useful recursive PHP functions

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PHP Manual for

LXXXIX. GNU Readline

Introduction

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 meant using PHP from the command line.

Note: This extension is not available on Windows platforms.

Requirements

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 this 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://sourceforge.net/projects/libedit/.

Installation

To use this 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].

Runtime Configuration

This extension has no configuration directives defined in php.ini.

Resource Types

This extension has no resource types defined.

Predefined Constants

This extension has no constants defined.

Table of Contents readline_add_history -- Adds a line to the historyreadline_clear_history -- Clears the historyreadline_completion_function -- Registers a completion functionreadline_info -- Gets/sets various internal readline variablesreadline_list_history -- Lists the historyreadline_read_history -- Reads the historyreadline_write_history -- Writes the historyreadline -- Reads a line