1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
--TEST--
Pass uninitialised variables by reference and by value to test implicit initialisation.
--FILE--
<?php
function v($val) {
$val = "Val changed";
}
function r(&$ref) {
$ref = "Ref changed";
}
function vv($val1, $val2) {
$val1 = "Val1 changed";
$val2 = "Val2 changed";
}
function vr($val, &$ref) {
$val = "Val changed";
$ref = "Ref changed";
}
function rv(&$ref, $val) {
$val = "Val changed";
$ref = "Ref changed";
}
function rr(&$ref1, &$ref2) {
$ref1 = "Ref1 changed";
$ref2 = "Ref2 changed";
}
class C {
function __construct($val, &$ref) {
$val = "Val changed";
$ref = "Ref changed";
}
function v($val) {
$val = "Val changed";
}
function r(&$ref) {
$ref = "Ref changed";
}
function vv($val1, $val2) {
$val1 = "Val1 changed";
$val2 = "Val2 changed";
}
function vr($val, &$ref) {
$val = "Val changed";
$ref = "Ref changed";
}
function rv(&$ref, $val) {
$val = "Val changed";
$ref = "Ref changed";
}
function rr(&$ref1, &$ref2) {
$ref1 = "Ref1 changed";
$ref2 = "Ref2 changed";
}
static function static_v($val) {
$val = "Val changed";
}
static function static_r(&$ref) {
$ref = "Ref changed";
}
static function static_vv($val1, $val2) {
$val1 = "Val1 changed";
$val2 = "Val2 changed";
}
static function static_vr($val, &$ref) {
$val = "Val changed";
$ref = "Ref changed";
}
static function static_rv(&$ref, $val) {
$val = "Val changed";
$ref = "Ref changed";
}
static function static_rr(&$ref1, &$ref2) {
$ref1 = "Ref1 changed";
$ref2 = "Ref2 changed";
}
}
echo "\n ---- Pass by ref / pass by val: functions ----\n";
unset($u1, $u2);
v($u1);
r($u2);
var_dump($u1, $u2);
unset($u1, $u2);
vv($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
vr($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
rv($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
rr($u1, $u2);
var_dump($u1, $u2);
echo "\n\n ---- Pass by ref / pass by val: static method calls ----\n";
unset($u1, $u2);
C::static_v($u1);
C::static_r($u2);
var_dump($u1, $u2);
unset($u1, $u2);
C::static_vv($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
C::static_vr($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
C::static_rv($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
C::static_rr($u1, $u2);
var_dump($u1, $u2);
echo "\n\n ---- Pass by ref / pass by val: instance method calls ----\n";
unset($u1, $u2);
$c = new C($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
$c->v($u1);
$c->r($u2);
var_dump($u1, $u2);
unset($u1, $u2);
$c->vv($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
$c->vr($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
$c->rv($u1, $u2);
var_dump($u1, $u2);
unset($u1, $u2);
$c->rr($u1, $u2);
var_dump($u1, $u2);
?>
--EXPECTF--
---- Pass by ref / pass by val: functions ----
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
NULL
string(11) "Ref changed"
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
NULL
NULL
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
NULL
string(11) "Ref changed"
Warning: Undefined variable $u2 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
string(11) "Ref changed"
NULL
string(12) "Ref1 changed"
string(12) "Ref2 changed"
---- Pass by ref / pass by val: static method calls ----
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
NULL
string(11) "Ref changed"
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
NULL
NULL
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
NULL
string(11) "Ref changed"
Warning: Undefined variable $u2 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
string(11) "Ref changed"
NULL
string(12) "Ref1 changed"
string(12) "Ref2 changed"
---- Pass by ref / pass by val: instance method calls ----
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
NULL
string(11) "Ref changed"
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
NULL
string(11) "Ref changed"
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
NULL
NULL
Warning: Undefined variable $u1 in %s on line %d
Warning: Undefined variable $u1 in %s on line %d
NULL
string(11) "Ref changed"
Warning: Undefined variable $u2 in %s on line %d
Warning: Undefined variable $u2 in %s on line %d
string(11) "Ref changed"
NULL
string(12) "Ref1 changed"
string(12) "Ref2 changed"
|
