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002104c19b
i.e. they must be present in charlist git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@192595 c90b9560-bf6c-de11-be94-00142212c4b1
108 lines
3.4 KiB
XML
108 lines
3.4 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.8 $ -->
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<!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
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<refentry id="function.addcslashes">
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<refnamediv>
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<refname>addcslashes</refname>
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<refpurpose>Quote string with slashes in a C style</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>string</type><methodname>addcslashes</methodname>
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<methodparam><type>string</type><parameter>str</parameter></methodparam>
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<methodparam><type>string</type><parameter>charlist</parameter></methodparam>
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</methodsynopsis>
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<para>
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Returns a string with backslashes before characters that are
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listed in <parameter>charlist</parameter> parameter. If
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<parameter>charlist</parameter> contains characters
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<literal>\n</literal>, <literal>\r</literal> etc., they are
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converted in C-like style, while other non-alphanumeric characters
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with ASCII codes lower than 32 and higher than 126 converted to
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octal representation.
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</para>
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<para>
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Be careful if you choose to escape characters 0, a, b, f, n, r,
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t and v. They will be converted to \0, \a, \b, \f, \n, \r, \t
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and \v.
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In PHP \0 (NULL), \r (carriage return), \n (newline) and \t (tab)
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are predefined escape sequences, while in C all of these are
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predefined escape sequences.
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</para>
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<para>
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<parameter>charlist</parameter> like "\0..\37", which would
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escape all characters with ASCII code between 0 and 31.
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<example>
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<title><function>addcslashes</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$escaped = addcslashes($not_escaped, "\0..\37!@\177..\377");
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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When you define a sequence of characters in the charlist argument
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make sure that you know what characters come between the
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characters that you set as the start and end of the range.
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo addcslashes('foo[ ]', 'A..z');
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// output: \f\o\o\[ \]
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// All upper and lower-case letters will be escaped
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// ... but so will the [\]^_` and any tabs, line
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// feeds, carriage returns, etc.
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?>
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]]>
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</programlisting>
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</informalexample>
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Also, if the first character in a range has a higher ASCII value
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than the second character in the range, no range will be
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constructed. Only the start, end and period characters will be
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escaped. Use the <function>ord</function> function to find the
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ASCII value for a character.
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo addcslashes("zoo['.']", 'z..A');
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// output: \zoo['\.']
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?>
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]]>
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</programlisting>
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</informalexample>
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</para>
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<para>
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See also <function>stripcslashes</function>,
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<function>stripslashes</function>,
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<function>htmlspecialchars</function>, and
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<function>quotemeta</function>.
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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