freenetis-github/application/helpers/file.php @ 7b3f6354
| 8baed187 | Michal Kliment | <?php defined('SYSPATH') or die('No direct script access.');
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/**
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* File helper class.
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*
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* $Id: file.php 1725 2008-01-17 16:38:59Z PugFish $
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*
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* @package File Helper
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class file {
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/**
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* Split a file into pieces matching a specific size.
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*
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* @param string file to be split
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* @param string directory to output to, defaults to the same directory as the file
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* @param integer size, in MB, for each chunk to be
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* @return integer The number of pieces that were created.
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*/
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public static function split($filename, $output_dir = FALSE, $piece_size = 10)
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{
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// Find output dir
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$output_dir = ($output_dir == FALSE) ? pathinfo(str_replace('\\', '/', realpath($filename)), PATHINFO_DIRNAME) : str_replace('\\', '/', realpath($output_dir));
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$output_dir = rtrim($output_dir, '/').'/';
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// Open files for writing
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$input_file = fopen($filename, 'rb');
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// Change the piece size to bytes
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$piece_size = 1024 * 1024 * (int) $piece_size; // Size in bytes
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// Set up reading variables
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$read = 0; // Number of bytes read
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$piece = 1; // Current piece
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$chunk = 1024 * 8; // Chunk size to read
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// Split the file
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while ( ! feof($input_file))
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{
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// Open a new piece
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$piece_name = $filename.'.'.str_pad($piece, 3, '0', STR_PAD_LEFT);
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$piece_open = @fopen($piece_name, 'wb+') or die('Could not write piece '.$piece_name);
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// Fill the current piece
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while ($read < $piece_size AND $data = fread($input_file, $chunk))
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{
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fwrite($piece_open, $data) or die('Could not write to open piece '.$piece_name);
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$read += $chunk;
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}
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// Close the current piece
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fclose($piece_open);
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// Prepare to open a new piece
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$read = 0;
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$piece++;
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// Make sure that piece is valid
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($piece < 999) or die('Maximum of 999 pieces exceeded, try a larger piece size');
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}
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// Close input file
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fclose($input_file);
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// Returns the number of pieces that were created
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return ($piece - 1);
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}
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/**
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* Join a split file into a whole file.
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*
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* @param string split filename, without .000 extension
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* @param string output filename, if different then an the filename
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* @return integer The number of pieces that were joined.
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*/
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public static function join($filename, $output = FALSE)
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{
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if ($output == FALSE)
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$output = $filename;
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// Set up reading variables
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$piece = 1; // Current piece
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$chunk = 1024 * 8; // Chunk size to read
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// Open output file
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$output_file = @fopen($output, 'wb+') or die('Could not open output file '.$output);
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// Read each piece
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while ($piece_open = @fopen(($piece_name = $filename.'.'.str_pad($piece, 3, '0', STR_PAD_LEFT)), 'rb'))
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{
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// Write the piece into the output file
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while ( ! feof($piece_open))
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{
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fwrite($output_file, fread($piece_open, $chunk));
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}
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// Close the current piece
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fclose($piece_open);
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// Prepare for a new piece
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$piece++;
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// Make sure piece is valid
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($piece < 999) or die('Maximum of 999 pieces exceeded');
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}
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// Close the output file
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fclose($output_file);
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// Return the number of pieces joined
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return ($piece - 1);
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}
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public static function extension($filename)
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{
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$p = explode('.',$filename);
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return strtolower($p[count($p)-1]);
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}
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} // End file
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