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Unicode Functions

Introduction

Unicode Support.

Warning

This extension is still in development and it isn't available to public yet.

Requirements

» ICU 3.4 or later is required.

Installation

First you should download and install ICU:

Example#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.

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

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 "0" PHP_INI_SYSTEM Available since PHP 6.0.0.
For further details and definitions of the PHP_INI_* constants, see the php.ini directives.

Here's a short explanation of the configuration directives.

unicode.output_encoding string

Default encoding for output.

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

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

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