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# XLI. FriBiDi Functions

# Introduction

FriBiDi is a free implementation of the Unicode Bidirectional Algorithm.

# Requirements

You must download and install the FriBiDi package.

# Installation

This PECL extension is not bundled with PHP. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: http://pecl.php.net/package/fribidi.

In order to use these functions you must compile PHP with Fribidi support by using the --with-fribidi[=DIR] configure option.

Windows users will enable `php_fribidi.dll` inside of `php.ini` in order to use these functions. You may download this PECL extension DLL from the PHP Downloads page or at http://snaps.php.net/.

# Runtime Configuration

# Resource Types

# 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.

`FRIBIDI_CHARSET_UTF8` (integer)

`FRIBIDI_CHARSET_8859_6` (integer)

`FRIBIDI_CHARSET_8859_8` (integer)

`FRIBIDI_CHARSET_CP1255` (integer)

`FRIBIDI_CHARSET_CP1256` (integer)

`FRIBIDI_CHARSET_ISIRI_3342` (integer)

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