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
|
<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.addslashes" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>addslashes</refname>
<refpurpose>Quote string with slashes</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>addslashes</methodname>
<methodparam><type>string</type><parameter>string</parameter></methodparam>
</methodsynopsis>
<para>
Returns a string with backslashes added before characters that need to be
escaped. These characters are:
<simplelist>
<member>single quote (<literal>'</literal>)</member>
<member>double quote (<literal>"</literal>)</member>
<member>backslash (<literal>\</literal>)</member>
<member>NUL (the NUL byte)</member>
</simplelist>
</para>
<para>
A use case of <function>addslashes</function> is escaping the aforementioned
characters in a string that is to be evaluated by PHP:
<example>
<title>Escaping Characters</title>
<programlisting role="php">
<![CDATA[
<?php
$str = "O'Reilly?";
eval("echo '" . addslashes($str) . "';");
?>
]]>
</programlisting>
</example>
</para>
<para>
The <function>addslashes</function> is sometimes incorrectly used to try to prevent
<link linkend="security.database.sql-injection">SQL Injection</link>. Instead,
database-specific escaping functions and/or prepared statements should be used.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>string</parameter></term>
<listitem>
<para>
The string to be escaped.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the escaped string.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>An <function>addslashes</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$str = "Is your name O'Reilly?";
// Outputs: Is your name O\'Reilly?
echo addslashes($str);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>stripcslashes</function></member>
<member><function>stripslashes</function></member>
<member><function>addcslashes</function></member>
<member><function>htmlspecialchars</function></member>
<member><function>quotemeta</function></member>
<member><function>get_magic_quotes_gpc</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
-->
|
