# mysqli::character_set_name

# mysqli_character_set_name

(PHP 5, PHP 7, PHP 8)

mysqli::character_set_name -- mysqli_character_set_name — 返回当前数据库连接的字符编码

### 说明

面向对象风格

public mysqli::character_set_name(): string

过程化风格

mysqli_character_set_name(mysqli `$mysql`): string

返回当前数据库连接的字符编码。

### 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

当前连接的字符编码

### 示例

示例 #1 mysqli::character_set_name() 示例

面向对象风格

`<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* Set the default character set */
$mysqli->set_charset('utf8mb4');
/* Print current character set */
$charset = $mysqli->character_set_name();
printf("Current character set is %s\n", $charset);`

过程化风格

`<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = mysqli_connect("localhost", "my_user", "my_password", "world");
/* Set the default character set */
mysqli_set_charset($mysqli, 'utf8mb4');
/* Print current character set */
$charset = mysqli_character_set_name($mysqli);
printf("Current character set is %s\n", $charset);`

以上示例会输出：

    Current character set is utf8mb4

### 参见

- mysqli_set_charset() - 设置客户端字符集
- mysqli_real_escape_string() - 根据当前连接的字符集，对于 SQL 语句中的特殊字符进行转义

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