Lite.php
4.9 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
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
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\cache\driver;
use think\cache\Driver;
/**
* 文件类型缓存类
* @author liu21st <liu21st@gmail.com>
*/
class Lite extends Driver
{
protected $options = [
'prefix' => '',
'path' => '',
'expire' => 0, // 等于 10*365*24*3600（10年）
];
/**
* 架构函数
* @access public
*
* @param array $options
*/
public function __construct($options = [])
{
if (!empty($options)) {
$this->options = array_merge($this->options, $options);
}
if (substr($this->options['path'], -1) != DS) {
$this->options['path'] .= DS;
}
}
/**
* 取得变量的存储文件名
* @access protected
* @param string $name 缓存变量名
* @return string
*/
protected function getCacheKey($name)
{
return $this->options['path'] . $this->options['prefix'] . md5($name) . '.php';
}
/**
* 判断缓存是否存在
* @access public
* @param string $name 缓存变量名
* @return mixed
*/
public function has($name)
{
return $this->get($name) ? true : false;
}
/**
* 读取缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $default 默认值
* @return mixed
*/
public function get($name, $default = false)
{
$filename = $this->getCacheKey($name);
if (is_file($filename)) {
// 判断是否过期
$mtime = filemtime($filename);
if ($mtime < $_SERVER['REQUEST_TIME']) {
// 清除已经过期的文件
unlink($filename);
return $default;
}
return include $filename;
} else {
return $default;
}
}
/**
* 写入缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $value 存储数据
* @param int $expire 有效时间 0为永久
* @return bool
*/
public function set($name, $value, $expire = null)
{
if (is_null($expire)) {
$expire = $this->options['expire'];
}
// 模拟永久
if (0 === $expire) {
$expire = 10 * 365 * 24 * 3600;
}
$filename = $this->getCacheKey($name);
if ($this->tag && !is_file($filename)) {
$first = true;
}
$ret = file_put_contents($filename, ("<?php return " . var_export($value, true) . ";"));
// 通过设置修改时间实现有效期
if ($ret) {
isset($first) && $this->setTagItem($filename);
touch($filename, $_SERVER['REQUEST_TIME'] + $expire);
}
return $ret;
}
/**
* 自增缓存（针对数值缓存）
* @access public
* @param string $name 缓存变量名
* @param int $step 步长
* @return false|int
*/
public function inc($name, $step = 1)
{
if ($this->has($name)) {
$value = $this->get($name) + $step;
} else {
$value = $step;
}
return $this->set($name, $value, 0) ? $value : false;
}
/**
* 自减缓存（针对数值缓存）
* @access public
* @param string $name 缓存变量名
* @param int $step 步长
* @return false|int
*/
public function dec($name, $step = 1)
{
if ($this->has($name)) {
$value = $this->get($name) - $step;
} else {
$value = $step;
}
return $this->set($name, $value, 0) ? $value : false;
}
/**
* 删除缓存
* @access public
* @param string $name 缓存变量名
* @return boolean
*/
public function rm($name)
{
return unlink($this->getCacheKey($name));
}
/**
* 清除缓存
* @access public
* @param string $tag 标签名
* @return bool
*/
public function clear($tag = null)
{
if ($tag) {
// 指定标签清除
$keys = $this->getTagItem($tag);
foreach ($keys as $key) {
unlink($key);
}
$this->rm('tag_' . md5($tag));
return true;
}
array_map("unlink", glob($this->options['path'] . ($this->options['prefix'] ? $this->options['prefix'] . DS : '') . '*.php'));
}
}