PHP 页面中实现数据的增删改查

main页面(主页面)

<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td>代号</td>
<td>姓名</td>
<td>性别</td>
<td>民族</td>
<td>生日</td>
<td>操作</td>
</tr>

<?php
$db = new MySQLi("localhost","root","","mydb");
!mysqli_connect_error() or die("连接失败");
$sql = "select * from Info";
$result = $db->query($sql);
$attr = $result->fetch_all();
foreach($attr as $v)
{
    $sex = $v[2]? '男':'女';
    $sqln = "select Name from Nation where Code ='$v[3]'";
    $rnation = $db ->query($sqln);
    $attrn = $rnation->fetch_assoc();
    echo "<tr>
    <td>{$v[0]}</td>
    <td>{$v[1]}</td>
    <td>{$sex}</td>
    <td>{$attrn['Name']}</td>
    <td>{$v[4]}</td>
    <td>
       <a href='Delete.php?code={$v[0]}'>删除</a>
       <a href='Update.php?code={$v[0]}'>修改</a>
    </td>
    </tr>";
}
?>

</table>
<div><a href="Add.php">添加数据</a></div>

Add(添加数据页面)

 <h1>添加数据</h1>
 <form action="AddChuLi.php" method="post">
     <div>代号：<input type="text" name="code" /></div>
     <div>姓名：<input type="text" name="name" /></div>
     <div>性别：
          <input type="radio" value="男" name="sex" />男
          <input type="radio" value="女" name="sex" />女
     </div>
     <div>民族:
          <select name="nation">
          <?php
          $db = new MySQLi("localhost","root","","mydb");
          !mysqli_connect_error() or die("连接失败！");
          $sql = "select * from Nation";
          $r = $db->query($sql);
          $att = $r->fetch_all();
          foreach($att as $v)
          {
              echo "<option value='{$v[0]}'>{$v[1]}</option>";
          }
          ?>
          </select>
     </div>
     <div>生日：<input type="text" name="birthday" /></div>
     <div><input type="submit" value="添加数据" /></div>
 </form>

AddChuLi页面（添加数据处理页面）

 <?php
 $code = $_POST["code"];
 $name = $_POST["name"];
 $sex  = $_POST["sex"];
 $s = 1;
 if($sex =="女")
 {
     $s=0;
 }
 $nation = $_POST["nation"];
 $birthday = $_POST["birthday"];
 $db = new MySQLi("localhost","root","","mydb");
 !mysqli_connect_error() or die("连接失败！");
 $sql = "insert into Info values('{$code}','{$name}','{$s}','{$nation}','{$birthday}')";
 $result = $db->query($sql);
 if($result)
 {
     header("location:main.php");
 }
 else
 {
     echo "添加失败！";
 }

Delete页面（删除数据页面）

 <?php
 $code = $_GET["code"];
 $db = new MySQLi("localhost","root","","mydb");
 !mysqli_connect_error() or die("连接失败！");
 $sql = "delete from Info where Code ='{$code}'";
 $r = $db->query($sql);
 if($r)
 {
     header("location:main.php");
 }
 else
 {
     echo "删除失败！";
 }

Update页面（修改数据页面）

 <h1>修改数据</h1>
 <?php
 $code = $_GET["code"];
 $db = new MySQLi("localhost","root","","mydb");
 !mysqli_connect_error() or die("连接失败！");
 $sql1 = "select * from Info where Code='{$code}'";
 $r1 = $db->query($sql1);
 $att1 = $r1->fetch_row();

 ?>
 <form action="UpdateChuLi.php" method="post">
     <div>代号：<input type="hidden" name="code" value="<?php echo $att1[0] ?>" /></div>
     <div>姓名：<input type="text" name="name" value="<?php echo $att1[1] ?>" /></div>
     <div>性别：
          <input type="radio" value="男" name="sex" <?php echo $att1[2] ? "checked='checked'" : ""; ?> />男
          <input type="radio" value="女" name="sex" <?php echo $att1[2] ? "" : "checked='checked'"; ?> />女
     </div>
     <div>民族:
          <select name="nation">
          <?php
          $db = new MySQLi("localhost","root","","mydb");
          !mysqli_connect_error() or die("连接失败！");
          $sql = "select * from Nation";
          $r = $db->query($sql);
          $att = $r->fetch_all();
          foreach($att as $v)
          {
              if($att1[3]==$v[0])
              {
                  echo "<option value='{$v[0]}' selected='selectec' >{$v[1]}</option>";
              }
              else
              {
                  echo "<option value='{$v[0]}'>{$v[1]}</option>";
              }

          }
          ?>
          </select>
     </div>
     <div>生日：<input type="text" name="birthday" value="<?php echo $att1[4] ?>"/></div>
     <div><input type="submit" value="修改数据" /></div>
 </form>

UpdateChuLi页面（修改数据处理页面）

 <?php
 $code = $_POST["code"];
 $name = $_POST["name"];
 $sex  = $_POST["sex"];
 $s=1;
 if($sex=="女")
 {
     $s=0;
 }
 $nation = $_POST["nation"];
 $birthday = $_POST["birthday"];
 $db = new MySQLi("localhost","root","","mydb");
 !mysqli_connect_error() or die("连接失败！");
 $sql = "update Info set Name='{$name}',Sex={$s},Nation='{$nation}',Birthday='{$birthday}' where Code='{$code}'";
 $r = $db->query($sql);
 if($r)
 {
     header("location:main.php");
 }
 else
 {
     echo "修改失败！";
 }