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
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.3 $ -->
<!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
<refentry id="function.addslashes">
<refnamediv>
<refname>addslashes</refname>
<refpurpose>Quote string with slashes</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>string</type><methodname>addslashes</methodname>
<methodparam><type>string</type><parameter>str</parameter></methodparam>
</methodsynopsis>
<para>
Returns a string with backslashes before characters that need
to be quoted in database queries etc. These characters are
single quote (<literal>'</literal>), double quote
(<literal>"</literal>), backslash (<literal>\</literal>)
and NUL (the &null; byte).
</para>
<para>
An example use of <function>addslashes</function> is when you're
entering data into a database. For example, to insert the name
<literal>O'reilly</literal> into a database, you will need to escape
it. Most databases do this with a <literal>\</literal> which would
mean <literal>O\'reilly</literal>. This would only be to get the data
into the database, the extra <literal>\</literal> will not be inserted.
Having the PHP directive <link linkend="ini.magic-quotes-sybase">
magic_quotes_sybase</link> set to <literal>on</literal> will mean
<literal>'</literal> is instead escaped with another
<literal>'</literal>.
</para>
<para>
The PHP directive <link linkend="ini.magic-quotes-gpc">
magic_quotes_gpc</link> is <literal>on</literal> by default, and it
essentially runs <function>addslashes</function> on all GET, POST,
and COOKIE data. Do not use <function>addslashes</function> on
strings that have already been escaped with
<link linkend="ini.magic-quotes-gpc">magic_quotes_gpc</link> as you'll
then do double escaping. The function
<function>get_magic_quotes_gpc</function> may come in handy for
checking this.
</para>
<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>
<para>
See also <function>stripslashes</function>,
<function>htmlspecialchars</function>,
<function>quotemeta</function>, and
<function>get_magic_quotes_gpc</function>.
</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:"../../../../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
-->
|
