php-doc-en/reference/filesystem/functions/feof.xml
2005-09-20 21:38:58 +00:00

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.11 $ -->
<!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.2 -->
<refentry id="function.feof">
<refnamediv>
<refname>feof</refname>
<refpurpose>Tests for end-of-file on a file pointer</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>bool</type><methodname>feof</methodname>
<methodparam><type>resource</type><parameter>handle</parameter></methodparam>
</methodsynopsis>
<para>
Returns &true; if the file pointer is at EOF or an error occurs
(including socket timeout); otherwise returns &false;.
</para>
<warning>
<simpara>
If a connection opened by <function>fsockopen</function> wasn't closed
by the server, <function>feof</function> will wait until a timeout has
been reached to return &true;. The default timeout value is 60 seconds.
You may use <function>stream_set_timeout</function> to change this
value.
</simpara>
</warning>
&fs.validfp.all;
<warning>
<para>
If passed file pointer is not valid you may get an infinite loop, because
EOF 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>
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