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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.feof" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>feof</refname>
<refpurpose>Tests for end-of-file on a file pointer</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>feof</methodname>
<methodparam><type>resource</type><parameter>stream</parameter></methodparam>
</methodsynopsis>
<para>
Tests for end-of-file on a file pointer.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>stream</parameter></term>
<listitem>
&fs.validfp.all;
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns &true; if the file pointer is at EOF or an error occurs
(including socket timeout); otherwise returns &false;.
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<warning>
<para>
If a connection opened by <function>fsockopen</function> wasn't closed
by the server, <function>feof</function> will hang. To workaround this, see
below example:
<example>
<title>Handling timeouts with <function>feof</function></title>
<programlisting role="php">
<![CDATA[
<?php
function safe_feof($fp, &$start = NULL) {
$start = microtime(true);
return feof($fp);
}
/* Assuming $fp is previously opened by fsockopen() */
$start = NULL;
$timeout = ini_get('default_socket_timeout');
while(!safe_feof($fp, $start) && (microtime(true) - $start) < $timeout)
{
/* Handle */
}
?>
]]>
</programlisting>
</example>
</para>
</warning>
<warning>
<para>
If the passed file pointer is not valid you may get an infinite loop, because
<function>feof</function> fails to return &true;.
<example>
<title><function>feof</function> example with an invalid file pointer</title>
<programlisting role="php">
<![CDATA[
<?php
// if file can not be read or doesn't exist fopen function returns FALSE
$file = @fopen("no_such_file", "r");
// FALSE from fopen will issue warning and result in infinite loop here
while (!feof($file)) {
}
fclose($file);
?>
]]>
</programlisting>
</example>
</para>
</warning>
</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:"~/.phpdoc/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
-->
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