Use PHP to implement simple additions, deletions, modifications and queries in the database (pure code, to be improved), PHP additions and deletions
![Use PHP to implement simple additions, deletions, modifications and queries in the database (pure code, to be improved), php additions and deletions_PHP tutorial]()
php
$con =
mysql_connect("localhost:3306","root",""
);
if (!
$con) {
die('Could not connect: ' .
mysql_error());
}
mysql_select_db("test",
$con);
$result =
mysql_query("SELECT * FROM user"
);
echo "
| Username |
Password |
";
while($row = mysql_fetch_array($result)) {
echo "";
echo "| " . $row['username'] . " | ";
echo "" . $row['password'] . " | ";
echo "
";
}
echo "
";
mysql_close($con);
?>
Get all user information (SQL SELECT statement) from the server and present it in table form
![Use PHP to implement simple additions, deletions, modifications and queries in the database (pure code, to be improved), php additions and deletions_PHP tutorial]()
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);
?>
Delete all information of this user delete.php
![Use PHP to implement simple additions, deletions, modifications and queries in the database (pure code, to be improved), php additions and deletions_PHP tutorial]()
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);
?>
Register a new user insert.php
![Use PHP to implement simple additions, deletions, modifications and queries in the database (pure code, to be improved), php additions and deletions_PHP tutorial]()
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);
?>
Change a user’s password update.php
![Use PHP to implement simple additions, deletions, modifications and queries in the database (pure code, to be improved), php additions and deletions_PHP tutorial]()
<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>Deleteh1>
<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>Updateh1>
<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
http://www.bkjia.com/PHPjc/1030847.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/1030847.htmlTechArticle用PHP向数据库中实现简单的增删改查（纯代码，待完善），php增删 ? php $con = mysql_connect ("localhost:3306","root","" ); if (! $con ) { die ('Could not con...
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