php链数据库增删改查,php的增删改查语句

php怎么链接sqlserver数据库进行增删改查

php有专门的sql server操作函数，举个简单的例子，是查询的

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$serverName = "localhost"; //数据库服务器地址

$uid = "root"; //数据库用户名

$pwd = "123456"; //数据库密码

$connectionInfo = array("UID"=$uid, "PWD"=$pwd, "Database"='databasename');

$conn = sqlsrv_connect( $serverName, $connectionInfo);

if( $conn == false){

echo "连接数据库失败！";

die( print_r( sqlsrv_errors(), true));

}

$sql = "select * from user";

$query = sqlsrv_query( $conn, $sql , array(), array( "Scrollable" = SQLSRV_CURSOR_KEYSET ));

$num_rows = sqlsrv_num_rows($query);

if($num_rows  0){

while ($row = sqlsrv_fetch_array($query)){

echo $row['aaaa'];

}

}

其它的操作也同理，举一反三

php 使用pdo对mysql数据库增删改查实例

//连接、查询

try

{

$dbh

=

new

PDO('mysql:host=localhost;dbname=test',

$user,

$pass);

foreach($dbh-query('SELECT

*

from

FOO')

as

$row)

{

print_r($row);

}

$dbh

=

null;//释放资源

}

catch

(PDOException

$e)

{

print

"错误!:

"

.

$e-getMessage()

.

"br/br";

die();

}

//执行删除操作，插入、修改与此类似，更改SQL语句即可

$count

=

$dbh-exec("DELETE

FROM

fruit

WHERE

colour

=

'red'");

如何用PHP代码实现MySQL数据库的增删改查

?php

$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