doc-zh/reference/strings/functions/sscanf.xml at master · php/doc-zh · GitHub

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
<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 4225e50bc391ddba99e367c231463da0dc04357d Maintainer: daijie  Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<refentry xml:id="function.sscanf" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>sscanf</refname>
  <refpurpose>根据指定格式解析输入的字符</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>array</type><type>int</type><type>null</type></type><methodname>sscanf</methodname>
   <methodparam><type>string</type><parameter>string</parameter></methodparam>
   <methodparam><type>string</type><parameter>format</parameter></methodparam>
   <methodparam rep="repeat"><type>mixed</type><parameter role="reference">vars</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>sscanf</function> 函数输入类似 <function>printf</function>。<function>sscanf</function>
   读取字符串 <parameter>string</parameter>，然后根据指定格式 <parameter>format</parameter> 解析。
  </para>
  <para>
   指定的格式字符串中的任意空白匹配输入字符串的任意空白。也就是说即使是格式字符串中的一个制表符（<literal>\t</literal>）也能匹配输入字符串中的单个空白字符。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>string</parameter></term>
     <listitem>
      <para>
       将要被解析的 <type>string</type>。
      </para>
     </listitem>
    </varlistentry>
    &strings.scanf.parameter.format;
    <varlistentry>
     <term><parameter>vars</parameter></term>
     <listitem>
      <para>
       可选参数将以引用方式传入，它们的值将被设置为解析值。
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   如果仅传入了两个参数给这个函数，解析后的值作为数组返回。否则，如果传入可选参数，函数将返回赋值数量。可选参数必须通过引用传递。
  </para>
  <para>
   如果 <parameter>format</parameter> 要求的子字符串比 <parameter>string</parameter>
   内可用的子字符串多，则返回 &null;。
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>sscanf</function> 示例</title>
    <programlisting role="php">
<![CDATA[
<?php
// 获取序列号
list($serial) = sscanf("SN/2350001", "SN/%d");
// 和生产日期
$mandate = "January 01 2000";
list($month, $day, $year) = sscanf($mandate, "%s %d %d");
echo "Item $serial was manufactured on: $year-" . substr($month, 0, 3) . "-$day\n";
?>
]]>
    </programlisting>
   </example>
  </para>
  <para>
   如果传递可选参数，函数将返回赋值的数量。
  </para>
  <para>
   <example>
    <title><function>sscanf</function>——使用可选参数</title>
    <programlisting role="php">
<![CDATA[
<?php
// 获取作者信息并生成 DocBook 实体
$auth = "24\tLewis Carroll";
$n = sscanf($auth, "%d\t%s %s", $id, $first, $last);
echo "<author id='$id'>
    <firstname>$first</firstname>
    <surname>$last</surname>
</author>\n";
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>printf</function></member>
    <member><function>sprintf</function></member>
    <member><function>fprintf</function></member>
    <member><function>vprintf</function></member>
    <member><function>vsprintf</function></member>
    <member><function>vfprintf</function></member>
    <member><function>fscanf</function></member>
    <member><function>number_format</function></member>
    <member><function>date</function></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
-->