PHP Manual . Prev . Next . PHP 4 >= 4.0.0) readline_info -- Gets/sets various internal readline variables . mixed readline_info ( [string varname [, string newvalue]]) . If called with no parameters, this function returns an array of values for all the setting readline uses. ... If called with one parameter, the value of that setting is returned. If called with two parameters, the setting will be changed to the given value. ... readline_completion_function . ...