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PHP database addition, deletion, modification and query methods
PHP database addition, deletion, modification and query methods
First create a database db_0808, and import the table student in db_0808 into the web page.
CURD.php
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Title</title>
</head>
<body>
<?php
$db = new Mysqli("localhost","root","root","db_0808");
//!$db?"":die("链接错误");
empty(mysqli_connect_error())?"":die("链接错误");
$sql = "select * from student where is_delete='0'";
//$data = $db->query($sql)->fetch_all();//索引数组形式的所有数据
?>
<table border="1">
<tr>
<td>id</td>
<td>名字</td>
<td>性别</td>
<td>班级</td>
<td>生日</td>
<td>操作</td>
</tr>
<?php
$result=$db->query($sql);
while ($data=$result->fetch_row()){ //索引数组形式的第一条数据
// foreach ($data as $i){
if ($data[2]==1){
$data[2]="男";
}else if ($data[2]==0){
$data[2]="女";
}else{
$data[2]="保密";
}
echo "<tr>
<td>{$data[0]}</td>
<td>{$data[1]}</td>
<td>{$data[2]}</td>
<td>{$data[3]}</td>
<td>{$data[4]}</td>
<td><a href='delete.php?id={$data[0]}'>删除</a>
<a href='xiugai.php?id={$data[0]}'>修改</a>
</td>
</tr>";
}
?>
</table>
<a href="add.php">新增用户</a>
</body>
</html>Add new information to the database add.php
##
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post" action="addpost.php">
<input type="text" name="name" placeholder="姓名">
<input type="radio" name="sex" value="1" id="man"><label for="man">男</label>
<input type="radio" name="sex" value="0" id="nv"><label for="nv">女</label>
<input type="text" name="banji" placeholder="班级">
<!-- <input type="text" name="age" placeholder="年龄">-->
<input type="text" name="birthday" placeholder="出生年月">
<input type="submit" value="提交">
</form>
</body>
</html><?php
/**
* Created by fcc
* User: Administrator
* Date: 2017/10/13
* Time: 15:49 */$name = $_POST['name'];//
var_dump($name);
$sex = $_POST['sex'];
$ban=$_POST['banji'];//
$age = $_POST['age'];
$birthday = $_POST['birthday'];
$db=new Mysqli("localhost","root","root","db_0808");
$sql = "INSERT INTO student VALUES (null,'{$name}',{$sex},{$ban},'{$birthday}',DEFAULT,null)";
if ($db->query($sql)){header("location:CURD.php");
}else{ header("location:add.php");
}<?php/**
* Created by fcc
* User: Administrator
* Date: 2017/10/14
* Time: 10:56 */$id=$_GET['id'];$db=new Mysqli("localhost","root","root","db_0808");empty(mysqli_connect_error())?"":die("链接错误");//$sql="DELETE FROM student WHERE Sno='{$id}'";//彻底删除，数据库中内容删除$sql = "update student set is_delete = '1' where Sno= '{$id}'";//表面删除,数据库中内容仍存在if ($db->query($sql)){ header("location:CURD.php");
};<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<?php
$s = null;if(isset($_GET['id'])){
$id = $_GET['id'];
$db=new Mysqli("localhost","root","root","db_0808");
empty(Mysqli_connect_error())?"":die("连接错误");
$sql="select * from student where Sno='{$id}'";
$r=$db->query($sql);//var_dump($r);
$s=$r->fetch_row();
}?>
<form method="post" action="xiugaichuli.php">
<input type="hidden" name="id" value="<?php echo $s[0]?>">
<input type="text" name="name" placeholder="<?php echo $s[1]?>">
<input type="radio" name="sex" value="0" <?php echo $s[2]?"":"checked='checked'"; ?> id="nv"><label for="nv">女</label>
<input type="radio" name="sex" value="1" <?php echo $s[2]?"checked='checked'":""; ?> id="nan"><label for="nan">男</label>
<input type="text" name="banji" placeholder="<?php echo $s[3]?>">
<!-- <input type="text" name="age" placeholder="年龄">-->
<input type="text" name="birthday" placeholder="<?php echo $s[4]?>">
<input type="submit" value="提交">
</form>
</body>
</html><?php
/**
* Created by fcc
* User: Administrator
* Date: 2017/10/17
* Time: 9:07
*/
$id=$_POST['id'];
$name=$_POST['name'];
$sex=$_POST['sex'];
$banji=$_POST['banji'];
$birthday=$_POST['birthday'];
$db=new Mysqli("localhost","root","root","db_0808");
empty(Mysqli_connect_error())?"":"连接错误";
$sql="UPDATE student SET Sname='{$name}',Ssex='{$sex}',class='{$banji}',birthday='{$birthday}'WHERE Sno='{$id}'";
//var_dump($sql);
if ($db->query($sql)){
header("location:CURD.php");
}The above is the detailed content of PHP database addition, deletion, modification and query methods. For more information, please follow other related articles on the PHP Chinese website!
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