


Data operation: data operation classes and paging classes used by phpfans message board
Copy the code The code is as follows:
class mysql{
function connect($dbhost, $dbuser, $dbpw, $dbname = '',$dbcharset='') {
if(!@mysql_connect($dbhost, $dbuser, $dbpw)) {
$this->show('Can not connect to MySQL server');
}
if($dbname) {
$this->select_db($dbname);
}
if($this->version() > '4.1') {
if($dbcharset) {
$this->query("SET NAMES '".$dbcharset."'");
}
}
}
function select_db($dbname) {
return mysql_select_db($dbname);
}
function fetch_array($query, $result_type = MYSQL_ASSOC) {
return @mysql_fetch_array($query, $result_type);
}
function query($sql, $type = '') {
if(!($query = mysql_query($sql))) $this->show('MySQL Query Error', $sql);
return $query;
}
function affected_rows() {
return mysql_affected_rows();
}
function result($query, $row) {
return mysql_result($query, $row);
}
function num_rows($query) {
return @mysql_num_rows($query);
}
function num_fields($query) {
return mysql_num_fields($query);
}
function free_result($query) {
return mysql_free_result($query);
}
function insert_id() {
return mysql_insert_id();
}
function fetch_row($query) {
return mysql_fetch_row($query);
}
function version() {
return mysql_get_server_info();
}
function close() {
return mysql_close();
}
function show($message = '', $sql = '') {
if(!$sql) echo $message;
else echo $message.'
'.$sql;
}
}
class page extends mysql{
function pagination($sql,$maxnum,$page,$maxpages,$pagepre,$ext=''){
global $sum,$stail,$link,$lmid,$ltail,$curpage;//$ext='&class=3'
$SELF = $_SERVER['PHP_SELF'];
$query = $this->query($sql);
$rows = $this->fetch_array($query,MYSQL_NUM);
$totalrows = $rows[0];
$totalpages = ceil($totalrows/$maxnum);
$startnum = ($page - 1)*$maxnum;
$string = $sum.$totalrows.$stail.$sum.$page."/".$totalpages.$stail;
if($page != 1){
$string .= $link.$SELF."?page=1".$ext.$lmid."|‹".$ltail;
$string .= $link.$SELF.'?page='.($page - 1).$ext.$lmid."‹‹".$ltail;
}
if($maxpages>=$totalpages){
$pgstart = 1;$pgend = $totalpages;
}
elseif(($page-$pagepre-1+$maxpages)>$totalpages){
$pgstart = $totalpages - $maxpages + 1;
$pgend = $totalpages;
}
else{
$pgstart=(($page $pgend=(($pgstart==1)?$maxpages:($pgstart+$maxpages-1));
}
for($pg=$pgstart;$pg if($pg == $page){
$string .= $curpage.$SELF."?page=".$pg.$ext.$lmid.$pg.$ltail;
}
else $string .= $link.$SELF."?page=".$pg.$ext.$lmid.$pg.$ltail;
}
if($page != $totalpages){
$string .= $link.$SELF.'?page='.($page + 1).$ext.$lmid."››".$ltail;
$string .= $link.$SELF.'?page='.$totalpages.$ext.$lmid."›|".$ltail;
}
return $string;
}
}
function html($str){
$str = get_magic_quotes_gpc()?$str:addslashes($str);
return $str;
}
function dehtml($str){
$str = nl2br(stripslashes($str));
return $str;
}
function deip($str){
$arr = explode('.',$str);
$str = $arr[0].'.'.$arr[1].'.'.$arr[2].'.*';
return $str;
}
以上就介绍了数据操作 phpfans留言版用到的数据操作类和分页类,包括了数据操作方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

To protect the application from session-related XSS attacks, the following measures are required: 1. Set the HttpOnly and Secure flags to protect the session cookies. 2. Export codes for all user inputs. 3. Implement content security policy (CSP) to limit script sources. Through these policies, session-related XSS attacks can be effectively protected and user data can be ensured.

Methods to optimize PHP session performance include: 1. Delay session start, 2. Use database to store sessions, 3. Compress session data, 4. Manage session life cycle, and 5. Implement session sharing. These strategies can significantly improve the efficiency of applications in high concurrency environments.

Thesession.gc_maxlifetimesettinginPHPdeterminesthelifespanofsessiondata,setinseconds.1)It'sconfiguredinphp.iniorviaini_set().2)Abalanceisneededtoavoidperformanceissuesandunexpectedlogouts.3)PHP'sgarbagecollectionisprobabilistic,influencedbygc_probabi

In PHP, you can use the session_name() function to configure the session name. The specific steps are as follows: 1. Use the session_name() function to set the session name, such as session_name("my_session"). 2. After setting the session name, call session_start() to start the session. Configuring session names can avoid session data conflicts between multiple applications and enhance security, but pay attention to the uniqueness, security, length and setting timing of session names.

The session ID should be regenerated regularly at login, before sensitive operations, and every 30 minutes. 1. Regenerate the session ID when logging in to prevent session fixed attacks. 2. Regenerate before sensitive operations to improve safety. 3. Regular regeneration reduces long-term utilization risks, but the user experience needs to be weighed.

Setting session cookie parameters in PHP can be achieved through the session_set_cookie_params() function. 1) Use this function to set parameters, such as expiration time, path, domain name, security flag, etc.; 2) Call session_start() to make the parameters take effect; 3) Dynamically adjust parameters according to needs, such as user login status; 4) Pay attention to setting secure and httponly flags to improve security.

The main purpose of using sessions in PHP is to maintain the status of the user between different pages. 1) The session is started through the session_start() function, creating a unique session ID and storing it in the user cookie. 2) Session data is saved on the server, allowing data to be passed between different requests, such as login status and shopping cart content.

How to share a session between subdomains? Implemented by setting session cookies for common domain names. 1. Set the domain of the session cookie to .example.com on the server side. 2. Choose the appropriate session storage method, such as memory, database or distributed cache. 3. Pass the session ID through cookies, and the server retrieves and updates the session data based on the ID.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Atom editor mac version download
The most popular open source editor

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.