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PHP和MYSQL相互链接

2016-06-02 19:44 330 查看

CREATE DATABASE my_to_do_list;

use my_to_do_list;

CREATE TABLE users(

id int(10) UNSIGNED NOT NULL AUTO_INCREMENT,

username VARCHAR(16) NOT NULL,

email VARCHAR(100) NOT NULL,

password VARCHAR(40) NOT NULL,

PRIMARY KEY(id)

)CHARSET=utf8;

SHOW tables;

describe users;

CREATE TABLE items(

id int(10) unsigned NOT NULL AUTO_INCREMENT PRIMARY KEY,

title varchar(50) NOT NULL,

description tinytext NOT NULL,

complete_by date,

complete_on date,

user_id int(10) unsigned NOT NULL,

CONSTRAINT FOREIGN KEY (user_id) REFERENCES users(id)

)CHARSET=utf8;

index.php

list.php

signup.php

signout.php

连接MYSQL

加密用户密码

insert into users values(2,’bob’,’bob@qq.com’,sha1(‘1234’));

index.php

<!DOCTYPE html>
<html>

<head>
<title>登入</title>
<meta charset="utf-8">
</head>
<?php function checkBOM($filename) {
global $auto;
$contents = file_get_contents ( $filename );
$charset [1] = substr ( $contents, 0, 1 );
$charset [2] = substr ( $contents, 1, 1 );
$charset [3] = substr ( $contents, 2, 1 );
if (ord ( $charset [1] ) == 239 && ord ( $charset [2] ) == 187 && ord ( $charset [3] ) == 191) {
if ($auto == 1) {
$rest = substr ( $contents, 3 );
rewrite ( $filename, $rest );
echo "BOM found, automatically removed.";
} else {
echo "BOM found.";
}
}
else
echo "BOM Not Found.";
} ?>

<?

@session_start();
if(isset($_POST['username'])&&($_POST['password'])){
$qw=new mysqli('127.0.0.1','root','1234','my_to_do_list',3306);
$qw->set_charset('utf8');
if($qw->connect_errno){
echo "problem";
echo exit();
}else{
$password=$_POST['password'];
$username=$_POST['username'];
$query="select id,username from users where username='".$username."' and password='".sha1($password)."'";
$result=$qw->query($query);
if($result->num_rows){
echo '欢迎你';
$row=$result->fetch_assoc();
$_SESSION['userid']=$row['id'];
$_SESSION['username']=$row['username'];
$result->free();
}else{
echo '不欢迎你';
}
$qw->close();
}

}

if($_SESSION['userid']){
require_once('list.php');
}else{
echo "<form action='index.php' method='post'>";
echo "<label><span>用户名</span><input type='text' name='username'/></label>";
echo "<label><span>密码</span><input type='password' name='password'/></label>";
echo "<input type='submit' value='登入'> ";
echo "</form>";
echo "<a href='signup.php'>注册</a>";
}

?>
</html>

signup.php

<!DOCTYPE html>
<html>
<head>
<title>注册</title>
<meta charset="utf-8">
</head>

<?php
if(isset($_POST['username'])&&isset($_POST['password'])&&isset($_POST['passwordd'])&&isset($_POST['email'])){
if($_POST['password']==$_POST['passwordd']){
$qw=new mysqli('127.0.0.1','root','1234','my_to_do_list');
if($qw->connect_errno){
echo 'no';
}else{

$username=$_POST['username'];
$email=$_POST['email'];
$password=$_POST['password'];
$query="INSERT INTO  users VALUES(null,'".$username."','".$email."','".sha1($password)."') ";
$result=$qw->query($query);
if($result){
echo '登记成功';
}else{
echo '登记不成功';
}
}
}else{
echo '密码不一致';

}
}else{
echo "<form action='signup.php' method='post'>";
echo "<label><span>用户名</span><input type='text' name='username'/></label>";
echo "<br>";
echo "<label><span>邮箱</span><input type='email' name='email'/></label>";
echo "<br>";
echo "<label><span>密码</span><input type='password' name='password'/></label>";
echo "<br>";
echo "<label><span>重新输入密码</span><input type='password' name='passwordd'/></label>";
echo "<br>";
echo "<input type='submit' value='注册'> ";
echo "</form>";
}

?>

</html>

list.php

<!DOCTYPE html>
<html>
<head>
<title>列表</title>
<meta charset="utf-8">
</head>

<?php
@session_start();
$current_user=$_SESSION['username'];
$current_userid=$_SESSION['userid'];

$query="select *from items where user_id=$current_userid";
$qw=new mysqli('127.0.0.1','root','1234','my_to_do_list',3306);
$qw->set_charset('utf8');
if($qw->connect_errno){
echo 'no';
exit();

}else{

$result=$qw->query($query);
if($result->num_rows){
echo "<table>";
for($i=1;($row=$result->fetch_assoc());$i++){
echo "<tr>";
echo "<td>$i</td>";
echo "<td>".$row['title']."</td>";
echo "<td>".$row['description']."</td>";
echo "<td>";
if(!$row['complete_by']){
echo '无限期限';
}else{
echo $row['complete_by'];
}
echo "</td>";

echo "</tr>";

}
echo "</table>";
}

}

?>

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