mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-20 02:48:56 +00:00
5702a6cdc7
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@338506 c90b9560-bf6c-de11-be94-00142212c4b1
255 lines
7 KiB
XML
255 lines
7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
|
<!-- $Revision$ -->
|
|
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.file-get-contents">
|
|
<refnamediv>
|
|
<refname>file_get_contents</refname>
|
|
<refpurpose>Reads entire file into a string</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsect1 role="description">
|
|
&reftitle.description;
|
|
<methodsynopsis>
|
|
<type>string</type><methodname>file_get_contents</methodname>
|
|
<methodparam><type>string</type><parameter>filename</parameter></methodparam>
|
|
<methodparam choice="opt"><type>bool</type><parameter>use_include_path</parameter><initializer>false</initializer></methodparam>
|
|
<methodparam choice="opt"><type>resource</type><parameter>context</parameter></methodparam>
|
|
<methodparam choice="opt"><type>int</type><parameter>offset</parameter><initializer>0</initializer></methodparam>
|
|
<methodparam choice="opt"><type>int</type><parameter>maxlen</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
This function is similar to <function>file</function>, except that
|
|
<function>file_get_contents</function> returns the file in a
|
|
<type>string</type>, starting at the specified <parameter>offset</parameter>
|
|
up to <parameter>maxlen</parameter> bytes. On failure,
|
|
<function>file_get_contents</function> will return &false;.
|
|
</para>
|
|
<para>
|
|
<function>file_get_contents</function> is the preferred way to read the
|
|
contents of a file into a string. It will use memory mapping techniques if
|
|
supported by your OS to enhance performance.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
If you're opening a URI with special characters, such as spaces, you
|
|
need to encode the URI with <function>urlencode</function>.
|
|
</para>
|
|
</note>
|
|
</refsect1>
|
|
|
|
<refsect1 role="parameters">
|
|
&reftitle.parameters;
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>filename</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Name of the file to read.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>use_include_path</parameter></term>
|
|
<listitem>
|
|
<note>
|
|
<para>
|
|
As of PHP 5 the <constant>FILE_USE_INCLUDE_PATH</constant> constant can be used
|
|
to trigger <link linkend="ini.include-path">include path</link>
|
|
search.
|
|
</para>
|
|
</note>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>context</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
A valid context resource created with
|
|
<function>stream_context_create</function>. If you don't need to use a
|
|
custom context, you can skip this parameter by &null;.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>offset</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
The offset where the reading starts on the original stream.
|
|
</para>
|
|
<para>
|
|
Seeking (<parameter>offset</parameter>) is not supported with remote files.
|
|
Attempting to seek on non-local files may work with small offsets, but this
|
|
is unpredictable because it works on the buffered stream.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>maxlen</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Maximum length of data read. The default is to read until end
|
|
of file is reached. Note that this parameter is applied to the
|
|
stream processed by the filters.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="returnvalues">
|
|
&reftitle.returnvalues;
|
|
<para>
|
|
The function returns the read data &return.falseforfailure;.
|
|
</para>
|
|
&return.falseproblem;
|
|
</refsect1>
|
|
|
|
<refsect1 role="errors">
|
|
&reftitle.errors;
|
|
<para>
|
|
An <constant>E_WARNING</constant> level error is generated if <parameter>filename</parameter> cannot be found, <parameter>maxlength</parameter>
|
|
is less than zero, or if seeking to the specified <parameter>offset</parameter> in the stream fails.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="examples">
|
|
&reftitle.examples;
|
|
<para>
|
|
<example>
|
|
<title>Get and output the source of the homepage of a website</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$homepage = file_get_contents('http://www.example.com/');
|
|
echo $homepage;
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>Searching within the include_path</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
// <= PHP 5
|
|
$file = file_get_contents('./people.txt', true);
|
|
// > PHP 5
|
|
$file = file_get_contents('./people.txt', FILE_USE_INCLUDE_PATH);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>Reading a section of a file</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
// Read 14 characters starting from the 21st character
|
|
$section = file_get_contents('./people.txt', NULL, NULL, 20, 14);
|
|
var_dump($section);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs.similar;
|
|
<screen>
|
|
<![CDATA[
|
|
string(14) "lle Bjori Ro"
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
<example>
|
|
<title>Using stream contexts</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
// Create a stream
|
|
$opts = array(
|
|
'http'=>array(
|
|
'method'=>"GET",
|
|
'header'=>"Accept-language: en\r\n" .
|
|
"Cookie: foo=bar\r\n"
|
|
)
|
|
);
|
|
|
|
$context = stream_context_create($opts);
|
|
|
|
// Open the file using the HTTP headers set above
|
|
$file = file_get_contents('http://www.example.com/', false, $context);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="changelog">
|
|
&reftitle.changelog;
|
|
<para>
|
|
<informaltable>
|
|
<tgroup cols="2">
|
|
<thead>
|
|
<row>
|
|
<entry>&Version;</entry>
|
|
<entry>&Description;</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry>5.1.0</entry>
|
|
<entry>
|
|
Added the <parameter>offset</parameter> and
|
|
<parameter>maxlen</parameter> parameters.
|
|
</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</informaltable>
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="notes">
|
|
&reftitle.notes;
|
|
¬e.bin-safe;
|
|
&tip.fopen-wrapper;
|
|
&warn.ssl-non-standard;
|
|
</refsect1>
|
|
|
|
<refsect1 role="seealso">
|
|
&reftitle.seealso;
|
|
<para>
|
|
<simplelist>
|
|
<member><function>file</function></member>
|
|
<member><function>fgets</function></member>
|
|
<member><function>fread</function></member>
|
|
<member><function>readfile</function></member>
|
|
<member><function>file_put_contents</function></member>
|
|
<member><function>stream_get_contents</function></member>
|
|
<member><function>stream_context_create</function></member>
|
|
<member><link linkend="reserved.variables.httpresponseheader">$http_response_header</link></member>
|
|
</simplelist>
|
|
</para>
|
|
</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
|
|
-->
|