php-doc-en/reference/mcrypt/functions/mcrypt-enc-get-iv-size.xml
Christoph Michael Becker 1c08f29ab7 Mcrypt is deprecated as of PHP 7.1.0
The original patch has been provided by Leigh. I made some minor improvements.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@341620 c90b9560-bf6c-de11-be94-00142212c4b1
2017-01-07 15:28:16 +00:00

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1.7 KiB
XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.mcrypt-enc-get-iv-size" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>mcrypt_enc_get_iv_size</refname>
<refpurpose>Returns the size of the IV of the opened algorithm</refpurpose>
</refnamediv>
<refsynopsisdiv>
&warn.deprecated.function-7-1-0;
</refsynopsisdiv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>mcrypt_enc_get_iv_size</methodname>
<methodparam><type>resource</type><parameter>td</parameter></methodparam>
</methodsynopsis>
<para>
This function returns the size of the IV of the algorithm specified by the
encryption descriptor in bytes. An IV is used in cbc, cfb and ofb modes,
and in some algorithms in stream mode.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>td</parameter></term>
<listitem>
<para>
The encryption descriptor.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the size of the IV, or 0 if the IV is ignored by the algorithm.
</para>
</refsect1>
</refentry>
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