1--TEST--
2ob_start() chunk_size: confirm buffer is flushed after any output call that causes its length to equal or exceed chunk_size.
3--INI--
4opcache.optimization_level=0
5--FILE--
6<?php
7/*
8 * proto bool ob_start([ string|array user_function [, int chunk_size [, bool erase]]])
9 * Function is implemented in main/output.c
10*/
11// In HEAD, $chunk_size value of 1 should not have any special behaviour (http://marc.info/?l=php-internals&m=123476465621346&w=2).
12function callback($string) {
13	global $callback_invocations;
14	$callback_invocations++;
15	$len = strlen($string);
16	return "f[call:$callback_invocations; len:$len]$string\n";
17}
18
19for ($cs=-1; $cs<10; $cs++) {
20  echo "\n----( chunk_size: $cs, output append size: 1 )----\n";
21  $callback_invocations=0;
22  ob_start('callback', $cs);
23  echo '1'; echo '2'; echo '3'; echo '4'; echo '5'; echo '6'; echo '7'; echo '8';
24  ob_end_flush();
25}
26
27for ($cs=-1; $cs<10; $cs++) {
28  echo "\n----( chunk_size: $cs, output append size: 4 )----\n";
29  $callback_invocations=0;
30  ob_start('callback', $cs);
31  echo '1234'; echo '5678';
32  ob_end_flush();
33}
34
35?>
36--EXPECTF--
37----( chunk_size: -1, output append size: 1 )----
38f[call:1; len:8]12345678
39
40----( chunk_size: 0, output append size: 1 )----
41f[call:1; len:8]12345678
42
43----( chunk_size: 1, output append size: 1 )----
44f[call:1; len:1]1
45f[call:2; len:1]2
46f[call:3; len:1]3
47f[call:4; len:1]4
48f[call:5; len:1]5
49f[call:6; len:1]6
50f[call:7; len:1]7
51f[call:8; len:1]8
52f[call:9; len:0]
53
54----( chunk_size: 2, output append size: 1 )----
55f[call:1; len:2]12
56f[call:2; len:2]34
57f[call:3; len:2]56
58f[call:4; len:2]78
59f[call:5; len:0]
60
61----( chunk_size: 3, output append size: 1 )----
62f[call:1; len:3]123
63f[call:2; len:3]456
64f[call:3; len:2]78
65
66----( chunk_size: 4, output append size: 1 )----
67f[call:1; len:4]1234
68f[call:2; len:4]5678
69f[call:3; len:0]
70
71----( chunk_size: 5, output append size: 1 )----
72f[call:1; len:5]12345
73f[call:2; len:3]678
74
75----( chunk_size: 6, output append size: 1 )----
76f[call:1; len:6]123456
77f[call:2; len:2]78
78
79----( chunk_size: 7, output append size: 1 )----
80f[call:1; len:7]1234567
81f[call:2; len:1]8
82
83----( chunk_size: 8, output append size: 1 )----
84f[call:1; len:8]12345678
85f[call:2; len:0]
86
87----( chunk_size: 9, output append size: 1 )----
88f[call:1; len:8]12345678
89
90----( chunk_size: -1, output append size: 4 )----
91f[call:1; len:8]12345678
92
93----( chunk_size: 0, output append size: 4 )----
94f[call:1; len:8]12345678
95
96----( chunk_size: 1, output append size: 4 )----
97f[call:1; len:4]1234
98f[call:2; len:4]5678
99f[call:3; len:0]
100
101----( chunk_size: 2, output append size: 4 )----
102f[call:1; len:4]1234
103f[call:2; len:4]5678
104f[call:3; len:0]
105
106----( chunk_size: 3, output append size: 4 )----
107f[call:1; len:4]1234
108f[call:2; len:4]5678
109f[call:3; len:0]
110
111----( chunk_size: 4, output append size: 4 )----
112f[call:1; len:4]1234
113f[call:2; len:4]5678
114f[call:3; len:0]
115
116----( chunk_size: 5, output append size: 4 )----
117f[call:1; len:8]12345678
118f[call:2; len:0]
119
120----( chunk_size: 6, output append size: 4 )----
121f[call:1; len:8]12345678
122f[call:2; len:0]
123
124----( chunk_size: 7, output append size: 4 )----
125f[call:1; len:8]12345678
126f[call:2; len:0]
127
128----( chunk_size: 8, output append size: 4 )----
129f[call:1; len:8]12345678
130f[call:2; len:0]
131
132----( chunk_size: 9, output append size: 4 )----
133f[call:1; len:8]12345678
134