利用PHP连接数据库——实现用户数据的增删改查的整体操作实例
Posted WORSHIP亚萨
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了利用PHP连接数据库——实现用户数据的增删改查的整体操作实例相关的知识，希望对你有一定的参考价值。
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");
if(mysqli_connect_error()){
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‘; //三元运算符判断性别
$sql = "select Name from Nation where Code =‘$v[3]‘";
$result = $db ->query($sql);
$attr = $result->fetch_assoc();
echo "<tr>
<td>{$v[0]}</td>
<td>{$v[1]}</td>
<td>{$sex}</td>
<td>{$attr[‘Name‘]}</td>
<td>{$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");
if(mysqli_connect_error()){
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");
if(mysqli_connect_error()){
die("连接失败");
}
$sql = "insert into Info values(‘{$code}‘,‘{$name}‘,‘{$s}‘,‘{$nation}‘,‘{$birthday}‘)"; //添加数据语句
$result = $db->query($sql);
if($result)
{
header("location:main.php"); //php跳转页面方式
}
else
{
echo "添加失败！";
}
DeleteChuLi页面（删除数据处理页面）
<?php
$code = $_GET["code"];
$db = new MySQLi("localhost","root","","mydb");
if(mysqli_connect_error()){
die("连接失败");
}
$sql = "delete from Info where Code =‘{$code}‘"; //删除语句
$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");
if(mysqli_connect_error()){
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");
if(mysqli_connect_error()){
die("连接失败");
}
$sql = "select * from Nation"; //查询nation一组数据
$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");
if(mysqli_connect_error()){
die("连接失败");
}
$sql = "update Info set Name=‘{$name}‘,Sex={$s},Nation=‘{$nation}‘,Birthday=‘{$birthday}‘ where Code=‘{$code}‘"; //修改数据语句
$r = $db->query($sql);
if($r)
{
header("location:main.php");
}
else
{
echo "修改失败！";
}
以上是关于利用PHP连接数据库——实现用户数据的增删改查的整体操作实例的主要内容，如果未能解决你的问题，请参考以下文章