php开发_链接mysql数据库的一个类
项目结构:
运行效果;
conn.php
1
2 class ConnectionMySQL{
3 //主机
4 private $host="localhost";
5 //数据库的username
6 private $name="root";
7 //数据库的password
8 private $pass="";
9 //数据库名称
10 private $table="phptest";
11 //编码形式
12 private $ut="utf-8";
13
14
15 //构造函数
16 function __construct(){
17 $this->ut=$ut;
18 $this->connect();
19
20 }
21
22 //数据库的链接
23 function connect(){
24 $link=mysql_connect($this->host,$this->name,$this->pass) or die ($this->error());
25 mysql_select_db($this->table,$link) or die("没该数据库:".$this->table);
26 mysql_query("SET NAMES '$this->ut'");
27 }
28
29 function query($sql, $type = '') {
30 if(!($query = mysql_query($sql))) $this->show('Say:', $sql);
31 return $query;
32 }
33
34 function show($message = '', $sql = '') {
35 if(!$sql) echo $message;
36 else echo $message.'
'.$sql;
37 }
38
39 function affected_rows() {
40 return mysql_affected_rows();
41 }
42
43 function result($query, $row) {
44 return mysql_result($query, $row);
45 }
46
47 function num_rows($query) {
48 return @mysql_num_rows($query);
49 }
50
51 function num_fields($query) {
52 return mysql_num_fields($query);
53 }
54
55 function free_result($query) {
56 return mysql_free_result($query);
57 }
58
59 function insert_id() {
60 return mysql_insert_id();
61 }
62
63 function fetch_row($query) {
64 return mysql_fetch_row($query);
65 }
66
67 function version() {
68 return mysql_get_server_info();
69 }
70
71 function close() {
72 return mysql_close();
73 }
74
75 //向$table表中插入值 www.2cto.com
76 function fn_insert($table,$name,$value){
77 $this->query("insert into $table ($name) value ($value)");
78 }
79 //根据$id值删除表$table中的一条记录
80 function fn_delete($table,$id,$value){
81 $this->query("delete from $table where $id=$value");
82 echo "id为". $id." 的记录被成功删除!";
83 }
84 }
85
86 $db = new ConnectionMySQL();
87
88 $db->fn_insert('test','id,name,sex',"'','hongtenzone','M'");
89 $db->fn_delete('test', 'id', 1);
90
91 ?>
摘自 Hongten

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

AI Hentai Generator
Generate AI Hentai for free.

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



MySQL is suitable for beginners because it is simple to install, powerful and easy to manage data. 1. Simple installation and configuration, suitable for a variety of operating systems. 2. Support basic operations such as creating databases and tables, inserting, querying, updating and deleting data. 3. Provide advanced functions such as JOIN operations and subqueries. 4. Performance can be improved through indexing, query optimization and table partitioning. 5. Support backup, recovery and security measures to ensure data security and consistency.

Navicat itself does not store the database password, and can only retrieve the encrypted password. Solution: 1. Check the password manager; 2. Check Navicat's "Remember Password" function; 3. Reset the database password; 4. Contact the database administrator.

Create a database using Navicat Premium: Connect to the database server and enter the connection parameters. Right-click on the server and select Create Database. Enter the name of the new database and the specified character set and collation. Connect to the new database and create the table in the Object Browser. Right-click on the table and select Insert Data to insert the data.

Common reasons why Navicat cannot connect to the database and its solutions: 1. Check the server's running status; 2. Check the connection information; 3. Adjust the firewall settings; 4. Configure remote access; 5. Troubleshoot network problems; 6. Check permissions; 7. Ensure version compatibility; 8. Troubleshoot other possibilities.

You can create a new MySQL connection in Navicat by following the steps: Open the application and select New Connection (Ctrl N). Select "MySQL" as the connection type. Enter the hostname/IP address, port, username, and password. (Optional) Configure advanced options. Save the connection and enter the connection name.

Common errors and solutions when connecting to databases: Username or password (Error 1045) Firewall blocks connection (Error 2003) Connection timeout (Error 10060) Unable to use socket connection (Error 1042) SSL connection error (Error 10055) Too many connection attempts result in the host being blocked (Error 1129) Database does not exist (Error 1049) No permission to connect to database (Error 1000)

To connect to a local MySQL database using Navicat: Create a connection and set the connection name, host, port, username, and password. Test the connection to make sure the parameters are correct. Save the connection. Select a new connection from the connection list. Double-click the database you want to connect to.

Steps to perform SQL in Navicat: Connect to the database. Create a SQL Editor window. Write SQL queries or scripts. Click the Run button to execute a query or script. View the results (if the query is executed).
