1--TEST--
2ob_start(): Check behaviour with various callback return values.
3--FILE--
4<?php
5function return_empty_string($string) {
6	return "";
7}
8
9function return_false($string) {
10	return false;
11}
12
13function return_null($string) {
14	return null;
15}
16
17function return_string($string) {
18	return "I stole your output.";
19}
20
21function return_zero($string) {
22	return 0;
23}
24
25// Use each of the above functions as an output buffering callback:
26$functions = get_defined_functions();
27$callbacks = $functions['user'];
28sort($callbacks);
29foreach ($callbacks as $callback) {
30  echo "--> Use callback '$callback':\n";
31  ob_start($callback);
32  echo 'My output.';
33  ob_end_flush();
34  echo "\n\n";
35}
36
37?>
38==DONE==
39--EXPECTF--
40--> Use callback 'return_empty_string':
41
42
43--> Use callback 'return_false':
44My output.
45
46--> Use callback 'return_null':
47
48
49--> Use callback 'return_string':
50I stole your output.
51
52--> Use callback 'return_zero':
530
54
55==DONE==