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# CXXXVI. GNU Readline

# 简介

The readline functions implement an interface to the GNU Readline library. These are functions that provide editable command lines. An example being the way Bash allows you to use the arrow keys to insert characters or scroll through command history. Because of the interactive nature of this library, it will be of little use for writing Web applications, but may be useful when writing scripts used from a command line.

> 注意: 本扩展模块在 Windows 平台下不可用。

# 需求

To use the readline functions, you need to install libreadline. You can find libreadline on the home page of the GNU Readline project, at http://cnswww.cns.cwru.edu/~chet/readline/rltop.html. It's maintained by Chet Ramey, who's also the author of Bash.

You can also use these functions with the libedit library, a non-GPL replacement for the readline library. The libedit library is BSD licensed and available for download from http://www.thrysoee.dk/editline/.

# 安装

To use these functions you must compile the CGI or CLI version of PHP with readline support. You need to configure PHP `--with-readline[=DIR]`. In order you want to use the libedit readline replacement, configure PHP `--with-libedit[=DIR]`.

# 运行时配置

本扩展模块在 `php.ini` 中未定义任何配置选项。

# 资源类型

本扩展模块未定义任何资源类型。

# 预定义常量

本扩展模块未定义任何常量。

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