-
Notifications
You must be signed in to change notification settings - Fork 105
/
get.xml
171 lines (162 loc) · 4.84 KB
/
get.xml
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
<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 1d8068ecb070fdc360d750e0c1f3f15796e61ec0 Maintainer: mowangjuanzi Status: ready -->
<refentry xml:id="memcached.get" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>Memcached::get</refname>
<refpurpose>检索元素</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis role="Memcached">
<modifier>public</modifier> <type>mixed</type><methodname>Memcached::get</methodname>
<methodparam><type>string</type><parameter>key</parameter></methodparam>
<methodparam choice="opt"><type class="union"><type>callable</type><type>null</type></type><parameter>cache_cb</parameter><initializer>&null;</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>get_flags</parameter><initializer>0</initializer></methodparam>
</methodsynopsis>
<para>
<function>Memcached::get</function> 返回之前存储在 <parameter>key</parameter> 下的元素。如果元素被找到,并且
<parameter>get_flags</parameter> 指定为 <constant>Memcached::GET_EXTENDED</constant>,也会返回该元素的 CAS
记号。关于 CAS 记号的使用,参阅 <methodname>Memcached::cas</methodname>。可以通过 <parameter>cache_cb</parameter>
参数指定 <link linkend="memcached.callbacks">通读缓存回调</link>。
</para>
<para>
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>key</parameter></term>
<listitem>
<para>
要检索的元素的 key。
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>cache_cb</parameter></term>
<listitem>
<para>
通读缓存回掉函数或 &null;。
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>get_flags</parameter></term>
<listitem>
<para>
flag 控制返回结果。当指定为 <constant>Memcached::GET_EXTENDED</constant> 时,该函数还将返回 CAS 记号。
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
返回存储在缓存中的值,否则返回 &false;。
如果 <parameter>get_flags</parameter> 设置为 <constant>Memcached::GET_EXTENDED</constant>,则返回包含值和 CAS
记号的数组,而不仅仅返回值。如果 key 不存在,<methodname>Memcached::getResultCode</methodname> 将返回
<constant>Memcached::RES_NOTFOUND</constant>。
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>PECL memcached 3.0.0</entry>
<entry>
移除 <parameter role="reference">cas_token</parameter> 参数。
相反,添加 <parameter>get_flags</parameter>,当赋予 <constant>Memcached::GET_EXTENDED</constant> 的值时,将确保获取 CAS 记号。
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>Memcached::get</function> 示例</title>
<programlisting role="php">
<![CDATA[
<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
$m->set('foo', 100);
var_dump($m->get('foo'));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
int(100)
]]>
</screen>
</example>
<example>
<title><function>Memcached::get</function> 示例</title>
<programlisting role="php">
<![CDATA[
<?php
$m = new Memcached();
$m->addServer('localhost', 11211);
if (!($ip = $m->get('ip_block'))) {
if ($m->getResultCode() == Memcached::RES_NOTFOUND) {
$ip = array();
$m->set('ip_block', $ip);
} else {
/* log error */
/* ... */
}
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><methodname>Memcached::getByKey</methodname></member>
<member><methodname>Memcached::getMulti</methodname></member>
<member><methodname>Memcached::getDelayed</methodname></member>
</simplelist>
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->