Article Introduction：Using the ideas introduced in "[Java] Singleton Mode" (click to open the link), you can turn this database link class into a singleton. This will not create a database query instance just because multiple users access the website, slowing down the entire website. This puts a lot of pressure on the website's database, causing the website's speed to drop significantly.

2018-03-29 comment 0  1693

Article Introduction：This article mainly introduces the singleton class of the Redis multi-library selection function implemented by PHP. It analyzes the multi-library selection function of the Redis database using singleton mode in PHP based on the example form. Friends in need can refer to the following

2018-05-19 comment 0  1876

Article Introduction：import MySQLdb#Introduce the mysql module class ManagerDB:#Create a class def __init__(self): self.db=None self.cursor=None self.connit() def connit(self):#Link to the database self.db=MySQLdb.connect (host='1

2017-06-27 comment 0  1631

Article Introduction：PHP writing program can connect to the database and output all the records of the table. How to output the last executed SQL of mysql using native PHP method one: $link=mysql_connect("192.168.1.1","myuser","mypass");-- Connect database if(FALSE==$link){echo＂Connectdatabasefailed!＂;}$query=＂select*fromaorderbyid＂;mysql_select_db('test',$link);--Select database$result=mysql_query(

2024-01-22 comment 0  1103

Article Introduction：With the development and popularization of Web technology, more and more websites use database paging technology to better display large amounts of data. As a commonly used PHP framework, ThinkPHP has naturally launched corresponding database paging extensions. This article will introduce how to use ThinkPHP6 to implement database paging. 1. ThinkPHP’s Paginator class First, we need to understand the Paginator class in ThinkPHP6. Paginator class is ThinkP

2023-06-20 comment 0  2020

Article Introduction：How PHP uses PDO to encapsulate simple and easy-to-use DB classes Introduction: In PHP development, the database is a very important part. In order to better operate the database, we can use PDO (PHP Data Objects) extension to connect, query and operate the database. This article will introduce how to use PDO to encapsulate a simple and easy-to-use DB class to facilitate developers to perform database operations. 1. Create DB class First, we create a DB class, which will encapsulate commonly used database operation methods. The code is as follows: classDB{

2024-02-26 comment 0  1286

Article Introduction：: This article mainly introduces PHP to connect to mysql database. Students who are interested in PHP tutorials can refer to it.

2016-07-29 comment 0  1109

Article Introduction：PHP is a popular web development language that has been used for a long time. The PDO (PHP Data Object) class integrated in PHP is a common way for us to interact with the database during the development of web applications. However, a problem that some PHP developers often encounter is that when using the PDO class to interact with the database, they receive an error like this: PHPFatalerror:CalltoundefinedmethodPDO::prep

2023-06-22 comment 0  1161

Article Introduction：Can arrays appear in php's where condition? In PHP language, we often use relational databases, such as MySQL, Oracle, etc. When we need to query data in the database, we usually use the WHERE condition to specify the scope of the query. In PHP, data query using WHERE conditions is generally implemented by splicing SQL statements. We can use PHP's built-in PDO class or mysqli class to connect to the database and execute SQL statements. For example when using mysqli class

2023-04-19 comment 0  724

Article Introduction：PHP is a popular programming language that helps programmers easily operate databases and query data. In this article, we will learn how to query data using PHP. First, we need to connect to the database. In PHP, we can use mysqli class or PDO class to connect to the database. Both classes provide methods for creating database connections, such as mysqli_connect() and PDO::__construct(). Next, we need to write the query statement. The query statement describes what we want from the database

2023-04-03 comment 0  1074

Article Introduction：: This article mainly introduces how PHP 5X uses its own sqlite3 link database and PDO link sqlite (low-cost development) (1). Students who are interested in PHP tutorials can refer to it.

2016-08-08 comment 0  1312

Article Introduction：This article introduces the content of php odbc link to sql server database. It has certain reference value. Now I share it with you. Friends in need can refer to it.

2018-04-26 comment 0  2845

Article Introduction：PHP object-oriented method of connecting to the database to implement additions, deletions and modifications: first create the Mysql class and define variables; then initialize the class through the constructor; then connect to the database and customize the method of inserting data; finally use the update and delete methods to modify or delete data.

2020-08-27 comment 0  3757

Article Introduction：PHP encapsulates a DB database mysql class sharing

2016-11-10 comment 0  967

Article Introduction：<?php /** * Mysqli class * * @author ruins * @version v1.0 2009-08-18 * @link http://anerg.cn/ */ class db_mysqli { protected $mysqli; p ...

2016-11-24 comment 0  1149

Article Introduction：<?php /** * Mysqli class * * @author ruins * @version v1.0 2009-08-18 * @link http://anerg.cn/ */ class db_mysqli { protected $mysqli; p ...

2016-11-23 comment 0  896

Article Introduction：PHP solution if there is no database in the array: 1. Create a PHP sample file; 2. Create a MySQL database and a link to the database, which is completed through the "mysql_connect()" function, whose syntax is "mysql_connect(servername, username, password) ;"; 3. Import the PHP file into the database and run the relevant code.

2023-05-25 comment 0  1004

Article Introduction：ThinkPHP is one of the more popular PHP frameworks currently and is widely used, especially in web back-end development. When using ThinkPHP to develop applications, we often need to query and count data in the database. This article will introduce the query counting of ThinkPHP5 in detail. 1. Query In ThinkPHP5, we can query the database through the `Db` class or the `Model` class. Here we take the `Model` class as an example. 1. For basic queries, we can use `select

2023-04-07 comment 0  930

Article Introduction：PHP realizes querying name, gender, class. In practical applications, many websites need to implement the function of querying user information, such as querying name, gender, class and other information. PHP, as a popular server-side scripting language, can be used to achieve this function. This article will introduce how to query name, gender, class and other information through PHP code. 1. Create a database Before using PHP to query user information, you need to create a database and a table to store user information. You can use MySQL or other types of databases. This article uses MySQL as an example. Can

2023-03-31 comment 0  1357

Article Introduction：mysqli::mysqli() Error: Connecting via Socket 'MySQL' FailsWhen attempting to establish a connection to a MySQL database using PHP's mysqli class,...

2024-12-02 comment 0  864