[VOTE] Dump results of expressions in `php -a`

Hi internals, Voting has started on https://wiki.php.net/rfc/readline_interactive_shell_result_function on 2021-01-19, and ends on 2021-02-02. This RFC proposes to dump the results of non-null expressions using var_dump/var_export() by default in php -a (the interactive shell). Additionally, this adds a new function readline_interactive_shell_result_function to the readline PHP module. This function only affects interactive shells - it can optionally be used to set or clear a closure when extension_loaded('readline') === true, but that closure would only be called in interactive shells (i.e. php -a). (That closure would be called instead of the native implementation with the snippet of code that was evaluated and the expression's result, if a php statement contained a single expression such as 2+2; or $x = [1,2]; (that could be used as the expression of a return statement) - Dumping of expression results can be disabled using an ini setting or at runtime Thanks, - Tyson