readfile(1f) [sunos man page]
readfile(1F) FMLI Commands readfile(1F) NAME
readfile, longline - reads file, gets longest line SYNOPSIS
readfile filename longline [filename] DESCRIPTION
The readfile function reads filename and copies it to stdout. No translation of NEWLINE is done. It keeps track of the longest line it reads and if there is a subsequent call to longline, the length of that line, including the NEWLINE character, is returned. The longline function returns the length, including the NEWLINE character, of the longest line in filename. If filename is not specified, it uses the file named in the last call to readfile. EXAMPLES
Example 1: Typical use of readfile and longline Here is a typical use of readfile and longline in a text frame definition file: . . . text="`readfile myfile`" columns=`longline` . . . ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
cat(1), attributes(5) DIAGNOSTICS
If filename does not exist, readfile will return FALSE (that is, the expression will have an error return). longline returns 0 if a readfile has not previously been issued. NOTES
More than one descriptor can call readfile in the same frame definition file. In text frames, if one of those calls is made from the text descriptor, then a subsequent use of longline will always get the longest line of the file read by the readfile associated with the text descriptor, even if it was not the most recent use of readfile. SunOS 5.10 5 Jul 1990 readfile(1F)
Check Out this Related Man Page
READFILE(3) 1 READFILE(3) readfile - Outputs a file SYNOPSIS
int readfile (string $filename, [bool $use_include_path = false], [resource $context]) DESCRIPTION
Reads a file and writes it to the output buffer. PARAMETERS
o $filename - The filename being read. o $use_include_path - You can use the optional second parameter and set it to TRUE, if you want to search for the file in the include_path, too. o $context - A context stream resource. RETURN VALUES
Returns the number of bytes read from the file. If an error occurs, FALSE is returned and unless the function was called as @readfile(3), an error message is printed. EXAMPLES
Example #1 Forcing a download using readfile(3) <?php $file = 'monkey.gif'; if (file_exists($file)) { header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename='.basename($file)); header('Expires: 0'); header('Cache-Control: must-revalidate'); header('Pragma: public'); header('Content-Length: ' . filesize($file)); readfile($file); exit; } ?> The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Open / Save dialogue NOTES
Note readfile(3) will not present any memory issues, even when sending large files, on its own. If you encounter an out of memory error ensure that output buffering is off with ob_get_level(3). Tip A URL can be used as a filename with this function if the fopen wrappers have been enabled. See fopen(3) for more details on how to specify the filename. See the "Supported Protocols and Wrappers" for links to information about what abilities the various wrappers have, notes on their usage, and information on any predefined variables they may provide. Note Context support was added with PHP 5.0.0. For a description of contexts, refer to "Streams". SEE ALSO
fpassthru(3), file(3), fopen(3), include(3), require(3), virtual(3), file_get_contents(3), "Supported Protocols and Wrappers". PHP Documentation Group READFILE(3)