LXXXIV. GNU Readline

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 to be run from a shell.


To use the readline functions, you need to install libreadline and compile PHP with support for readline.


To compile PHP with readline support, you need to configure PHP --with-readline after you've installed 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.

Runtime Configuration

This extension does not define any configuration directives.

Resource types

This extension does not define any resource types.

Predefined constants

This extension does not define any constants.

Table of Contents
readline -- Reads a line
readline_add_history -- Adds a line to the history
readline_clear_history -- Clears the history
readline_completion_function -- Registers a completion function
readline_info -- Gets/sets various internal readline variables
readline_list_history -- Lists the history
readline_read_history -- Reads the history
readline_write_history -- Writes the history