-
Notifications
You must be signed in to change notification settings - Fork 13
Expand file tree
/
Copy pathindex.php
More file actions
137 lines (115 loc) · 1.71 KB
/
index.php
File metadata and controls
137 lines (115 loc) · 1.71 KB
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
<?php
/**
* Design pattern "Singleton" (Creational)
* This is demo code
* See for details: http://maxsite.org/page/php-patterns
*/
/**
* Base
*/
trait SingletonTrait
{
private static $instance;
public static function getInstance()
{
if (empty(self::$instance)) self::$instance = new static();
return self::$instance;
}
private function __construct()
{
}
private function __clone()
{
}
private function __wakeup()
{
}
}
/**
* Class for sample
*/
class Foo
{
/**
* Add SingletonTrait to this class
*/
use SingletonTrait;
/**
* Class's own methods...
*/
private $var = [];
public function addVal($v)
{
$this->var[] = $v;
}
public function getVal()
{
return $this->var;
}
}
/**
* demo
*/
echo '<pre>'; // for print in browser
# $foo = new Foo(); // Error: Call to private Foo::__construct()
/**
* get instance in $foo1
*/
$foo1 = Foo::getInstance();
/**
* add values
*/
$foo1->addVal('first');
$foo1->addVal('second');
/**
* control
*/
print_r($foo1->getVal());
/*
Array
(
[0] => first
[1] => second
)
*/
/**
* new variable $foo2
*/
$foo2 = Foo::getInstance();
print_r($foo2->getVal());
/*
Array
(
[0] => first
[1] => second
)
*/
/**
* add value to $foo
*/
$foo1->addVal('new value');
/**
* control $foo1
*/
print_r($foo1->getVal());
/*
Array
(
[0] => first
[1] => second
[2] => new value
)
*/
/**
* control $foo2
*/
print_r($foo2->getVal());
/*
Array
(
[0] => first
[1] => second
[2] => new value
)
*/
# end of file