Returns a character set object

# mysqli::get_charset

# mysqli_get_charset

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

mysqli::get_charset -- mysqli_get_charset — Returns a character set object

### 说明

面向对象风格

public function mysqli::get_charset(): ?object

过程化风格

function mysqli_get_charset(mysqli `$mysql`): ?object

Returns a character set object providing several properties of the current active character set.

### 参数

`mysql`
  仅以过程化样式：由 mysqli_connect() 或 mysqli_init() 返回的 mysqli 对象。

### 返回值

The function returns a character set object with the following properties:

`charset`

  Character set name

`collation`

  Collation name

`dir`

  Directory the character set description was fetched from or "" for built-in character sets

`min_length`

  Minimum character length in bytes

`max_length`

  Maximum character length in bytes

`number`

  Internal character set number

`state`

  As of PHP 8.2.0, it is always `1`

### 示例

示例 #1 mysqli::get_charset() example

面向对象风格

    <?php
      $db = mysqli_init();
      $db->real_connect("localhost","root","","test");
      $db->set_charset('latin1');
      var_dump($db->get_charset());
    ?>

过程化风格

    <?php
      $db = mysqli_init();
      mysqli_real_connect($db, "localhost","root","","test");
      mysqli_set_charset($db, 'latin1');
      var_dump(mysqli_get_charset($db));
    ?>

以上示例会输出：

    object(stdClass)#2 (7) {
      ["charset"]=>
      string(6) "latin1"
      ["collation"]=>
      string(17) "latin1_swedish_ci"
      ["dir"]=>
      string(0) ""
      ["min_length"]=>
      int(1)
      ["max_length"]=>
      int(1)
      ["number"]=>
      int(8)
      ["state"]=>
      int(1)
    }

### 参见

- mysqli_character_set_name() - 返回当前数据库连接的字符编码
- mysqli_set_charset() - 设置客户端字符集

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