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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.15 $ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.tempnam">
<refnamediv>
<refname>tempnam</refname>
<refpurpose>Create file with unique file name</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>tempnam</methodname>
<methodparam><type>string</type><parameter>dir</parameter></methodparam>
<methodparam><type>string</type><parameter>prefix</parameter></methodparam>
</methodsynopsis>
<para>
Creates a file with a unique filename, with access permission set to 0600, in the specified directory.
If the directory does not exist, <function>tempnam</function> may
generate a file in the system's temporary directory, and return
the name of that.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>dir</parameter></term>
<listitem>
<para>
The directory where the temporary filename will be created.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>prefix</parameter></term>
<listitem>
<para>
The prefix of the generated temporary filename.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the new temporary filename, or &false; on
failure.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>4.0.6</entry>
<entry>
Prior to PHP 4.0.6, the behaviour of the
<function>tempnam</function> function was system dependent. On
Windows the TMP environment variable will override the
<parameter>dir</parameter> parameter, on Linux the TMPDIR
environment variable has precedence, while SVR4 will always use
your <parameter>dir</parameter> parameter if the directory it
points to exists. Consult your system documentation on the
tempnam(3) function if in doubt.
</entry>
</row>
<row>
<entry>4.0.3</entry>
<entry>
This function's behavior changed in 4.0.3. The temporary file is also
created to avoid a race condition where the file might appear in the
filesystem between the time the string was generated and before
the script gets around to creating the file. Note, that you need
to remove the file in case you need it no more, it is not done
automatically.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>tempnam</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$tmpfname = tempnam("/tmp", "FOO");
$handle = fopen($tmpfname, "w");
fwrite($handle, "writing to tempfile");
fclose($handle);
// do here something
unlink($tmpfname);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<simpara>
If PHP cannot create a file in the specified <parameter>dir</parameter>
parameter, it falls back on the system default.
</simpara>
</note>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>tmpfile</function></member>
<member><function>sys_get_temp_dir</function></member>
<member><function>unlink</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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