token_nameCLXVIII. Unicode Functions
简介
Unicode Support.
警告
This extension is still in development and it isn't available to public yet.
需求
» ICU 3.4 or later is required.
安装
First you should download and install ICU:
例2358.install ICU on Unix
./configure --disable-threads --enable-extras --enable-icuio --enable-layout make && make install
Then checkout latest PHP and configure it --with-icu-dir=<dir> option, where <dir> was the dir to where you installed ICU. You don't need to explicitly use this option if you install ICU to a standard location.
运行时配置
这些函数的行为受 php.ini 的影响。
表305.Unicode Configuration Options
| Name | Default | Changeable | Changelog |
|---|---|---|---|
| unicode.fallback_encoding | NULL | PHP_INI_ALL | Available since PHP 6.0.0. |
| unicode.from_error_mode | "2" | PHP_INI_ALL | Available since PHP 6.0.0. |
| unicode.from_error_subst_char | "3f" | PHP_INI_ALL | Available since PHP 6.0.0. |
| unicode.http_input_encoding | NULL | PHP_INI_ALL | Available since PHP 6.0.0. |
| unicode.output_encoding | NULL | PHP_INI_ALL | Available since PHP 6.0.0. |
| unicode.runtime_encoding | NULL | PHP_INI_ALL | Available since PHP 6.0.0. |
| unicode.script_encoding | NULL | PHP_INI_ALL | Available since PHP 6.0.0. |
| unicode.semantics | off | PHP_INI_PERDIR | Available since PHP 6.0.0. |
有关 PHP_INI_* 常量进一步的细节与定义参见附录H, php.ini 配置选项。
以下是配置选项的简要解释。
- unicode.output_encoding string
Default encoding for output.
预定义常量
以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。
表306.
| constant | value | description |
|---|---|---|
| U_INVALID_STOP | 0 | stop at first invalid character |
| U_INVALID_SKIP | 1 | skip invalid characters |
| U_INVALID_SUBSTITUTE | 2 | replace invalid characters |
| U_INVALID_ESCAPE | 3 | escape invalid characters |
目录
- unicode_encode Set encoding of a unicode string
- unicode_semantics Check whether unicode semantics is enabled
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