CREATE TABLE sessions (
id CHAR(32) NOT NULL,
data TEXT,
last_accessed TIMESTAMP NOT NULL,
PRIMARY KEY (id)
);
<?php
/**
* Created by PhpStorm.
* User: michaeldu
* Date: 15/7/14
* Time: 下午2:57
*/
$sdbc = NULL;
function open_session() {
global $sdbc;
$sdbc = mysqli_connect('192.168.31.172', 'root', 'root', 'phpadvanced');
return true;
}
function close_session() {
global $sdbc;
return mysqli_close($sdbc);
}
function read_session($sid) {
global $sdbc;
$q = sprintf('SELECT data FROM sessions WHERE id="%s"', mysqli_real_escape_string($sdbc, $sid));
$r = mysqli_query($sdbc, $q);
if (mysqli_num_rows($r) == 1) {
list($data) = mysqli_fetch_array($r, MYSQLI_NUM);
return $data;
} else {
return '';
}
}
function write_session($sid, $data) {
global $sdbc;
$q = sprintf('REPLACE INTO sessions (id, data) VALUES ("%s", "%s")', mysqli_real_escape_string($sdbc, $sid), mysqli_real_escape_string($sdbc, $data));
$r = mysqli_query($sdbc, $q);
return true;
}
function destroy_session($sid) {
global $sdbc;
$q = sprintf('DELETE FROM session WHERE id="%s"', mysqli_real_escape_string($sdbc, $sid));
$r = mysqli_query($sdbc, $q);
$_SESSION = array();
return true;
}
function clean_session($expire) {
global $sdbc;
$q = sprintf('DELETE FROM sessions WHERE DATE_ADD(last_accessed, INTERVAL %d SECOND) < NOW()', (int)$expire);
$r = mysqli_query($sdbc, $q);
return true;
}
session_set_save_handler('open_session', 'close_session', 'read_session', 'write_session', 'destroy_session', 'clean_session');
session_start();
<?php
/**
* Created by PhpStorm.
* User: michaeldu
* Date: 15/7/14
* Time: 下午3:14
*/
require('db_session.inc.php');
?>
<!DOCTYPE HTML>
<html>
<head>
<title>colour_blue</title>
<meta name="description" content="website description" />
<meta name="keywords" content="website keywords, website keywords" />
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="/phpadvanced/02developwebapplication/style/style.css" title="style" />
</head>
<body>
<?php
if(empty($_SESSION)) {
$_SESSION['blah'] = 'umlaut';
$_SESSION['this'] = 3615684.45;
$_SESSION['that'] = 'blue';
echo '<p>Session已存储</p>';
} else {
echo '<p>SESSION已存在, <pre>'.print_r($_SESSION, 1).'</pre></p>';
}
if(isset($_GET['logout'])) {
session_destroy();
echo '<p>会话结束</p>';
} else {
echo '<a href="sessions.php?logout=true">登出</a>';
}
echo '<p>会话数据: <pre>'.print_r($_SESSION, 1).'</pre></p>';
?>
</body>
</html>
<?php
session_write_close();
?>
