PHP开发简单图书后台管理系统修改密码功能完整代码
设置一个判断管理员是否登陆的页面ly_check.php文件
<?php
require_once("config.php"); //引入数据库文件
if($_SESSION["admin"]=="")
{
echo "<script language=javascript>alert('请重新登陆！');window.location='login.php'</script>";
}
?>require_once 语句和 require 语句完全相同，唯一区别是 PHP 会检查该文件是否已经被包含过，如果是则不会再次包含。
把CSS样式放入一个css.CSS文件中，以后再文件中调用即可。
<style>
.table{
border: 1px solid #CAF2FF;/*边框颜色*/
margin-top: 5px;
margin-bottom: 5px;
background:#a8c7ce;
}
.td_bgf {
background:#d3eaef;
color:#000000;
}
.td_bg {
background:#ffffff;
color:#344b50;
}
.ACT_btn {
height:26px;
width:94px;
cursor:hand;
border:solid 0 #111;
font-size: 12px;
}
.bg_tr {
font-family: "微软雅黑,Verdana, 新宋体";
color:#e1e2e3;/*标题字体色*/
font-size:12px;
font-weight:bolder;
background:#353c44;/*标题背景色*/
line-height: 22px;
}
td {
color:#1E5494;
font-size:12px;
line-height: 18px;
}
.tdbg1 {
background:#F9F9F9;
}
.tdbg {
BACKGROUND: #ffffff;
}
.top_link{text-decoration:none;font-size:14px;color:#FFDED2;height:0;filter:dropshadow(offX=1,offY=1,color=BD3400);}
A.top_link:link{text-decoration:none;font-size:14px;color:#FFDED2;height:0;filter:dropshadow(offX=1,offY=1,color=BD3400);}
A.top_link:visited{text-decoration:none;font-size:14px;color:#FFDED2;height:0;filter:dropshadow(offX=1,offY=1,color=BD3400);}
A.top_link:active{text-decoration:underline;font-size:14px;color:#fff;height:0;filter:dropshadow(offX=1,offY=1,color=BD3400);}
A.top_link:hover{text-decoration:underline;font-size:14px;color:#fff;height:0;filter:dropshadow(offX=1,offY=1,color=BD3400);}
.topbar {color:#ffffff}
.topbar a:link,.topbar a:visited{color:#ffffff;}
.topbar a:hover{background:#ccffcc; display:block; height:26px; padding-top:6px; color:#000000; text-decoration:none}
#table2 {
width:100%;
height:30px;
border-bottom : 1px solid #fff;
background-color: #6E4000;
}
.titledaohang {
FONT-SIZE: 12px;
COLOR: #551C02;
font-weight:bolder;
FONT-FAMILY: '微软雅黑,宋体'
}
.Leftback {
background:#865802;
}
.leftframetable{
border: 1px solid #4C3500;
margin-top: 3px;
margin-bottom: 3px;
background:#FDF6E6;
}
</style>下面展示管理员修改登录密码ly_pwd.php页面完整代码
<?php require_once('ly_check.php');
//引入判断管理员是否登录文件
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>管理员密码修改</title>
<!-- 引入CSS样式文件 -->
<link href="css.css" rel="stylesheet" type="text/css">
</head>
<body>
<?php
$password = $_SESSION["pwd"];
$SQL = "SELECT * FROM admin where password='$password'";
$rs = mysqli_query($link,$sql);
$rows = mysqli_fetch_assoc($rs);
$submit = isset($_POST["Submit"])?$_POST["Submit"]:"";
if($submit)
{
if($rows["password"]==$_POST["password"])
{
$password2=$_POST["password2"];
$SQL = "UPDATE admin SET password='$password2' where id=1";
mysqli_query($link,$sql);
echo "<script>alert('修改成功,请重新进行登陆！');window.location='login.php'</script>";
exit();
}
else
?>
<?php
{
?>
<script>
alert("原始密码不正确,请重新输入")
//location.href="li_pwd.php";
</script>
<?php
}
}
?>
<table cellpadding="3" cellspacing="1" border="0" width="100%" class="table" align=center>
<form name="renpassword" method="post" action="">
<tr>
<th height=25 colspan=4 align="center" class="bg_tr">更改管理密码</th>
</tr>
<tr>
<td width="40%" align="right" class="td_bg">用户名：</td>
<td width="60%" class="td_bg"><?php echo $rows["username"] ?></td>
</tr>
<tr>
<td align="right" class="td_bg">原密码：</td>
<td class="td_bg"><input name="password" type="password" id="password" size="20"></td>
</tr>
<tr>
<td align="right" class="td_bg">新密码：</td>
<td class="td_bg"><input name="password1" type="password" id="password1" size="20"></td>
</tr>
<tr>
<td align="right" class="td_bg">确认密码：</td>
<td class="td_bg"><input name="password2" type="password" id="password2" size="20"></td>
</tr>
<tr>
<td colspan="2" align="center" class="td_bg">
<input class="button" onClick="return check();" type="submit" name="Submit" value="确定更改">
</td>
</tr>
</form>
</table>
</body>
</html>
<script type="text/javascript">
<!--
function checkspace(checkstr) {
var str = '';
for(i = 0; i < checkstr.length; i++) {
str = str + ' ';
}
return (str == checkstr);
}
function check()
{
if(checkspace(document.renpassword.password.value)) {
document.renpassword.password.focus();
alert("原密码不能为空！");
return false;
}
if(checkspace(document.renpassword.password1.value)) {
document.renpassword.password1.focus();
alert("新密码不能为空！");
return false;
}
if(checkspace(document.renpassword.password2.value)) {
document.renpassword.password2.focus();
alert("确认密码不能为空！");
return false;
}
if(document.renpassword.password1.value != document.renpassword.password2.value) {
document.renpassword.password1.focus();
document.renpassword.password1.value = '';
document.renpassword.password2.value = '';
alert("新密码和确认密码不相同，请重新输入");
return false;
}
document.admininfo.submit();
}
//-->
</script>
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自学的困难只有自己知道，如何让学习不再困难让学习提高效率
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