php增删改查mysql实例(PHP用户注册增删改查)
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)
{
"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
=
$dbh-exec("DELETE
FROM
fruit
WHERE
colour
=
'red'");
学习WAMP，做一个PHP+MYSQL的简单的图书管理系统，实现增删改查功能，做到增就遇到问题
肯定有个什么地方少个括号，或者少了分号。
if(isset($_SERVER['QUERY_STRING'])){
????????$insertGoTo?.=?(strpos($insertGoTo,'?'))???""?:"?";
????????$insertGoTo?.=?$_SERVER['QUERY_STRING'];
????}
????header(sprintf("Location:?%s",$insertGoTo));
}
这里是不是最后多了一个大括号
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
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