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
38----( chunk_size: -1, output append size: 1 )----
39f[call:1; len:8]12345678
40
41----( chunk_size: 0, output append size: 1 )----
42f[call:1; len:8]12345678
43
44----( chunk_size: 1, output append size: 1 )----
45f[call:1; len:1]1
46f[call:2; len:1]2
47f[call:3; len:1]3
48f[call:4; len:1]4
49f[call:5; len:1]5
50f[call:6; len:1]6
51f[call:7; len:1]7
52f[call:8; len:1]8
53f[call:9; len:0]
54
55----( chunk_size: 2, output append size: 1 )----
56f[call:1; len:2]12
57f[call:2; len:2]34
58f[call:3; len:2]56
59f[call:4; len:2]78
60f[call:5; len:0]
61
62----( chunk_size: 3, output append size: 1 )----
63f[call:1; len:3]123
64f[call:2; len:3]456
65f[call:3; len:2]78
66
67----( chunk_size: 4, output append size: 1 )----
68f[call:1; len:4]1234
69f[call:2; len:4]5678
70f[call:3; len:0]
71
72----( chunk_size: 5, output append size: 1 )----
73f[call:1; len:5]12345
74f[call:2; len:3]678
75
76----( chunk_size: 6, output append size: 1 )----
77f[call:1; len:6]123456
78f[call:2; len:2]78
79
80----( chunk_size: 7, output append size: 1 )----
81f[call:1; len:7]1234567
82f[call:2; len:1]8
83
84----( chunk_size: 8, output append size: 1 )----
85f[call:1; len:8]12345678
86f[call:2; len:0]
87
88----( chunk_size: 9, output append size: 1 )----
89f[call:1; len:8]12345678
90
91----( chunk_size: -1, output append size: 4 )----
92f[call:1; len:8]12345678
93
94----( chunk_size: 0, output append size: 4 )----
95f[call:1; len:8]12345678
96
97----( chunk_size: 1, output append size: 4 )----
98f[call:1; len:4]1234
99f[call:2; len:4]5678
100f[call:3; len:0]
101
102----( chunk_size: 2, output append size: 4 )----
103f[call:1; len:4]1234
104f[call:2; len:4]5678
105f[call:3; len:0]
106
107----( chunk_size: 3, output append size: 4 )----
108f[call:1; len:4]1234
109f[call:2; len:4]5678
110f[call:3; len:0]
111
112----( chunk_size: 4, output append size: 4 )----
113f[call:1; len:4]1234
114f[call:2; len:4]5678
115f[call:3; len:0]
116
117----( chunk_size: 5, output append size: 4 )----
118f[call:1; len:8]12345678
119f[call:2; len:0]
120
121----( chunk_size: 6, output append size: 4 )----
122f[call:1; len:8]12345678
123f[call:2; len:0]
124
125----( chunk_size: 7, output append size: 4 )----
126f[call:1; len:8]12345678
127f[call:2; len:0]
128
129----( chunk_size: 8, output append size: 4 )----
130f[call:1; len:8]12345678
131f[call:2; len:0]
132
133----( chunk_size: 9, output append size: 4 )----
134f[call:1; len:8]12345678
135