?doc=icon" target="_blank">查看教程</a><br>方式3：留空使用默认图标</small>
 </div>
@@ -75,83 +73,70 @@ echo '<h4>修改链接信息</h4>
 <div class="form-group">
 <label>*分组:</label><br>
 <select class="form-control" name="group_id">';
-while($grouplist = mysqli_fetch_assoc($grouplists)) {
-    if($grouplist["group_id"]==$row['group_id']){$select='selected="selected"';}else {$select='';}
- echo '<option  value="'.$grouplist["group_id"].'" '.$select.'>'.$grouplist["group_id"].' - '.$grouplist["group_name"].'</option>';
-}
-echo '</select>
+    while ($grouplist = $DB->fetch($grouplists)) {
+        if ($grouplist["group_id"] == $row['group_id']) {
+            $select = 'selected="selected"';
+        } else {
+            $select = '';
+        }
+        echo '<option  value="' . $grouplist["group_id"] . '" ' . $select . '>' . $grouplist["group_id"] . ' - ' . $grouplist["group_name"] . '</option>';
+    }
+    echo '</select>
 </div>
 <div class="form-group">
 <input type="submit" class="btn btn-primary btn-block" value="修改"></form>
 </div>
 <br/><a href="./link.php"><<返回</a>
 </div></div>';
-}
-elseif($set=='add_submit')
-{
-$name=$_POST['name'];
-$url=$_POST['url'];
-$icon=$_POST['icon'];
-$group_id=$_POST['group_id'];
-$link_order = $linksrows+1;
-if($name==NULL or $url==NULL){
-     echo '<script>alert("保存错误,请确保带星号的都不为空！");history.go(-1);</script>';
+} elseif ($set == 'add_submit') {
+    $name = $_POST['name'];
+    $url = $_POST['url'];
+    $icon = $_POST['icon'];
+    $group_id = $_POST['group_id'];
+    $link_order = $linksrows + 1;
+    if ($name == NULL or $url == NULL) {
+        echo '<script>alert("保存错误,请确保带星号的都不为空！");history.go(-1);</script>';
+    } else {
+        $sql = "INSERT INTO `lylme_links` (`id`, `name`, `group_id`, `url`, `icon`, `PS`,`link_order`) VALUES (NULL, '" . $name . "', '" . $group_id . "', '" . $url . "', '" . $icon . "', '" . $name . "', '" . $link_order . "');";
+        if ($DB->query($sql)) {
+            echo '<script>alert("添加链接 ' . $name . ' 成功！");window.location.href="/admin/link.php";</script>';
+        } else echo '<script>alert("添加链接失败！");history.go(-1);</script>';
+    }
+} elseif ($set == 'edit_submit') {
+    $id = $_GET['id'];
+    $rows2 = $DB->query("select * from lylme_links where id='$id' limit 1");
+    $rows = $DB->fetch($rows2);
+    if (!$rows) echo '<script>alert("当前记录不存在！");history.go(-1);</script>';
+    $name = $_POST['name'];
+    $url = $_POST['url'];
+    $icon = $_POST['icon'];
+    $group_id = $_POST['group_id'];
+    if ($name == NULL or $url == NULL) {
+        echo '<script>alert("保存错误,请确保带星号的都不为空！");history.go(-1);</script>';
+    } else {
+        $sql = "UPDATE `lylme_links` SET `name` = '" . $name . "', `url` = '" . $url . "', `icon` = '" . $icon . "', `group_id` = '" . $group_id . "' WHERE `lylme_links`.`id` = '" . $id . "';";
+        if ($DB->query($sql)) echo '<script>alert("修改链接 ' . $name . ' 成功！");window.location.href="/admin/link.php";</script>';
+        else echo '<script>alert("修改链接失败！");history.go(-1);</script>';
+    }
+} elseif ($set == 'delete') {
+    $id = $_GET['id'];
+    $sql = "DELETE FROM lylme_links WHERE id='$id'";
+    if ($DB->query($sql)) echo '<script>alert("删除成功！");window.location.href="/admin/link.php";</script>';
+    else echo '<script>alert("删除失败！");history.go(-1);</script>';
 } else {
-$sql="INSERT INTO `lylme_links` (`id`, `name`, `group_id`, `url`, `icon`, `PS`,`link_order`) VALUES (NULL, '".$name."', '".$group_id."', '".$url."', '".$icon."', '".$name."', '".$link_order."');";
-
-if(mysqli_query($con,$sql)){
- echo '<script>alert("添加链接 '.$name.' 成功！");window.location.href="/admin/link.php";</script>';
-}else
- echo '<script>alert("添加链接失败！");history.go(-1);</script>';
-}
-}
-elseif($set=='edit_submit')
-{
-$id=$_GET['id'];
-$rows2 = mysqli_query($con,"select * from lylme_links where id='$id' limit 1");
-$rows=mysqli_fetch_assoc($rows2);
-if(!$rows)
- echo '<script>alert("当前记录不存在！");history.go(-1);</script>';
-$name=$_POST['name'];
-$url=$_POST['url'];
-$icon=$_POST['icon'];
-$group_id=$_POST['group_id'];
-if($name==NULL or $url==NULL){
-     echo '<script>alert("保存错误,请确保带星号的都不为空！");history.go(-1);</script>';
-} else {
-    
-$sql = "UPDATE `lylme_links` SET `name` = '".$name."', `url` = '".$url."', `icon` = '".$icon."', `group_id` = '".$group_id."' WHERE `lylme_links`.`id` = '".$id."';";
-if(mysqli_query($con,$sql))
-echo '<script>alert("修改链接 '.$name.' 成功！");window.location.href="/admin/link.php";</script>';
-else
- echo '<script>alert("修改链接失败！");history.go(-1);</script>';
-}
-}
-elseif($set=='delete')
-{
-$id=$_GET['id'];
-$sql="DELETE FROM lylme_links WHERE id='$id'";
-if(mysqli_query($con,$sql))
- echo '<script>alert("删除成功！");window.location.href="/admin/link.php";</script>';
-else
- echo '<script>alert("删除失败！");history.go(-1);</script>';
-}
-else
-{
-echo '<div class="alert alert-info">系统共有 <b>'.$linksrows.'</b> 个链接<br/><a href="./link.php?set=add" class="btn btn-primary">新增链接</a></div>
+    echo '<div class="alert alert-info">系统共有 <b>' . $linksrows . '</b> 个链接<br/><a href="./link.php?set=add" class="btn btn-primary">新增链接</a></div>
       <div class="table-responsive">
         <table class="table table-striped">
           <thead><tr><th>序号</th><th>名称</th><th>链接</th><th>分组</th><th>操作</th></tr></thead>
           <tbody>';
-$i = 0;
-$rs=mysqli_query($con,"SELECT * FROM `lylme_links` ORDER BY `lylme_links`.`id` ASC");
-while($res = mysqli_fetch_array($rs))
-{
-$i = $i+1;
-echo '<tr><td><b>'.$i.'</b></td><td>'.$res['name'].'</td><td>'.$res['url'].'</td><td>';
-echo mysqli_fetch_assoc(mysqli_query($con,"SELECT * FROM `lylme_groups` WHERE `group_id` = ".$res['group_id']))["group_name"];
-echo '</td><td><a href="./link.php?set=edit&id='.$res['id'].'" class="btn btn-info btn-xs">编辑</a>&nbsp;<a href="./link.php?set=delete&id='.$res['id'].'" class="btn btn-xs btn-danger" onclick="return confirm(\'删除 '.$res['name'].' ？\');">删除</a></td></tr>';
-}
+    $i = 0;
+    $rs = $DB->query("SELECT * FROM `lylme_links` ORDER BY `lylme_links`.`id` ASC");
+    while ($res = $DB->fetch($rs)) {
+        $i = $i + 1;
+        echo '<tr><td><b>' . $i . '</b></td><td>' . $res['name'] . '</td><td>' . $res['url'] . '</td><td>';
+        echo $DB->fetch($DB->query("SELECT * FROM `lylme_groups` WHERE `group_id` = " . $res['group_id'])) ["group_name"];
+        echo '</td><td><a href="./link.php?set=edit&id=' . $res['id'] . '" class="btn btn-info btn-xs">编辑</a>&nbsp;<a href="./link.php?set=delete&id=' . $res['id'] . '" class="btn btn-xs btn-danger" onclick="return confirm(\'删除 ' . $res['name'] . ' ？\');">删除</a></td></tr>';
+    }
 ?>
           </tbody>
         </table>
@@ -165,9 +150,7 @@ echo '</td><td><a href="./link.php?set=edit&id='.$res['id'].'" class="btn btn-in
       </div>
       
     </main>
-<?php 
-
+<?php
 }
-
 include './footer.php';
-?>
\ No newline at end of file
+?>