MySQL和PHP：带有西里尔字符的UTF-8

Question

I'm trying to insert a Cyrillic value in the MySQL table, but there is a problem with encoding. 我正在尝试在MySQL表中插入Cyrillic值，但编码存在问题。

Php: PHP的：

<?php

$servername = "localhost";
$username = "a";
$password = "b";
$dbname = "c";

$conn = new mysqli($servername, $username, $password, $dbname);

mysql_query("SET NAMES 'utf8';"); 
mysql_query("SET CHARACTER SET 'utf8';"); 
mysql_query("SET SESSION collation_connection = 'utf8_general_ci';"); 

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$sql = "UPDATE  `c`.`mainp` SET  `search` =  'test тест' WHERE  `mainp`.`id` =1;";

if ($conn->query($sql) === TRUE) {   
}
$conn->close();

?>

MySQL: MySQL的：

| id |    search   |            
| 1  |   test Ð°Ð² |

Note: PHP file is utf-8 , database collation utf8_general_ci 注意：PHP文件是utf-8 ，数据库排序规则是utf8_general_ci

Answer 1

You are mixing APIs here, mysql_* and mysqli_* doesn't mix. 你在这里混合API， mysql_*和mysqli_*不混合。 You should stick with mysqli_ (as it seems you are anyway), as mysql_* functions are deprecated, and removed entirely in PHP7. 你应该坚持使用mysqli_ （因为看起来你似乎是这样），因为不推荐使用mysql_*函数，并且完全在PHP7中删除。

Your actual issue is a charset problem somewhere. 你的实际问题是某个地方的字符集问题。 Here's a few pointers which can help you get the right charset for your application. 这里有一些指示可以帮助您为您的应用程序获得正确的字符集。 This covers most of the general problems one can face when developing a PHP/MySQL application. 这涵盖了开发PHP / MySQL应用程序时可能遇到的大多数常见问题。

ALL attributes throughout your application must be set to UTF-8 应用程序中的所有属性必须设置为UTF-8
Save the document as UTF-8 w/o BOM (If you're using Notepad++, it's Format -> Convert to UTF-8 w/o BOM ) 将文档保存为UTF-8（无BOM）（如果您使用的是Notepad ++， Format - > Convert to UTF-8 w/o BOM ）
The header in both PHP and HTML should be set to UTF-8 PHP和HTML中的标题应设置为UTF-8
- HTML (inside <head></head> tags): HTML （在<head></head>标签内）：
```
 <meta charset="UTF-8"> 
```
- PHP (at the top of your file, before any output): PHP （在文件的顶部，在任何输出之前）：
```
 header('Content-Type: text/html; charset=utf-8'); 
```
Upon connecting to the database, set the charset to UTF-8 for your connection-object, like this (directly after connecting) 连接到数据库后，将charset设置为您的connection-object的UTF-8，如下所示（直接连接后）
```
 mysqli_set_charset($conn, "utf8"); /* Procedural approach */ $conn->set_charset("utf8"); /* Object-oriented approach */ 
```
This is for mysqli_* , there are similar ones for mysql_* and PDO (see bottom of this answer). 这是针对mysqli_* ， mysql_*和PDO也有类似的mysql_* （参见本答案的底部）。
Also make sure your database and tables are set to UTF-8, you can do that like this: 还要确保您的数据库和表设置为UTF-8，您可以这样做：
```
 ALTER DATABASE databasename CHARACTER SET utf8 COLLATE utf8_unicode_ci; ALTER TABLE tablename CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci; 
```
(Any data already stored won't be converted to the proper charset, so you'll need to do this with a clean database, or update the data after doing this if there are broken characters). （已存储的任何数据都不会转换为正确的字符集，因此您需要使用干净的数据库执行此操作，或者在执行此操作后更新数据（如果存在损坏的字符））。

If you're using json_encode() , you might need to apply the JSON_UNESCAPED_UNICODE flag, otherwise it will convert special characters to their hexadecimal equivalent. 如果您正在使用json_encode() ，则可能需要应用JSON_UNESCAPED_UNICODE标志，否则它会将特殊字符转换为其十六进制等效项。

Remember that EVERYTHING in your entire pipeline of code needs to be set to UFT-8, otherwise you might experience broken characters in your application. 请记住， 一切都在代码的整个管线需要被设置为UFT-8，否则，你可能在你的应用体验破字。

In addition to this list, there may be functions that has a specific parameter for specifying a charset. 除了此列表之外，可能还有一些函数具有用于指定字符集的特定参数。 The manual will tell you about this (an example is htmlspecialchars() ). 手册会告诉你这个（例子是htmlspecialchars() ）。

There are also special functions for multibyte characters, example: strtolower() won't lower multibyte characters, for that you'll have to use mb_strtolower() , see this live demo . 还有多字节字符的特殊功能，例如： strtolower()不会降低多字节字符，因为您必须使用mb_strtolower() ，请参阅此实时演示 。

Note 1 : Notice that its someplace noted as utf-8 (with a dash), and someplace as utf8 (without it). 注1 ：请注意，它的位置标记为utf-8 （带破折号），某处为utf8 （没有它）。 It's important that you know when to use which, as they usually aren't interchangeable. 重要的是你知道何时使用哪种，因为它们通常是不可互换的。 For example, HTML and PHP wants utf-8 , but MySQL doesn't. 例如，HTML和PHP需要utf-8 ，但MySQL不需要。

Note 2 : In MySQL, "charset" and "collation" is not the same thing, see Difference between Encoding and collation? 注2 ：在MySQL中，“charset”和“collation”不是一回事，请参阅编码和整理之间的区别？ . 。 Both should be set to utf-8 though; 两者都应该设置为utf-8; generally collation should be either utf8_general_ci or utf8_unicode_ci , see UTF-8: General? 通常整理应该是utf8_general_ci或utf8_unicode_ci ，参见UTF-8：General？ Bin? 滨？ Unicode? Unicode的？ . 。

Note 3 : If you're using emojis, MySQL needs to be specified with an utf8mb4 charset instead of the standard utf8 , both in the database and the connection. 注3 ：如果您使用的是utf8mb4 ，则需要在数据库和连接中使用utf8mb4字符集而不是标准utf8指定MySQL。 HTML and PHP will just have UTF-8 . HTML和PHP只有UTF-8 。

Setting UTF-8 with mysql_ and PDO 使用mysql_和PDO设置UTF-8

PDO: This is done in the DSN of your object. PDO：这是在您的对象的DSN中完成的。 Note the charset attribute, 注意charset属性，
```
 $pdo = new PDO("mysql:host=localhost;dbname=database;charset=utf8", "user", "pass"); 
```
mysql_ : This is done very similar to mysqli_* , but it doesn't take the connection-object as the first argument. mysql_ ：这与mysqli_*非常相似，但它不会将connection-object作为第一个参数。
```
 mysql_set_charset('utf8'); 
```

Answer 2

Solution: 解：

mysql_query("SET NAMES 'utf8';"); > $mysqli->set_charset('utf8'); > $mysqli->set_charset('utf8');

MySQL和PHP：带有西里尔字符的UTF-8

问题描述

2 个解决方案

解决方案1
28 已采纳 2015-08-09 00:19:47

解决方案2
2 2015-08-08 23:17:13

MySQL和PHP：带有西里尔字符的UTF-8

问题描述

2 个解决方案

解决方案1 28 已采纳 2015-08-09 00:19:47

解决方案2 2 2015-08-08 23:17:13

解决方案1
28 已采纳 2015-08-09 00:19:47

解决方案2
2 2015-08-08 23:17:13