mb_internal_encoding
(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)
mb_internal_encoding — 设置/获取内部字符编码
参数
encoding-
encoding字符编码名称使用于 HTTP 输入字符编码转换、HTTP 输出字符编码转换、mbstring 模块系列函数字符编码转换的默认编码。内部编码与多字节正则表达式的编码完全不同。
返回值
如果设置了 encoding，则成功时返回 true， 或者在失败时返回 false。
在这种情况下，多字节正则表达式的字符编码不会改变。
如果省略了 encoding，则返回当前的字符编码名称。
错误／异常
从 PHP 8.0.0 起，如果 encoding 的值是无效编码，则会抛出 ValueError。在 PHP 8.0.0 之前，会发出 E_WARNING。
更新日志
| 版本 | 说明 |
|---|---|
| 8.0.0 |
现在 encoding 可以为 null。
|
| 8.0.0 |
如果 encoding 是无效编码，现在抛出 ValueError。以前发出的是 E_WARNING。
|
示例
示例 #1 mb_internal_encoding() 示例
<?php
/* 设置内部字符编码为 UTF-8 */
mb_internal_encoding("UTF-8");
/* 显示当前的内部字符编码*/
echo mb_internal_encoding();
?>参见
- mb_http_input() - 检测 HTTP 输入字符编码
- mb_http_output() - 设置/获取 HTTP 输出字符编码
- mb_detect_order() - 设置/获取 字符编码的检测顺序
- mb_regex_encoding() - Set/Get character encoding for multibyte regex
＋添加备注
用户贡献的备注 5 notes
Joachim Kruyswijk ¶
18 years ago
Especially when writing PHP scripts for use on different servers, it is a very good idea to explicitly set the internal encoding somewhere on top of every document served, e.g.
mb_internal_encoding("UTF-8");
This, in combination with mysql-statement "SET NAMES 'utf8'", will save a lot of debugging trouble.
Also, use the multi-byte string functions instead of the ones you may be used to, e.g. mb_strlen() instead of strlen(), etc.
webfav at web dot de ¶
9 years ago
all together
<?php
// ------------------------------------------------------------
header('Content-Type: text/html; charset=UTF-8');
mb_internal_encoding('UTF-8');
mb_http_output('UTF-8');
mb_http_input('UTF-8');
mb_regex_encoding('UTF-8');
// ------------------------------------------------------------
?>
mortoray at ecircle-ag dot com ¶
19 years ago
Be aware that the strings in your source files must match the encoding you specify by mb_internal_encoding. It appears the Parser loads raw bytes from the file and refers to its internal encoding to determine their actual encoding.
To demonstrate, the following outputs as espected when the /source/ file is Latin-1 encoded:
<?php
mb_internal_encoding("iso-8859-1");
mb_http_output( "UTF-8" );
ob_start("mb_output_handler");
echo "???<br/>";
?>???
Now, a typical use of mb_internal_encoding is shown as follows. Make the change to "utf-8" but leave the /source/ file encoding unchanged:
<?php
mb_internal_encoding("UTF-8");
mb_http_output( "UTF-8" );
ob_start("mb_output_handler");
echo "???<br/>";
?>???
The output will just show the <br/> tag and no text.
Save the file as UTF-8 encoding and then the results will be as expected.
mdirks at gulfstreamcoach dot com ¶
17 years ago
In response to mortoray at ecircle-ag dot com:
The characters display fine as long as you set the Encoding to something more "Latin 1" compatible (i.e. US-ACSII, ISO-8859-1, ISO-8859-1, or Windows 1252). PHP.net auto-detects to UTF-8备份地址：http://www.lvesu.com/blog/php/function.mb-internal-encoding.php