Question

代码：

<?php
    $id = $_GET['id'];
    $sql = "select * from admin_menu where id = '$id'";
    $result = mysqli_query($link,$sql);
    while ($row = mysqli_fetch_array($result)) 
    {
        $menu_name = $row['menu_name'];
        $menu_link = $row['menu_link'];
        $priority = $row['priority'];
        $admin_id = explode(",", $row['admin_id']);
    }
    if(isset($_POST['update']))
    {
        $admin_id = $_POST['admin_id'];
        $chk=""; 
        foreach($admin_id as $chk1)  
        {  
            $chk .= $chk1.",";  
        } 
        $menu_name = $_POST['menu_name'];
        $menu_link = $_POST['menu_link'];
        $priority = $_POST['priority'];
        $sql = "update admin_menu set menu_name = '$menu_name', menu_link = '$menu_link', priority = '$priority', admin_id = '$chk' where id = '$id'";
        $result = mysqli_query($link,$sql);
        if($result == true)
        {
            $msg .= "<h3 style='color:green;'>update</h3>";
        }
        else
        {
            $msg .= "<h3 style='color:red;'>Error!</h3>";   
        }
    }   
?>
<form name="myform" method="post" >
        <div class="row">
            <label for="Producer_firstname">Admin Name</label> 
            <?php
                foreach ($admin_id as $admin_id) 
                {
                    $chk = "";
                    if (in_array($chk, $admin_id)) 
                    {
                        $chk = 'checked="checked" ';
                    }
                    echo '<input type="checkbox" name="admin_id[]" value="'.$admin_id.'" '.$chk.'/><br/>';
                }
            ?>    
        </div>

        <div class="row">
            <label for="Producer_firstname">Menu Name </label>      
            <input size="60" maxlength="255" name="menu_name" id="menu_name" value="<?php echo $menu_name; ?>" type="text" />           
        </div>

        <div class="row">
            <label for="Producer_lastname" >Menu Link </label>      
            <input size="60" maxlength="255" name="menu_link" id="menu_link"  type="text" value="<?php echo $menu_link; ?>" />          
        </div>

        <div class="row">
            <label for="Producer_lastname" >Priority</label>        
            <select name="priority" id="priority">
                <option value="<?php echo $priority; ?>"><?php echo $priority; ?></option>
                <option value="">choose any one</option>
                <option value="1">1</option>
                <option value="0">0</option>
            </select>   
        </div>

        <div class="row buttons">
            <button type="submit" name='update' id='update'>update Menu</button>
        </div>
    </form>

在这段代码中，我从表admin2中获取多个复选框值，我希望在更新表单值复选框时检查复选框的值是否存在于数据库中。我该如何解决？

谢谢

Answer 1

您的代码几乎没有问题，
1.更新应在选择查询之前完成 2.管理员名单未单独管理
3.未正确管理优先级单选按钮

其他建议，
1.使用准备查询语句
2.使用implode附加多个值而不是foreach
3.在复选框之前打印管理员名称

<?php
    $id = $_GET['id'];
    if(isset($_POST['update']))
    {
        $chk = implode(',', $_POST['admin_id']);
        $menu_name = $_POST['menu_name'];
        $menu_link = $_POST['menu_link'];
        $priority = $_POST['priority'];
        $sql = "update admin_menu set menu_name = '$menu_name', menu_link = '$menu_link', priority = '$priority', admin_id = '$chk' where id = '$id'";
        $result = mysqli_query($link,$sql);
        $msg = "";
        if($result == true)
        {
            $msg .= "<h3 style='color:green;'>update</h3>";
        }
        else
        {
            $msg .= "<h3 style='color:red;'>Error!</h3>";   
        }
        echo $msg;
    }

    $sql = "select * from admin_menu where id = '$id'";
    $result = mysqli_query($link,$sql);
    $row = mysqli_fetch_array($result);
    $menu_name = $row['menu_name'];
    $menu_link = $row['menu_link'];
    $priority = $row['priority'];
    $admin_id = explode(",", $row['admin_id']);
    $admins = array('admin1', 'admin2', 'admin3', 'admin4', 'admin5', 'admin6', 'admin7', 'admin8');
?>

<form name="myform" method="post" >
    <div class="row">
        <label for="Producer_firstname">Admin Name</label>
        <?php
            foreach ($admins as $admin) 
            {
                $chk = "";
                if (in_array($admin, $admin_id)) 
                {
                    $chk = 'checked="checked" ';
                }
                echo $admin.' <input type="checkbox" name="admin_id[]" value="'.$admin.'" '.$chk.'/><br/>';
            }
        ?>    
    </div>

    <div class="row">
        <label for="Producer_firstname">Menu Name </label>      
        <input size="60" maxlength="255" name="menu_name" id="menu_name" value="<?php echo $menu_name; ?>" type="text" />           
    </div>

    <div class="row">
        <label for="Producer_lastname" >Menu Link </label>      
        <input size="60" maxlength="255" name="menu_link" id="menu_link"  type="text" value="<?php echo $menu_link; ?>" />          
    </div>

    <div class="row">
        <label for="Producer_lastname" >Priority</label>        
        <select name="priority" id="priority">
            <option value="1" <?php if($priority == 1) echo "selected='selected'"; ?>>1</option>
            <option value="0" <?php if($priority == 0) echo "selected='selected'"; ?>>0</option>
        </select>   
    </div>

    <div class="row buttons">
        <button type="submit" name='update' id='update'>update Menu</button>
    </div>
</form>

多个复选框检查数据库中是否有值？

1 个答案: