xref: /PHP-8.0/ext/standard/tests/array/bug29493.phpt (revision f8d79582) 
1--TEST--
2Bug #29493 (extract(EXTR_REFS) fails if array has multiple referrals)
3--FILE--
4<?php
5function t1()
6{
7    $a = array('foo' => 'aaa');
8    // refcount($a) = 1
9    // refcount($a['foo']) = 1
10    $b = $a;
11    // refcount($a) = 2
12    // refcount($a['foo']) = 1
13    $b['foo'] = 'bbb';
14    // refcount($a) = 1
15    // refcount($a['foo']) = 1
16
17    var_dump($a, $b);
18
19    extract($a, EXTR_REFS);
20
21    $foo = 'noo';
22
23    var_dump($a, $b);
24}
25
26function t2()
27{
28    $a = array('foo' => 'aaa');
29    // refcount($a) = 1
30    // refcount($a['foo']) = 1
31    $b = &$a;
32    // refcount($a) = 2
33    // is_ref($a) = true
34    // refcount($a['foo']) = 1
35    $b['foo'] = 'bbb';
36    // refcount($a) = 2
37    // refcount($a['foo']) = 1
38
39    var_dump($a, $b);
40
41    extract($a, EXTR_REFS);
42
43    $foo = 'noo';
44
45    var_dump($a, $b);
46}
47
48function t3()
49{
50    $a = array('foo' => 'aaa');
51    // refcount($a) = 1
52    // refcount($a['foo']) = 1
53    $b = &$a;
54    // refcount($a) = 2
55    // is_ref($a) = true
56    // refcount($a['foo']) = 1
57    unset($b);
58    // refcount($a) = 1
59    // is_ref($a) = true
60    // refcount($a['foo']) = 1
61
62    var_dump($a);
63
64    extract($a, EXTR_REFS);
65
66    $foo = 'noo';
67
68    var_dump($a);
69}
70
71t1();
72t2();
73t3();
74?>
75--EXPECT--
76array(1) {
77  ["foo"]=>
78  string(3) "aaa"
79}
80array(1) {
81  ["foo"]=>
82  string(3) "bbb"
83}
84array(1) {
85  ["foo"]=>
86  &string(3) "noo"
87}
88array(1) {
89  ["foo"]=>
90  string(3) "bbb"
91}
92array(1) {
93  ["foo"]=>
94  string(3) "bbb"
95}
96array(1) {
97  ["foo"]=>
98  string(3) "bbb"
99}
100array(1) {
101  ["foo"]=>
102  &string(3) "noo"
103}
104array(1) {
105  ["foo"]=>
106  &string(3) "noo"
107}
108array(1) {
109  ["foo"]=>
110  string(3) "aaa"
111}
112array(1) {
113  ["foo"]=>
114  &string(3) "noo"
115}
116