fpassthru
(PHP 3, PHP 4 )
fpassthru -- Output all remaining data on a file pointer
Description
int fpassthru ( resource handle)
Reads to EOF on the given file pointer from the current
position and writes the results to the output buffer.
If an error occurs, fpassthru() returns FALSE. Otherwise,
fpassthru() returns the number of characters read from handle
and passed through to the output.
The file pointer must be valid, and must point to a file
successfully opened by fopen(), popen(), or fsockopen().
You may need to call rewind() to reset the file pointer
to the beginning of the file if you have already written
data to the file. The file is closed when fpassthru() is
done reading it (leaving handle useless).
If you just want to dump the contents of a file to the
output buffer, without first modifying it or seeking to
a particular offset, you may want to use the readfile(),
which saves you the fopen() call.
Note: When using fpassthru() on a binary file on Windows
systems, you should make sure to open the file in binary
mode by appending a b to the mode used in the call to fopen().
You are encouraged to use the b flag when dealing with
binary files, even if your system does not require it, so
that your scripts will be more portable.
Example 1. Using fpassthru() with binary files
<?php
// open the file in a binary mode
$name = ".\public\dev\img\ok.png";
$fp = fopen($name, 'rb');
// send the right headers
header("Content-Type: image/png");
header("Content-Length: " . filesize($name));
// dump the picture and stop the script
fpassthru($fp);
exit;
?>
See also readfile(), fopen(), popen(), and fsockopen()
