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php增删数据库内容 php增删改查mysql实例

如何用PHP代码实现MySQL数据库的增删改查

?php

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$con = mysql_connect("localhost:3306","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

$result = mysql_query("SELECT * FROM user");

echo "table border='1'

tr

thUsername/th

thPassword/th

/tr";

while($row = mysql_fetch_array($result)) {

echo "tr";

echo "td" . $row['username'] . "/td";

echo "td" . $row['password'] . "/td";

echo "/tr";

}

echo "/table";

mysql_close($con);

?

从服务器中获取用户所有信息(SQL SELECT语句)并以表格形式出现

?php

$con = mysql_connect("localhost","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

mysql_query("DELETE FROM user WHERE username = '$_POST[username]'");

mysql_close($con);

?

删除该用户所有信息delete.php

?php

$con = mysql_connect("localhost:3306","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

$sql = "INSERT INTO user (username,password)

VALUES

('$_POST[username]','$_POST[password]')";

if (!mysql_query($sql,$con)) {

die('Error: ' . mysql_error());

}

echo "1 record added";

mysql_close($con);

?

注册一个新用户insert.php

?php

$con = mysql_connect("localhost","root","");

if (!$con) {

die('Could not connect: ' . mysql_error());

}

mysql_select_db("test", $con);

mysql_query("UPDATE user SET password = '$_POST[password]' WHERE username = '$_POST[username]'");

mysql_close($con);

?

修改一个用户密码update.php

html

head

titleFORM/title

/head

body

br /

h1Insert:/h1

form action="insert.php" method="post"

username:input type="name" name="username"/

br /

password:input type="password" name="password"/

input type="submit" value="submit"/

/form

br /hr /br /

h1Delete/h1

form action="delete.php" method="post"

username:input type="name" name="username" /

br /

Are you sure?input type="submit" value="sure" /

/form

br /hr /br /

h1Update/h1

form action="update.php" method="post"

username:input type="name" name="username"/

br /

You want to change your password into:input type="password" name="password"/

input type="submit" value="submit"/

/form

br /hr /br /

/body

/html

以上三个功能的提交源Operate.html

怎么在phpstorm中增删改查数据库里面的内容

Please define what do you mean by “delete the project”.

If you want to remove it from recently used list — close all projects in IDE, the main background screen will show you the recent list, where you can click on “x” button next to project name (when hovering over that project).

If you want to delete project from disk — do it in your file browser (Explorer, Finder etc) — all project settings are stored in.idea subfolder of the project folder (e.g. MY_PROJECT/.idea)、

但是没看到他说的X按钮。于是后面的回复:

Just use “Delete” key for that.

对,close all退出到一个screen之后,鼠标移到左侧项目列表,直接按delete键就可以删除了。

php数据库添加、删除、修改数据(mysql)

一、PHP操作MySql数据库

新增数据

?php

$query = "INSERT INTO grade (name,email,point,regdate) VALUE

(' 李三','yc60.com@gmail.com',,NOW())" ;

@mysql_query($query) or die( '添加数据出错:' .mysql_error());

?

修改数据

?php

$query = "UPDATE grade SET name='小可爱' WHERE id=6" ;

@mysql_query($query) or die( '修改出错:' .mysql_error());

?

删除数据

?php

$query = "DELETE FROM grade WHERE id=6";

@mysql_query($query) or die( '删除错误:' .mysql_error());

?

显示数据

?php

$query = "SELECT id,name,email,point FROM grade";

$result = @mysql_query($query) or die( '查询语句出错:' .mysql_error());

while (!! $row = mysql_fetch_array($result)) {

echo $row[ 'id' ]. '----' .$row['name' ].'----' .$row ['email' ]. '----' .$row['point' ];

echo 'br /';

}

?

二、其他常用函数

mysql_f etch_row() :从结果集中取得一行作为枚举数组

mysql_f etch_assoc() : 从结果集中取得一行作为关联数组

mysql_f etch_array() : 从结果集中取得一行作为关联数组,或数字数组,或二者兼有

mysql_f etch_lengths () : 取得结果集中每个输出的长度

mysql_f ield_name(): 取得结果中指定字段的字段名

mysql_num_rows(): 取得结果集中行的数目

mysql_num_f ields():取得结果集中字段的数目

mysql_get_client_inf o() : 取得 MySQL 客户端信息

mysql_get_host_info(): 取得 MySQL 主机信息

mysql_get_proto_info(): 取得 MySQL 协议信息

mysql_get_server_inf o() : 取得 MySQL 服务器信息


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