Php/docs/readline.configuration

From Get docs

Runtime Configuration

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

Readline Configure Options
Name Default Changeable Changelog
cli.pager "" PHP_INI_ALL Available since PHP 5.4.0.
cli.prompt "\\b \\> " PHP_INI_ALL Available since PHP 5.4.0.

Here's a short explanation of the configuration directives.

cli.pager string
External tool to display output from command line.
cli.prompt string
Command line prompt.