下面小编就为大家带来一篇使用php连接数据库_实现用户数据的增删改查的整体操作示例。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧
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>
<p>
<a href="add.php" rel="external nofollow" >添加数据</a>
</p>
add(添加数据页面)
<h1>添加数据</h1>
<form action="addchuli.php" method="post">
<p>代号：<input type="text" name="code" /></p>
<p>姓名：<input type="text" name="name" /></p>
<p>性别：
<input type="radio" value="男" name="sex" />男
<input type="radio" value="女" name="sex" />女
</p>
<p>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>
</p>
<p>生日：<input type="text" name="birthday" /></p>
<p><input type="submit" value="添加数据" /></p>
</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">
<p>代号：<input type="hidden" name="code" value="<?php echo $att1[0] ?>" /></p>
<p>姓名：<input type="text" name="name" value="<?php echo $att1[1] ?>" /></p>
<p>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
</p>
<p>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>
</p>
<p>生日：<input type="text" name="birthday" value="<?php echo $att1[4] ?>"/></p>
<p><input type="submit" value="修改数据" /></p>
</form>
atechuli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！";
}
以上就是php连接数据库实现用户数据的增删改查实例的详细内容。