Backend Development
PHP Problem
How to solve the problem of garbled characters in php database query
How to solve the problem of garbled characters in php database query
Solution to garbled php database query: First create the database in MySQL Command Line Client; then specify the character set of the database so that mysql can support multiple encoding databases at the same time; finally operate the created database. .
Solution to garbled characters
Recommended: "PHP Tutorial"
To solve the garbled code problem, you must first figure out what encoding your database uses. If not specified, the default is latin1.
The three character sets we use most should be gb2312, gbk, and utf8.
So how do we specify the character set of the database? The following is also an example of gbk
[Create a database in MySQL Command Line Client]
mysql> CREATE TABLE `mysqlcode` (
-> `id` TINYINT( 255 ) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY ,
-> `content` VARCHAR( 255 ) NOT NULL
-> ) TYPE = MYISAM CHARACTER SET gbk COLLATE gbk_chinese_ci;
Query OK, 0 rows affected, 1 warning (0.03 sec)
mysql> desc mysqlcode;
+---------+-----------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+-----------------------+------+-----+---------+----------------+
| id | tinyint(255) unsigned | NO | PRI | | auto_increment |
| content | varchar(255) | NO | | | |
+---------+-----------------------+------+-----+---------+----------------+
2 rows in set (0.02 sec)The following TYPE = MYISAM CHARACTER SET gbk COLLATE gbk_chinese_ci;
is the character of the specified database Set, COLLATE (collation), let mysql support multiple encoding databases at the same time.
Of course we can also modify the character set of the database through the following instructions
alter database da_name default character set 'charset'.
The client sends it in gbk format, and the following configuration can be used:
SET character_set_client='gbk' SET character_set_connection='gbk' SET character_set_results='gbk'
This configuration is equivalent In SET NAMES 'gbk'.
Now operate the database just created
mysql> use test; Database changed mysql> insert into mysqlcode values(null,'php爱好者'); ERROR 1406 (22001): Data too long for column 'content' at row 1
The character set is not specified as gbk, and an error occurred during insertion
mysql> set names 'gbk'; Query OK, 0 rows affected (0.02 sec)
The specified character set is gbk
mysql> insert into mysqlcode values(null,'php爱好者'); Query OK, 1 row affected (0.00 sec)
Insert Success
mysql> select * from mysqlcode; +----+-----------+ | id | content | +----+-----------+ | 1 | php爱好着 | +----+-----------+ 1 row in set (0.00 sec)
When reading without specifying the character set gbk, garbled characters will also appear, as follows
mysql> select * from mysqlcode; +----+---------+ | id | content | +----+---------+ | 1 | php??? | +----+---------+ 1 row in set (0.00 sec)
[Create a database in phpmyadmin and specify the character set]
The table type is based on You need to choose, here choose MyISAM (supports full-text search);
Organize and select gbk_chinese_ci, which is the gbk character set
gbk_bin Simplified Chinese, binary. gbk_chinese_ci Simplified Chinese, case-insensitive.
Insert the database into the database you just created
When you browse again, you find that the code is garbled
Why? It is because the database is gbk character set, and we did not specify it as gbk during operation
Go back to the database homepage
You can see the default latin1_bin for mysql connection proofreading. We change it to gbk_chinese_ci
and insert a piece of data. Look, this is normal
[Solution to php reading database garbled code]
Still taking the database mysqlcode as an example
<?php
$conn = mysql_connect("localhost","root","89973645");
mysql_query("set names 'gbk'");//这就是指定数据库字符集，一般放在连接数据库后面就系了
mysql_select_db("test");
$sql = "select * from mysqlcode";
$result = mysql_query($sql,$conn);
?>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>mysql 字符编码</title>
</head>
<body>
<table width="300" height="32" border="1" align="center" cellpadding="0" cellspacing="0">
<tr>
<td width="71" align="center">id</td>
<td width="229" align="center">内容</td>
</tr>
<?php while($row = mysql_fetch_assoc($result)){
echo "
<tr>
<td align=/"center/">".$row['id']."</td>
<td>".$row['content']."</td>
</tr>";
}?>
</table>
</body>
</html>
<?php mysql_free_result($result);?>If we use mysql_query("set names 'gbk '"); Comment it out, it will be garbled when it is sure
Add that sentence and it will be normal again
One sentence
What encoding does your database use? Set it before operating on the database names 'your encoding';
The above is the detailed content of How to solve the problem of garbled characters in php database query. For more information, please follow other related articles on the PHP Chinese website!
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
1385
52
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
7 PHP Functions I Regret I Didn't Know Before
Nov 13, 2024 am 09:42 AM
If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
