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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.gzwrite" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>gzwrite</refname>
<refpurpose>Binary-safe gz-file write</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>int</type><type>false</type></type><methodname>gzwrite</methodname>
<methodparam><type>resource</type><parameter>stream</parameter></methodparam>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>length</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
<function>gzwrite</function> writes the contents of
<parameter>data</parameter> to the given gz-file.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>stream</parameter></term>
<listitem>
<para>
The gz-file pointer. It must be valid, and must point to a file
successfully opened by <function>gzopen</function>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
The string to write.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>length</parameter></term>
<listitem>
<para>
The number of uncompressed bytes to write. If supplied, writing will
stop after <parameter>length</parameter> (uncompressed) bytes have been
written or the end of <parameter>data</parameter> is reached,
whichever comes first.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the number of (uncompressed) bytes written to the given gz-file
stream, &return.falseforfailure;.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>length</parameter> is nullable now; previously, the default was
<literal>0</literal>.
</entry>
</row>
<row>
<entry>7.4.0</entry>
<entry>
This functions returns &false; on failure now; previously <literal>0</literal> was returned.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>gzwrite</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$string = 'Some information to compress';
$gz = gzopen('somefile.gz','w9');
gzwrite($gz, $string);
gzclose($gz);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>gzread</function></member>
<member><function>gzopen</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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