A classic php mysql paging program_PHP tutorial
A classic php mysql paging program This article provides a PHP paging code. This is a relatively simple and common limit to paginate. At the same time, it also has a conditional query paging function.
A classic php tutorial mysql tutorial paging program
This article provides a PHP paging code. This is a relatively simple and common limit to paginate. At the same time, it also has a conditional query paging function.
*/
$conn=mysql_connect($mysql_host,$mysql_user,$mysql_password) or die('Error connecting to server');
mysql_select_db($mysql_db) or die("Error in selecting database tutorial");
mysql_query("set names 'gbk'");
function table($t)
{
global $mysql_table_prefix;
return $mysql_table_prefix.$t;
}
$sql="select * from ".table('keywords')." where 1=1 ";
$sql2="select count(*) from ".table('keywords')." where 1=1 ";
$py=trim($_request['py']);
if($act=="search" and !empty($_post['s1']))
{
$s1=trim($_post['s1']);//Get the search word
$sql .=" and (k1='$s1' or k2='$s1') ";
$sql2 .=" and (k1='$s1' or k2='$s1') ";
}
elseif(!empty($py))
{
$sql .=" and pinyin='$py' ";
$sql2.=" and pinyin='$py' ";
}
$sql .=" order by pinyin ";
$rscount=mysql_query($sql2);
$rscount=@mysql_fetch_array($rscount);
$rscount=$rscount[0];//Get the total number of records$page=trim($_get['page']);//Current page number
$pagesize=30;//Number of records per page
$pagecount=ceil($rscount/$pagesize);//Get the total number of pages
$pageurl="";
if($page<=1)
{
$page=1;
$pageurl.="Home Page Previous Page";
}else
{
$pageurl .=" Homepage Previous page";
}
if($page>=$pagecount)
{
$page=$pagecount;
$pageurl .="Next page Last page";
}else
{
$pageurl .=" Next page Last page";
}$start_rs=($page-1)*$pagesize;//Start
$end_rs=$page*$pagesize;//End
$sql .=" limit {$start_rs},{$end_rs} ";
$res=mysql_query($sql);?>
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
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1665
14
1423
52
1321
25
1269
29
1249
24
Explain the purpose of foreign keys in MySQL.
Apr 25, 2025 am 12:17 AM
In MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.
Compare and contrast MySQL and MariaDB.
Apr 26, 2025 am 12:08 AM
The main difference between MySQL and MariaDB is performance, functionality and license: 1. MySQL is developed by Oracle, and MariaDB is its fork. 2. MariaDB may perform better in high load environments. 3.MariaDB provides more storage engines and functions. 4.MySQL adopts a dual license, and MariaDB is completely open source. The existing infrastructure, performance requirements, functional requirements and license costs should be taken into account when choosing.
What happens if session_start() is called multiple times?
Apr 25, 2025 am 12:06 AM
Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.
MySQL: The Database, phpMyAdmin: The Management Interface
Apr 29, 2025 am 12:44 AM
MySQL and phpMyAdmin can be effectively managed through the following steps: 1. Create and delete database: Just click in phpMyAdmin to complete. 2. Manage tables: You can create tables, modify structures, and add indexes. 3. Data operation: Supports inserting, updating, deleting data and executing SQL queries. 4. Import and export data: Supports SQL, CSV, XML and other formats. 5. Optimization and monitoring: Use the OPTIMIZETABLE command to optimize tables and use query analyzers and monitoring tools to solve performance problems.
Composer: Aiding PHP Development Through AI
Apr 29, 2025 am 12:27 AM
AI can help optimize the use of Composer. Specific methods include: 1. Dependency management optimization: AI analyzes dependencies, recommends the best version combination, and reduces conflicts. 2. Automated code generation: AI generates composer.json files that conform to best practices. 3. Improve code quality: AI detects potential problems, provides optimization suggestions, and improves code quality. These methods are implemented through machine learning and natural language processing technologies to help developers improve efficiency and code quality.
What is the significance of the session_start() function?
May 03, 2025 am 12:18 AM
session_start()iscrucialinPHPformanagingusersessions.1)Itinitiatesanewsessionifnoneexists,2)resumesanexistingsession,and3)setsasessioncookieforcontinuityacrossrequests,enablingapplicationslikeuserauthenticationandpersonalizedcontent.
How to uninstall MySQL and clean residual files
Apr 29, 2025 pm 04:03 PM
To safely and thoroughly uninstall MySQL and clean all residual files, follow the following steps: 1. Stop MySQL service; 2. Uninstall MySQL packages; 3. Clean configuration files and data directories; 4. Verify that the uninstallation is thorough.
Steps to add and delete fields to MySQL tables
Apr 29, 2025 pm 04:15 PM
In MySQL, add fields using ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column, delete fields using ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop. When adding fields, you need to specify a location to optimize query performance and data structure; before deleting fields, you need to confirm that the operation is irreversible; modifying table structure using online DDL, backup data, test environment, and low-load time periods is performance optimization and best practice.
