PHP 手册
上一页 |  | 下一页

# CLXVIII. 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 1. 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 1. 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。

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 2.

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

上一页 | 起始页 | 下一页
token_name | 上一级 | unicode_encode