PHP+MySQL+jQueryUI完美便签条

摘要：过滤标签，并转义特殊字符内容长度为字符之间姓名长度为字符之间堆叠顺序值出错了演示下载地址

演示下载地址：http://www.erdangjiade.com/js...
效果图：

完整代码如下：

首先我们引入jQuery库、拖动插件jqueryui及弹出层插件fancybox：
      
     
    
    然后我们在notes表里面读取便签条：
    $query = mysql_query("select * from notes order by id desc limit 0, 50"); 
    while ($row = mysql_fetch_array($query)) { 
        list($left, $top, $zindex) = explode("|", $row["xyz"]); 
        $time = strtotime($row["addtime"]); 
        $notes.= " 
        
 
            " . $row["id"] . "." . htmlspecialchars($row["content"]) . " 
            
——" . htmlspecialchars($row["name"]) . "
(" . tranTime($time) . ")
 
        
"; 
    }
    添加便签条：
    $("#addbtn").live("click", function(e) { 
            var txt = $("#note_txt").val(); 
            var user = $("#user").val(); 
            var color = $("#mycolor").val(); 
            if (txt == "") { 
                $("#msg").html("内容不能为空"); 
                $("#note_txt").focus(); 
                return false; 
            } 
            if (user == "") { 
                $("#msg").html("请输入您的姓名！"); 
                $("#user").focus(); 
                return false; 
            } 
            var left = 0; 
                    var top = 0; 
            var data = { 
                "zIndex": ++zIndex, 
                "content": txt, 
                "user": user, 
                "color": color, 
                "left":left, 
                "top":top 
            }; 
            $.post("posts.php", data, function(msg) { 
                zIndex = zIndex++; 
                //alert(zIndex); 
                if (parseInt(msg)) { 
                     
                    var str = "
" + msg + "." + txt + "
——" + user + "(刚刚)
"; 
                    $(".container").append(str); 
                    make_draggable($(".note")); 
                    $.fancybox.close(); 
                } else { 
                    $("#msg").html(msg); 
                } 
            }); 
            e.preventDefault(); 
        });
    删除便签条：
    $(".note").find(".close").click(function() { 
            var id = $(this).parents(".note").attr("data-id"); 
            $.get("ajax.php", {id: id}, function(data) { 
                if (data == 1) { 
                    $("#note_"+id).fadeOut(); 
                } 
            }, "json") 
    })
    posts.php
    后台PHP接收ajax请求后，验证数据合法性，将数据插入数据表中，成功后返回插入的id值，返回给前台。
    $left = intval($_POST["left"]); 
    $top = intval($_POST["top"]); 
    $txt = stripslashes(trim($_POST["content"])); 
    $txt = htmlspecialchars($txt, ENT_QUOTES); 
    $txt = mysql_real_escape_string(strip_tags($txt), $link); //过滤HTML标签，并转义特殊字符 
    if (strlen($txt) < 1 || strlen($txt) > 100) { 
        echo "内容长度为1~100字符之间"; 
        exit; 
    } 
    $user = stripslashes(trim($_POST["user"])); 
    $user = htmlspecialchars($user, ENT_QUOTES); 
    $user = mysql_real_escape_string(strip_tags($user), $link); 
    if (strlen($user) < 2 || strlen($user) > 30) { 
        echo "姓名长度为2~10字符之间"; 
        exit; 
    } 
     
    $color = $_POST["color"]; 
    $time = date("Y-m-d H:i:s"); 
    $zIndex = $_POST["zIndex"];//堆叠顺序值 
    $xyz = "" . $left . "|" . $top . "|" . $zIndex; 
    $query = mysql_query("insert into notes(content,name,color,xyz,addtime)values("$txt","$user","$color","$xyz","$time")"); 
    if ($query) { 
        echo mysql_insert_id($link); 
    } else { 
        echo "出错了！"; 
    }

演示下载地址：http://www.erdangjiade.com/js...