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><H1
><A
NAME="function.stream-wrapper-register"
></A
>stream_wrapper_register</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN112153"
></A
><P
> (PHP 4 >= 4.3.2, PHP 5)</P
>stream_wrapper_register -- Register a URL wrapper implemented as a PHP class</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN112156"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>stream_wrapper_register</B
> ( string protocol, string classname)<BR
></BR
><P
> <B
CLASS="function"
>stream_wrapper_register()</B
> allows you to implement
your own protocol handlers and streams for use with all the other
filesystem functions (such as <A
HREF="function.fopen.html"
><B
CLASS="function"
>fopen()</B
></A
>,
<A
HREF="function.fread.html"
><B
CLASS="function"
>fread()</B
></A
> etc.).
</P
><P
> To implement a wrapper, you need to define a class with a number of
member functions, as defined below. When someone fopens your stream,
PHP will create an instance of <VAR
CLASS="parameter"
>classname</VAR
> and
then call methods on that instance. You must implement the methods
exactly as described below - doing otherwise will lead to undefined
behaviour.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Notã: </B
>
As of <VAR
CLASS="literal"
>PHP 5.0.0</VAR
> the instance of
<VAR
CLASS="parameter"
>classname</VAR
> will be populated with a
<VAR
CLASS="parameter"
>context</VAR
> property referencing a
<VAR
CLASS="literal"
>Context Resource</VAR
> which may be accessed
with <A
HREF="function.stream-context-get-options.html"
><B
CLASS="function"
>stream_context_get_options()</B
></A
>.
If no context was passed to the stream creation function,
<VAR
CLASS="parameter"
>context</VAR
> will be set to <TT
CLASS="constant"
><B
>NULL</B
></TT
>.
</P
></BLOCKQUOTE
></DIV
><P
> <B
CLASS="function"
>stream_wrapper_register()</B
> will return <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if the
<VAR
CLASS="parameter"
>protocol</VAR
> already has a handler.
</P
>bool <B
CLASS="methodname"
>stream_open</B
> ( string path, string mode, int options, string opened_path)<BR
></BR
><P
> This method is called immediately after your stream object is
created. <VAR
CLASS="parameter"
>path</VAR
> specifies the URL that was
passed to <A
HREF="function.fopen.html"
><B
CLASS="function"
>fopen()</B
></A
> and that this object is
expected to retrieve. You can use <A
HREF="function.parse-url.html"
><B
CLASS="function"
>parse_url()</B
></A
>
to break it apart.
</P
><P
> <VAR
CLASS="parameter"
>mode</VAR
> is the mode used to open the file,
as detailed for <A
HREF="function.fopen.html"
><B
CLASS="function"
>fopen()</B
></A
>. You are responsible
for checking that <VAR
CLASS="parameter"
>mode</VAR
> is valid for the
<VAR
CLASS="parameter"
>path</VAR
> requested.
</P
><P
> <VAR
CLASS="parameter"
>options</VAR
> holds additional flags set
by the streams API. It can hold one or more of the following
values OR'd together.
<DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN112212"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>Flag</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>STREAM_USE_PATH</TD
><TD
>If <VAR
CLASS="parameter"
>path</VAR
> is relative, search
for the resource using the include_path.
</TD
></TR
><TR
><TD
>STREAM_REPORT_ERRORS</TD
><TD
>If this flag is set, you are responsible for raising
errors using <A
HREF="function.trigger-error.html"
><B
CLASS="function"
>trigger_error()</B
></A
> during
opening of the stream. If this flag is not set, you
should not raise any errors.
</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
</P
><P
> If the <VAR
CLASS="parameter"
>path</VAR
> is opened successfully,
and STREAM_USE_PATH is set in <VAR
CLASS="parameter"
>options</VAR
>,
you should set <VAR
CLASS="parameter"
>opened_path</VAR
> to the full
path of the file/resource that was actually opened.
</P
><P
> If the requested resource was opened successfully, you should
return <TT
CLASS="constant"
><B
>TRUE</B
></TT
>, otherwise you should return <TT
CLASS="constant"
><B
>FALSE</B
></TT
>
</P
>void <B
CLASS="methodname"
>stream_close</B
> ( void )<BR
></BR
><P
> This method is called when the stream is closed, using
<A
HREF="function.fclose.html"
><B
CLASS="function"
>fclose()</B
></A
>. You must release any resources
that were locked or allocated by the stream.
</P
>string <B
CLASS="methodname"
>stream_read</B
> ( int count)<BR
></BR
><P
> This method is called in response to <A
HREF="function.fread.html"
><B
CLASS="function"
>fread()</B
></A
>
and <A
HREF="function.fgets.html"
><B
CLASS="function"
>fgets()</B
></A
> calls on the stream. You
must return up-to <VAR
CLASS="parameter"
>count</VAR
> bytes of data
from the current read/write position as a string.
If there are less than <VAR
CLASS="parameter"
>count</VAR
>
bytes available, return as many as are available. If no
more data is available, return either <TT
CLASS="constant"
><B
>FALSE</B
></TT
> or an
empty string.
You must also update the read/write position of the stream
by the number of bytes that were successfully read.
</P
>int <B
CLASS="methodname"
>stream_write</B
> ( string data)<BR
></BR
><P
> This method is called in response to <A
HREF="function.fwrite.html"
><B
CLASS="function"
>fwrite()</B
></A
>
calls on the stream. You should store <VAR
CLASS="parameter"
>data</VAR
>
into the underlying storage used by your stream. If there is not
enough room, try to store as many bytes as possible.
You should return the number of bytes that were successfully
stored in the stream, or 0 if none could be stored.
You must also update the read/write position of the stream
by the number of bytes that were successfully written.
</P
>bool <B
CLASS="methodname"
>stream_eof</B
> ( void )<BR
></BR
><P
> This method is called in response to <A
HREF="function.feof.html"
><B
CLASS="function"
>feof()</B
></A
>
calls on the stream. You should return <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the read/write
position is at the end of the stream and if no more data is available
to be read, or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> otherwise.
</P
>int <B
CLASS="methodname"
>stream_tell</B
> ( void )<BR
></BR
><P
> This method is called in response to <A
HREF="function.ftell.html"
><B
CLASS="function"
>ftell()</B
></A
>
calls on the stream. You should return the current read/write
position of the stream.
</P
>bool <B
CLASS="methodname"
>stream_seek</B
> ( int offset, int whence)<BR
></BR
><P
> This method is called in response to <A
HREF="function.fseek.html"
><B
CLASS="function"
>fseek()</B
></A
>
calls on the stream. You should update the read/write position
of the stream according to <VAR
CLASS="parameter"
>offset</VAR
> and
<VAR
CLASS="parameter"
>whence</VAR
>. See <A
HREF="function.fseek.html"
><B
CLASS="function"
>fseek()</B
></A
>
for more information about these parameters.
Return <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the position was updated, <TT
CLASS="constant"
><B
>FALSE</B
></TT
> otherwise.
</P
>bool <B
CLASS="methodname"
>stream_flush</B
> ( void )<BR
></BR
><P
> This method is called in response to <A
HREF="function.fflush.html"
><B
CLASS="function"
>fflush()</B
></A
>
calls on the stream. If you have cached data in your stream
but not yet stored it into the underlying storage, you should
do so now.
Return <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the cached data was successfully stored (or
if there was no data to store), or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if the data could
not be stored.
</P
>array <B
CLASS="methodname"
>stream_stat</B
> ( void )<BR
></BR
><P
> This method is called in response to <A
HREF="function.fstat.html"
><B
CLASS="function"
>fstat()</B
></A
>
calls on the stream and should return an array containing the same
values as appropriate for the stream.
</P
>bool <B
CLASS="methodname"
>unlink</B
> ( string path)<BR
></BR
><P
> This method is called in response to <A
HREF="function.unlink.html"
><B
CLASS="function"
>unlink()</B
></A
>
calls on URL paths associated with the wrapper and should attempt
to delete the item specified by <VAR
CLASS="parameter"
>path</VAR
>.
It should return <TT
CLASS="constant"
><B
>TRUE</B
></TT
> on success or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.
In order for the appropriate error message to be returned,
do not define this method if your wrapper does not support unlinking.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Notã: </B
>
Userspace wrapper unlink method is not supported prior to
<VAR
CLASS="literal"
>PHP 5.0.0</VAR
>.
</P
></BLOCKQUOTE
></DIV
>bool <B
CLASS="methodname"
>rename</B
> ( string path_from, string path_to)<BR
></BR
><P
> This method is called in response to <A
HREF="function.rename.html"
><B
CLASS="function"
>rename()</B
></A
>
calls on URL paths associated with the wrapper and should attempt
to rename the item specified by <VAR
CLASS="parameter"
>path_from</VAR
>
to the specification given by <VAR
CLASS="parameter"
>path_to</VAR
>.
It should return <TT
CLASS="constant"
><B
>TRUE</B
></TT
> on success or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.
In order for the appropriate error message to be returned,
do not define this method if your wrapper does not support renaming.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Notã: </B
>
Userspace wrapper rename method is not supported prior to
<VAR
CLASS="literal"
>PHP 5.0.0</VAR
>.
</P
></BLOCKQUOTE
></DIV
>bool <B
CLASS="methodname"
>mkdir</B
> ( string path, int mode, int options)<BR
></BR
><P
> This method is called in response to <A
HREF="function.mkdir.html"
><B
CLASS="function"
>mkdir()</B
></A
>
calls on URL paths associated with the wrapper and should attempt
to create the directory specified by <VAR
CLASS="parameter"
>path</VAR
>.
It should return <TT
CLASS="constant"
><B
>TRUE</B
></TT
> on success or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.
In order for the appropriate error message to be returned,
do not define this method if your wrapper does not support
creating directories. Posible values for <VAR
CLASS="parameter"
>options</VAR
>
include <TT
CLASS="constant"
><B
>STREAM_REPORT_ERRORS</B
></TT
> and
<TT
CLASS="constant"
><B
>STREAM_MKDIR_RECURSIVE</B
></TT
>.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Notã: </B
>
Userspace wrapper mkdir method is not supported prior to
<VAR
CLASS="literal"
>PHP 5.0.0</VAR
>.
</P
></BLOCKQUOTE
></DIV
>bool <B
CLASS="methodname"
>rmdir</B
> ( string path, int options)<BR
></BR
><P
> This method is called in response to <A
HREF="function.rmdir.html"
><B
CLASS="function"
>rmdir()</B
></A
>
calls on URL paths associated with the wrapper and should attempt
to remove the directory specified by <VAR
CLASS="parameter"
>path</VAR
>.
It should return <TT
CLASS="constant"
><B
>TRUE</B
></TT
> on success or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.
In order for the appropriate error message to be returned,
do not define this method if your wrapper does not support
removing directories. Possible values for <VAR
CLASS="parameter"
>options</VAR
>
include <TT
CLASS="constant"
><B
>STREAM_REPORT_ERRORS</B
></TT
>.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Notã: </B
>
Userspace wrapper rmdir method is not supported prior to
<VAR
CLASS="literal"
>PHP 5.0.0</VAR
>.
</P
></BLOCKQUOTE
></DIV
>bool <B
CLASS="methodname"
>dir_opendir</B
> ( string path, int options)<BR
></BR
><P
> This method is called immediately when your stream object is created for
examining directory contents with <A
HREF="function.opendir.html"
><B
CLASS="function"
>opendir()</B
></A
>.
<VAR
CLASS="parameter"
>path</VAR
> specifies the URL that was
passed to <A
HREF="function.opendir.html"
><B
CLASS="function"
>opendir()</B
></A
> and that this object is
expected to explore. You can use <A
HREF="function.parse-url.html"
><B
CLASS="function"
>parse_url()</B
></A
>
to break it apart.
</P
>array <B
CLASS="methodname"
>url_stat</B
> ( string path, int flags)<BR
></BR
><P
> This method is called in response to <A
HREF="function.stat.html"
><B
CLASS="function"
>stat()</B
></A
>
calls on the URL paths associated with the wrapper and should
return as many elements in common with the system function as
possible. Unknown or unavailable values should be set to a
rational value (usually <TT
CLASS="constant"
><B
>0</B
></TT
>).
</P
><P
> <VAR
CLASS="parameter"
>flags</VAR
> holds additional flags set
by the streams API. It can hold one or more of the following
values OR'd together.
<DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN112407"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>Flag</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>STREAM_URL_STAT_LINK</TD
><TD
> For resources with the ability to link to other resource
(such as an HTTP Location: forward, or a filesystem
symlink). This flag specified that only information
about the link itself should be returned, not the
resource pointed to by the link. This flag is set in
response to calls to <A
HREF="function.lstat.html"
><B
CLASS="function"
>lstat()</B
></A
>,
<A
HREF="function.is-link.html"
><B
CLASS="function"
>is_link()</B
></A
>, or <A
HREF="function.filetype.html"
><B
CLASS="function"
>filetype()</B
></A
>.
</TD
></TR
><TR
><TD
>STREAM_URL_STAT_QUIET</TD
><TD
>If this flag is set, your wrapper should not raise any
errors. If this flag is not set, you are responsible for
reporting errors using the <A
HREF="function.trigger-error.html"
><B
CLASS="function"
>trigger_error()</B
></A
>
function during stating of the path.
</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
</P
>string <B
CLASS="methodname"
>dir_readdir</B
> ( void )<BR
></BR
><P
> This method is called in response to <A
HREF="function.readdir.html"
><B
CLASS="function"
>readdir()</B
></A
>
and should return a string representing the next filename in the
location opened by <B
CLASS="function"
>dir_opendir()</B
>.
</P
>bool <B
CLASS="methodname"
>dir_rewinddir</B
> ( void )<BR
></BR
><P
> This method is called in response to <A
HREF="function.rewinddir.html"
><B
CLASS="function"
>rewinddir()</B
></A
>
and should reset the output generated by <B
CLASS="function"
>dir_readdir()</B
>.
i.e.: The next call to <B
CLASS="function"
>dir_readdir()</B
> should return
the first entry in the location returned by <B
CLASS="function"
>dir_opendir()</B
>.
</P
>bool <B
CLASS="methodname"
>dir_closedir</B
> ( void )<BR
></BR
><P
> This method is called in response to <A
HREF="function.closedir.html"
><B
CLASS="function"
>closedir()</B
></A
>.
You should release any resources which were locked or allocated during
the opening and use of the directory stream.
</P
><P
> The example below implements a var:// protocol handler that
allows read/write access to a named global variable using
standard filesystem stream functions such as <A
HREF="function.fread.html"
><B
CLASS="function"
>fread()</B
></A
>.
The var:// protocol implemented below, given the URL
"var://foo" will read/write data to/from $GLOBALS["foo"].
<TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN112448"
></A
><P
><B
>Exemplu 1. A Stream for reading/writing global variables</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br /><br /></font><font color="#007700">class </font><font color="#0000BB">VariableStream </font><font color="#007700">{<br /> var </font><font color="#0000BB">$position</font><font color="#007700">;<br /> var </font><font color="#0000BB">$varname</font><font color="#007700">;<br /> <br /> function </font><font color="#0000BB">stream_open</font><font color="#007700">(</font><font color="#0000BB">$path</font><font color="#007700">, </font><font color="#0000BB">$mode</font><font color="#007700">, </font><font color="#0000BB">$options</font><font color="#007700">, &</font><font color="#0000BB">$opened_path</font><font color="#007700">) <br /> {<br /> </font><font color="#0000BB">$url </font><font color="#007700">= </font><font color="#0000BB">parse_url</font><font color="#007700">(</font><font color="#0000BB">$path</font><font color="#007700">);<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname </font><font color="#007700">= </font><font color="#0000BB">$url</font><font color="#007700">[</font><font color="#DD0000">"host"</font><font color="#007700">];<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">;<br /> <br /> return </font><font color="#0000BB">true</font><font color="#007700">;<br /> }<br /><br /> function </font><font color="#0000BB">stream_read</font><font color="#007700">(</font><font color="#0000BB">$count</font><font color="#007700">) <br /> {<br /> </font><font color="#0000BB">$ret </font><font color="#007700">= </font><font color="#0000BB">substr</font><font color="#007700">(</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">], </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position</font><font color="#007700">, </font><font color="#0000BB">$count</font><font color="#007700">);<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">+= </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$ret</font><font color="#007700">);<br /> return </font><font color="#0000BB">$ret</font><font color="#007700">;<br /> }<br /><br /> function </font><font color="#0000BB">stream_write</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">) <br /> {<br /> </font><font color="#0000BB">$left </font><font color="#007700">= </font><font color="#0000BB">substr</font><font color="#007700">(</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">], </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position</font><font color="#007700">);<br /> </font><font color="#0000BB">$right </font><font color="#007700">= </font><font color="#0000BB">substr</font><font color="#007700">(</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">], </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">+ </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">));<br /> </font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">] = </font><font color="#0000BB">$left </font><font color="#007700">. </font><font color="#0000BB">$data </font><font color="#007700">. </font><font color="#0000BB">$right</font><font color="#007700">;<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">+= </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">);<br /> return </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">);<br /> }<br /><br /> function </font><font color="#0000BB">stream_tell</font><font color="#007700">() <br /> {<br /> return </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position</font><font color="#007700">;<br /> }<br /><br /> function </font><font color="#0000BB">stream_eof</font><font color="#007700">() <br /> {<br /> return </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">>= </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">]);<br /> }<br /><br /> function </font><font color="#0000BB">stream_seek</font><font color="#007700">(</font><font color="#0000BB">$offset</font><font color="#007700">, </font><font color="#0000BB">$whence</font><font color="#007700">) <br /> {<br /> switch (</font><font color="#0000BB">$whence</font><font color="#007700">) {<br /> case </font><font color="#0000BB">SEEK_SET</font><font color="#007700">:<br /> if (</font><font color="#0000BB">$offset </font><font color="#007700">< </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">]) && </font><font color="#0000BB">$offset </font><font color="#007700">>= </font><font color="#0000BB">0</font><font color="#007700">) {<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">= </font><font color="#0000BB">$offset</font><font color="#007700">;<br /> return </font><font color="#0000BB">true</font><font color="#007700">;<br /> } else {<br /> return </font><font color="#0000BB">false</font><font color="#007700">;<br /> }<br /> break;<br /> <br /> case </font><font color="#0000BB">SEEK_CUR</font><font color="#007700">:<br /> if (</font><font color="#0000BB">$offset </font><font color="#007700">>= </font><font color="#0000BB">0</font><font color="#007700">) {<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">+= </font><font color="#0000BB">$offset</font><font color="#007700">;<br /> return </font><font color="#0000BB">true</font><font color="#007700">;<br /> } else {<br /> return </font><font color="#0000BB">false</font><font color="#007700">;<br /> }<br /> break;<br /> <br /> case </font><font color="#0000BB">SEEK_END</font><font color="#007700">:<br /> if (</font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">]) + </font><font color="#0000BB">$offset </font><font color="#007700">>= </font><font color="#0000BB">0</font><font color="#007700">) {<br /> </font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">position </font><font color="#007700">= </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$GLOBALS</font><font color="#007700">[</font><font color="#0000BB">$this</font><font color="#007700">-></font><font color="#0000BB">varname</font><font color="#007700">]) + </font><font color="#0000BB">$offset</font><font color="#007700">;<br /> return </font><font color="#0000BB">true</font><font color="#007700">;<br /> } else {<br /> return </font><font color="#0000BB">false</font><font color="#007700">;<br /> }<br /> break;<br /> <br /> default:<br /> return </font><font color="#0000BB">false</font><font color="#007700">;<br /> }<br /> }<br />}<br /><br /></font><font color="#0000BB">stream_wrapper_register</font><font color="#007700">(</font><font color="#DD0000">"var"</font><font color="#007700">, </font><font color="#DD0000">"VariableStream"</font><font color="#007700">)<br /> or die(</font><font color="#DD0000">"Failed to register protocol"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$myvar </font><font color="#007700">= </font><font color="#DD0000">""</font><font color="#007700">;<br /> <br /></font><font color="#0000BB">$fp </font><font color="#007700">= </font><font color="#0000BB">fopen</font><font color="#007700">(</font><font color="#DD0000">"var://myvar"</font><font color="#007700">, </font><font color="#DD0000">"r+"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">"line1\n"</font><font color="#007700">);<br /></font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">"line2\n"</font><font color="#007700">);<br /></font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">"line3\n"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">rewind</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br />while (!</font><font color="#0000BB">feof</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">)) {<br /> echo </font><font color="#0000BB">fgets</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br />}<br /></font><font color="#0000BB">fclose</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">$myvar</font><font color="#007700">);<br /><br /></font><font color="#0000BB">?></font>
</font>
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