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
举例如下:
创建userinfo_update.php页面用于查询用户信息,先显示信息,在修改:
先通过GET获取用户编号查询用户信息:
$sql = "select * from user_info where user_id='".$_GET['userId']."'"
$result = mysql_query($sql,$con)
if($row = mysql_fetch_array($result)){
}
页面效果:
创建update.php文件,用于修改用户信息:
使用到了mysql_affected_rows() 函数返回前一次 MySQL *** 作所影响的记录行数。
//通过post获取页面提交数据信息
$userId = $_POST[userId]
$userName = $_POST[userName]
$userAge = $_POST[userAge]
$sql = "update user_info set user_name='".$userName."',user_age=".$userAge." where user_id='".$userId."'"
mysql_query($sql,$conn)//执行SQL
$mark = mysql_affected_rows()//返回影响行数
$url = "userinf_select.php"
运行结果
创建delete.php文件,完成删除用户信息功能:
$userId = $_GET['userId']
include 'connection.php'
$sql = "delete from user_info where user_id='".$userId."'"
mysql_query($sql,$con)
$mark = mysql_affected_rows()//返回影响行数
if($mark>0){
echo "删除成功"
}else{
echo "删除失败"
}
mysql_close($con)
运行结果:
<?php$con = mysql_connect("localhost:3306","root","")
if (!$con) {
die('Could not connect: ' . mysql_error())
}
mysql_select_db("test", $con)
$result = mysql_query("SELECT * FROM user")
echo "<table border='1'>
<tr>
<th>Username</th>
<th>Password</th>
</tr>"
while($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>
<title>FORM</title>
</head>
<body>
<br />
<h1>Insert:</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 />
<h1>Delete</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 />
<h1>Update</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
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