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Pembangunan PHP sistem pengurusan belakang buku ringkas kod lengkap untuk fungsi pengubahsuaian kata laluan

Tetapkan halaman untuk menentukan sama ada pentadbir telah log masuk. Fail ly_check.php 

<?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>";
}
?>

Pernyataan require_once adalah sama dengan pernyataan memerlukan Satu-satunya perbezaan ialah PHP akan menyemak sama ada fail itu ada telah disertakan. Jika ya, ia tidak akan Dikandung lagi.

Letakkan gaya CSS ke dalam fail css.CSS dan panggilnya dalam fail kemudian. 

<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>

Berikut menunjukkan kod lengkap untuk pentadbir menukar kata laluan log masuk halaman ly_pwd.php

<?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>


Meneruskan pembelajaran
||
<?php require_once('ly_check.php'); //引入ly_check.php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 --> <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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