1--TEST--
2readline_callback_handler_install(): Basic test
3--SKIPIF--
4<?php if (!extension_loaded("readline") || !function_exists('readline_callback_handler_install')) die("skip");
5if (READLINE_LIB == "libedit") die("skip readline only");
6?>
7--FILE--
8<?php
9
10function foo() {
11    readline_callback_handler_remove();
12}
13
14var_dump(readline_callback_handler_install('testing: ', 'foo'));
15try {
16    var_dump(readline_callback_handler_install('testing: ', 'foobar!'));
17} catch (\TypeError $e) {
18    echo $e->getMessage() . \PHP_EOL;
19}
20
21?>
22--EXPECT--
23testing: bool(true)
24readline_callback_handler_install(): Argument #2 ($callback) must be a valid callback, function "foobar!" not found or invalid function name
25