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2005 Aurelien 1
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
2
/**
3
 * CodeIgniter
4
 *
5
 * An open source application development framework for PHP 4.3.2 or newer
6
 *
7
 * @package		CodeIgniter
8
 * @author		ExpressionEngine Dev Team
9
 * @copyright	Copyright (c) 2008, EllisLab, Inc.
10
 * @license		http://codeigniter.com/user_guide/license.html
11
 * @link		http://codeigniter.com
12
 * @since		Version 1.0
13
 * @filesource
14
 */
15
16
// ------------------------------------------------------------------------
17
18
/**
19
 * File Uploading Class
20
 *
21
 * @package		CodeIgniter
22
 * @subpackage	Libraries
23
 * @category	Uploads
24
 * @author		ExpressionEngine Dev Team
25
 * @link		http://codeigniter.com/user_guide/libraries/file_uploading.html
26
 */
27
class CI_Upload {
28
29
	var $max_size		= 0;
30
	var $max_width		= 0;
31
	var $max_height		= 0;
32
	var $max_filename	= 0;
33
	var $allowed_types	= "";
34
	var $file_temp		= "";
35
	var $file_name		= "";
36
	var $orig_name		= "";
37
	var $file_type		= "";
38
	var $file_size		= "";
39
	var $file_ext		= "";
40
	var $upload_path	= "";
41
	var $overwrite		= FALSE;
42
	var $encrypt_name	= FALSE;
43
	var $is_image		= FALSE;
44
	var $image_width	= '';
45
	var $image_height	= '';
46
	var $image_type		= '';
47
	var $image_size_str	= '';
48
	var $error_msg		= array();
49
	var $mimes			= array();
50
	var $remove_spaces	= TRUE;
51
	var $xss_clean		= FALSE;
52
	var $temp_prefix	= "temp_file_";
53
54
	/**
55
	 * Constructor
56
	 *
57
	 * @access	public
58
	 */
59
	function CI_Upload($props = array())
60
	{
61
		if (count($props) > 0)
62
		{
63
			$this->initialize($props);
64
		}
65
66
		log_message('debug', "Upload Class Initialized");
67
	}
68
69
	// --------------------------------------------------------------------
70
71
	/**
72
	 * Initialize preferences
73
	 *
74
	 * @access	public
75
	 * @param	array
76
	 * @return	void
77
	 */
78
	function initialize($config = array())
79
	{
80
		$defaults = array(
81
							'max_size'			=> 0,
82
							'max_width'			=> 0,
83
							'max_height'		=> 0,
84
							'max_filename'		=> 0,
85
							'allowed_types'		=> "",
86
							'file_temp'			=> "",
87
							'file_name'			=> "",
88
							'orig_name'			=> "",
89
							'file_type'			=> "",
90
							'file_size'			=> "",
91
							'file_ext'			=> "",
92
							'upload_path'		=> "",
93
							'overwrite'			=> FALSE,
94
							'encrypt_name'		=> FALSE,
95
							'is_image'			=> FALSE,
96
							'image_width'		=> '',
97
							'image_height'		=> '',
98
							'image_type'		=> '',
99
							'image_size_str'	=> '',
100
							'error_msg'			=> array(),
101
							'mimes'				=> array(),
102
							'remove_spaces'		=> TRUE,
103
							'xss_clean'			=> FALSE,
104
							'temp_prefix'		=> "temp_file_"
105
						);
106
107
108
		foreach ($defaults as $key => $val)
109
		{
110
			if (isset($config[$key]))
111
			{
112
				$method = 'set_'.$key;
113
				if (method_exists($this, $method))
114
				{
115
					$this->$method($config[$key]);
116
				}
117
				else
118
				{
119
					$this->$key = $config[$key];
120
				}
121
			}
122
			else
123
			{
124
				$this->$key = $val;
125
			}
126
		}
127
	}
128
129
	// --------------------------------------------------------------------
130
131
	/**
132
	 * Perform the file upload
133
	 *
134
	 * @access	public
135
	 * @return	bool
136
	 */
137
	function do_upload($field = 'userfile')
138
	{
139
		// Is $_FILES[$field] set? If not, no reason to continue.
140
		if ( ! isset($_FILES[$field]))
141
		{
142
			$this->set_error('upload_no_file_selected');
143
			return FALSE;
144
		}
145
146
		// Is the upload path valid?
147
		if ( ! $this->validate_upload_path())
148
		{
149
			// errors will already be set by validate_upload_path() so just return FALSE
150
			return FALSE;
151
		}
152
153
		// Was the file able to be uploaded? If not, determine the reason why.
154
		if ( ! is_uploaded_file($_FILES[$field]['tmp_name']))
155
		{
156
			$error = ( ! isset($_FILES[$field]['error'])) ? 4 : $_FILES[$field]['error'];
157
158
			switch($error)
159
			{
160
				case 1:	// UPLOAD_ERR_INI_SIZE
161
					$this->set_error('upload_file_exceeds_limit');
162
					break;
163
				case 2: // UPLOAD_ERR_FORM_SIZE
164
					$this->set_error('upload_file_exceeds_form_limit');
165
					break;
166
				case 3: // UPLOAD_ERR_PARTIAL
167
				   $this->set_error('upload_file_partial');
168
					break;
169
				case 4: // UPLOAD_ERR_NO_FILE
170
				   $this->set_error('upload_no_file_selected');
171
					break;
172
				case 6: // UPLOAD_ERR_NO_TMP_DIR
173
					$this->set_error('upload_no_temp_directory');
174
					break;
175
				case 7: // UPLOAD_ERR_CANT_WRITE
176
					$this->set_error('upload_unable_to_write_file');
177
					break;
178
				case 8: // UPLOAD_ERR_EXTENSION
179
					$this->set_error('upload_stopped_by_extension');
180
					break;
181
				default :   $this->set_error('upload_no_file_selected');
182
					break;
183
			}
184
185
			return FALSE;
186
		}
187
188
		// Set the uploaded data as class variables
189
		$this->file_temp = $_FILES[$field]['tmp_name'];
190
		$this->file_name = $this->_prep_filename($_FILES[$field]['name']);
191
		$this->file_size = $_FILES[$field]['size'];
192
		$this->file_type = preg_replace("/^(.+?);.*$/", "\\1", $_FILES[$field]['type']);
193
		$this->file_type = strtolower($this->file_type);
194
		$this->file_ext	 = $this->get_extension($_FILES[$field]['name']);
195
196
		// Convert the file size to kilobytes
197
		if ($this->file_size > 0)
198
		{
199
			$this->file_size = round($this->file_size/1024, 2);
200
		}
201
202
		// Is the file type allowed to be uploaded?
203
		if ( ! $this->is_allowed_filetype())
204
		{
205
			$this->set_error('upload_invalid_filetype');
206
			return FALSE;
207
		}
208
209
		// Is the file size within the allowed maximum?
210
		if ( ! $this->is_allowed_filesize())
211
		{
212
			$this->set_error('upload_invalid_filesize');
213
			return FALSE;
214
		}
215
216
		// Are the image dimensions within the allowed size?
217
		// Note: This can fail if the server has an open_basdir restriction.
218
		if ( ! $this->is_allowed_dimensions())
219
		{
220
			$this->set_error('upload_invalid_dimensions');
221
			return FALSE;
222
		}
223
224
		// Sanitize the file name for security
225
		$this->file_name = $this->clean_file_name($this->file_name);
226
227
		// Truncate the file name if it's too long
228
		if ($this->max_filename > 0)
229
		{
230
			$this->file_name = $this->limit_filename_length($this->file_name, $this->max_filename);
231
		}
232
233
		// Remove white spaces in the name
234
		if ($this->remove_spaces == TRUE)
235
		{
236
			$this->file_name = preg_replace("/\s+/", "_", $this->file_name);
237
		}
238
239
		/*
240
		 * Validate the file name
241
		 * This function appends an number onto the end of
242
		 * the file if one with the same name already exists.
243
		 * If it returns false there was a problem.
244
		 */
245
		$this->orig_name = $this->file_name;
246
247
		if ($this->overwrite == FALSE)
248
		{
249
			$this->file_name = $this->set_filename($this->upload_path, $this->file_name);
250
251
			if ($this->file_name === FALSE)
252
			{
253
				return FALSE;
254
			}
255
		}
256
257
		/*
258
		 * Move the file to the final destination
259
		 * To deal with different server configurations
260
		 * we'll attempt to use copy() first.  If that fails
261
		 * we'll use move_uploaded_file().  One of the two should
262
		 * reliably work in most environments
263
		 */
264
		if ( ! @copy($this->file_temp, $this->upload_path.$this->file_name))
265
		{
266
			if ( ! @move_uploaded_file($this->file_temp, $this->upload_path.$this->file_name))
267
			{
268
				 $this->set_error('upload_destination_error');
269
				 return FALSE;
270
			}
271
		}
272
273
		/*
274
		 * Run the file through the XSS hacking filter
275
		 * This helps prevent malicious code from being
276
		 * embedded within a file.  Scripts can easily
277
		 * be disguised as images or other file types.
278
		 */
279
		if ($this->xss_clean == TRUE)
280
		{
281
			$this->do_xss_clean();
282
		}
283
284
		/*
285
		 * Set the finalized image dimensions
286
		 * This sets the image width/height (assuming the
287
		 * file was an image).  We use this information
288
		 * in the "data" function.
289
		 */
290
		$this->set_image_properties($this->upload_path.$this->file_name);
291
292
		return TRUE;
293
	}
294
295
	// --------------------------------------------------------------------
296
297
	/**
298
	 * Finalized Data Array
299
	 *
300
	 * Returns an associative array containing all of the information
301
	 * related to the upload, allowing the developer easy access in one array.
302
	 *
303
	 * @access	public
304
	 * @return	array
305
	 */
306
	function data()
307
	{
308
		return array (
309
						'file_name'			=> $this->file_name,
310
						'file_type'			=> $this->file_type,
311
						'file_path'			=> $this->upload_path,
312
						'full_path'			=> $this->upload_path.$this->file_name,
313
						'raw_name'			=> str_replace($this->file_ext, '', $this->file_name),
314
						'orig_name'			=> $this->orig_name,
315
						'file_ext'			=> $this->file_ext,
316
						'file_size'			=> $this->file_size,
317
						'is_image'			=> $this->is_image(),
318
						'image_width'		=> $this->image_width,
319
						'image_height'		=> $this->image_height,
320
						'image_type'		=> $this->image_type,
321
						'image_size_str'	=> $this->image_size_str,
322
					);
323
	}
324
325
	// --------------------------------------------------------------------
326
327
	/**
328
	 * Set Upload Path
329
	 *
330
	 * @access	public
331
	 * @param	string
332
	 * @return	void
333
	 */
334
	function set_upload_path($path)
335
	{
336
		// Make sure it has a trailing slash
337
		$this->upload_path = rtrim($path, '/').'/';
338
	}
339
340
	// --------------------------------------------------------------------
341
342
	/**
343
	 * Set the file name
344
	 *
345
	 * This function takes a filename/path as input and looks for the
346
	 * existence of a file with the same name. If found, it will append a
347
	 * number to the end of the filename to avoid overwriting a pre-existing file.
348
	 *
349
	 * @access	public
350
	 * @param	string
351
	 * @param	string
352
	 * @return	string
353
	 */
354
	function set_filename($path, $filename)
355
	{
356
		if ($this->encrypt_name == TRUE)
357
		{
358
			mt_srand();
359
			$filename = md5(uniqid(mt_rand())).$this->file_ext;
360
		}
361
362
		if ( ! file_exists($path.$filename))
363
		{
364
			return $filename;
365
		}
366
367
		$filename = str_replace($this->file_ext, '', $filename);
368
369
		$new_filename = '';
370
		for ($i = 1; $i < 100; $i++)
371
		{
372
			if ( ! file_exists($path.$filename.$i.$this->file_ext))
373
			{
374
				$new_filename = $filename.$i.$this->file_ext;
375
				break;
376
			}
377
		}
378
379
		if ($new_filename == '')
380
		{
381
			$this->set_error('upload_bad_filename');
382
			return FALSE;
383
		}
384
		else
385
		{
386
			return $new_filename;
387
		}
388
	}
389
390
	// --------------------------------------------------------------------
391
392
	/**
393
	 * Set Maximum File Size
394
	 *
395
	 * @access	public
396
	 * @param	integer
397
	 * @return	void
398
	 */
399
	function set_max_filesize($n)
400
	{
401
		$this->max_size = ((int) $n < 0) ? 0: (int) $n;
402
	}
403
404
	// --------------------------------------------------------------------
405
406
	/**
407
	 * Set Maximum File Name Length
408
	 *
409
	 * @access	public
410
	 * @param	integer
411
	 * @return	void
412
	 */
413
	function set_max_filename($n)
414
	{
415
		$this->max_filename = ((int) $n < 0) ? 0: (int) $n;
416
	}
417
418
	// --------------------------------------------------------------------
419
420
	/**
421
	 * Set Maximum Image Width
422
	 *
423
	 * @access	public
424
	 * @param	integer
425
	 * @return	void
426
	 */
427
	function set_max_width($n)
428
	{
429
		$this->max_width = ((int) $n < 0) ? 0: (int) $n;
430
	}
431
432
	// --------------------------------------------------------------------
433
434
	/**
435
	 * Set Maximum Image Height
436
	 *
437
	 * @access	public
438
	 * @param	integer
439
	 * @return	void
440
	 */
441
	function set_max_height($n)
442
	{
443
		$this->max_height = ((int) $n < 0) ? 0: (int) $n;
444
	}
445
446
	// --------------------------------------------------------------------
447
448
	/**
449
	 * Set Allowed File Types
450
	 *
451
	 * @access	public
452
	 * @param	string
453
	 * @return	void
454
	 */
455
	function set_allowed_types($types)
456
	{
457
		$this->allowed_types = explode('|', $types);
458
	}
459
460
	// --------------------------------------------------------------------
461
462
	/**
463
	 * Set Image Properties
464
	 *
465
	 * Uses GD to determine the width/height/type of image
466
	 *
467
	 * @access	public
468
	 * @param	string
469
	 * @return	void
470
	 */
471
	function set_image_properties($path = '')
472
	{
473
		if ( ! $this->is_image())
474
		{
475
			return;
476
		}
477
478
		if (function_exists('getimagesize'))
479
		{
480
			if (FALSE !== ($D = @getimagesize($path)))
481
			{
482
				$types = array(1 => 'gif', 2 => 'jpeg', 3 => 'png');
483
484
				$this->image_width		= $D['0'];
485
				$this->image_height		= $D['1'];
486
				$this->image_type		= ( ! isset($types[$D['2']])) ? 'unknown' : $types[$D['2']];
487
				$this->image_size_str	= $D['3'];  // string containing height and width
488
			}
489
		}
490
	}
491
492
	// --------------------------------------------------------------------
493
494
	/**
495
	 * Set XSS Clean
496
	 *
497
	 * Enables the XSS flag so that the file that was uploaded
498
	 * will be run through the XSS filter.
499
	 *
500
	 * @access	public
501
	 * @param	bool
502
	 * @return	void
503
	 */
504
	function set_xss_clean($flag = FALSE)
505
	{
506
		$this->xss_clean = ($flag == TRUE) ? TRUE : FALSE;
507
	}
508
509
	// --------------------------------------------------------------------
510
511
	/**
512
	 * Validate the image
513
	 *
514
	 * @access	public
515
	 * @return	bool
516
	 */
517
	function is_image()
518
	{
519
		// IE will sometimes return odd mime-types during upload, so here we just standardize all
520
		// jpegs or pngs to the same file type.
521
522
		$png_mimes  = array('image/x-png');
523
		$jpeg_mimes = array('image/jpg', 'image/jpe', 'image/jpeg', 'image/pjpeg');
524
525
		if (in_array($this->file_type, $png_mimes))
526
		{
527
			$this->file_type = 'image/png';
528
		}
529
530
		if (in_array($this->file_type, $jpeg_mimes))
531
		{
532
			$this->file_type = 'image/jpeg';
533
		}
534
535
		$img_mimes = array(
536
							'image/gif',
537
							'image/jpeg',
538
							'image/png',
539
						   );
540
541
		return (in_array($this->file_type, $img_mimes, TRUE)) ? TRUE : FALSE;
542
	}
543
544
	// --------------------------------------------------------------------
545
546
	/**
547
	 * Verify that the filetype is allowed
548
	 *
549
	 * @access	public
550
	 * @return	bool
551
	 */
552
	function is_allowed_filetype()
553
	{
554
		if (count($this->allowed_types) == 0 OR ! is_array($this->allowed_types))
555
		{
556
			$this->set_error('upload_no_file_types');
557
			return FALSE;
558
		}
559
560
		foreach ($this->allowed_types as $val)
561
		{
562
			$mime = $this->mimes_types(strtolower($val));
563
564
			if (is_array($mime))
565
			{
566
				if (in_array($this->file_type, $mime, TRUE))
567
				{
568
					return TRUE;
569
				}
570
			}
571
			else
572
			{
573
				if ($mime == $this->file_type)
574
				{
575
					return TRUE;
576
				}
577
			}
578
		}
579
580
		return FALSE;
581
	}
582
583
	// --------------------------------------------------------------------
584
585
	/**
586
	 * Verify that the file is within the allowed size
587
	 *
588
	 * @access	public
589
	 * @return	bool
590
	 */
591
	function is_allowed_filesize()
592
	{
593
		if ($this->max_size != 0  AND  $this->file_size > $this->max_size)
594
		{
595
			return FALSE;
596
		}
597
		else
598
		{
599
			return TRUE;
600
		}
601
	}
602
603
	// --------------------------------------------------------------------
604
605
	/**
606
	 * Verify that the image is within the allowed width/height
607
	 *
608
	 * @access	public
609
	 * @return	bool
610
	 */
611
	function is_allowed_dimensions()
612
	{
613
		if ( ! $this->is_image())
614
		{
615
			return TRUE;
616
		}
617
618
		if (function_exists('getimagesize'))
619
		{
620
			$D = @getimagesize($this->file_temp);
621
622
			if ($this->max_width > 0 AND $D['0'] > $this->max_width)
623
			{
624
				return FALSE;
625
			}
626
627
			if ($this->max_height > 0 AND $D['1'] > $this->max_height)
628
			{
629
				return FALSE;
630
			}
631
632
			return TRUE;
633
		}
634
635
		return TRUE;
636
	}
637
638
	// --------------------------------------------------------------------
639
640
	/**
641
	 * Validate Upload Path
642
	 *
643
	 * Verifies that it is a valid upload path with proper permissions.
644
	 *
645
	 *
646
	 * @access	public
647
	 * @return	bool
648
	 */
649
	function validate_upload_path()
650
	{
651
		if ($this->upload_path == '')
652
		{
653
			$this->set_error('upload_no_filepath');
654
			return FALSE;
655
		}
656
657
		if (function_exists('realpath') AND @realpath($this->upload_path) !== FALSE)
658
		{
659
			$this->upload_path = str_replace("\\", "/", realpath($this->upload_path));
660
		}
661
662
		if ( ! @is_dir($this->upload_path))
663
		{
664
			$this->set_error('upload_no_filepath');
665
			return FALSE;
666
		}
667
668
		if ( ! is_really_writable($this->upload_path))
669
		{
670
			$this->set_error('upload_not_writable');
671
			return FALSE;
672
		}
673
674
		$this->upload_path = preg_replace("/(.+?)\/*$/", "\\1/",  $this->upload_path);
675
		return TRUE;
676
	}
677
678
	// --------------------------------------------------------------------
679
680
	/**
681
	 * Extract the file extension
682
	 *
683
	 * @access	public
684
	 * @param	string
685
	 * @return	string
686
	 */
687
	function get_extension($filename)
688
	{
689
		$x = explode('.', $filename);
690
		return '.'.end($x);
691
	}
692
693
	// --------------------------------------------------------------------
694
695
	/**
696
	 * Clean the file name for security
697
	 *
698
	 * @access	public
699
	 * @param	string
700
	 * @return	string
701
	 */
702
	function clean_file_name($filename)
703
	{
704
		$bad = array(
705
						"<!--",
706
						"-->",
707
						"'",
708
						"<",
709
						">",
710
						'"',
711
						'&',
712
						'$',
713
						'=',
714
						';',
715
						'?',
716
						'/',
717
						"%20",
718
						"%22",
719
						"%3c",		// <
720
						"%253c", 	// <
721
						"%3e", 		// >
722
						"%0e", 		// >
723
						"%28", 		// (
724
						"%29", 		// )
725
						"%2528", 	// (
726
						"%26", 		// &
727
						"%24", 		// $
728
						"%3f", 		// ?
729
						"%3b", 		// ;
730
						"%3d"		// =
731
					);
732
733
		$filename = str_replace($bad, '', $filename);
734
735
		return stripslashes($filename);
736
	}
737
738
	// --------------------------------------------------------------------
739
740
	/**
741
	 * Limit the File Name Length
742
	 *
743
	 * @access	public
744
	 * @param	string
745
	 * @return	string
746
	 */
747
	function limit_filename_length($filename, $length)
748
	{
749
		if (strlen($filename) < $length)
750
		{
751
			return $filename;
752
		}
753
754
		$ext = '';
755
		if (strpos($filename, '.') !== FALSE)
756
		{
757
			$parts		= explode('.', $filename);
758
			$ext		= '.'.array_pop($parts);
759
			$filename	= implode('.', $parts);
760
		}
761
762
		return substr($filename, 0, ($length - strlen($ext))).$ext;
763
	}
764
765
	// --------------------------------------------------------------------
766
767
	/**
768
	 * Runs the file through the XSS clean function
769
	 *
770
	 * This prevents people from embedding malicious code in their files.
771
	 * I'm not sure that it won't negatively affect certain files in unexpected ways,
772
	 * but so far I haven't found that it causes trouble.
773
	 *
774
	 * @access	public
775
	 * @return	void
776
	 */
777
	function do_xss_clean()
778
	{
779
		$file = $this->upload_path.$this->file_name;
780
781
		if (filesize($file) == 0)
782
		{
783
			return FALSE;
784
		}
785
786
		if (($data = @file_get_contents($file)) === FALSE)
787
		{
788
			return FALSE;
789
		}
790
791
		if ( ! $fp = @fopen($file, FOPEN_READ_WRITE))
792
		{
793
			return FALSE;
794
		}
795
796
		$CI =& get_instance();
797
		$data = $CI->input->xss_clean($data);
798
799
		flock($fp, LOCK_EX);
800
		fwrite($fp, $data);
801
		flock($fp, LOCK_UN);
802
		fclose($fp);
803
	}
804
805
	// --------------------------------------------------------------------
806
807
	/**
808
	 * Set an error message
809
	 *
810
	 * @access	public
811
	 * @param	string
812
	 * @return	void
813
	 */
814
	function set_error($msg)
815
	{
816
		$CI =& get_instance();
817
		$CI->lang->load('upload');
818
819
		if (is_array($msg))
820
		{
821
			foreach ($msg as $val)
822
			{
823
				$msg = ($CI->lang->line($val) == FALSE) ? $val : $CI->lang->line($val);
824
				$this->error_msg[] = $msg;
825
				log_message('error', $msg);
826
			}
827
		}
828
		else
829
		{
830
			$msg = ($CI->lang->line($msg) == FALSE) ? $msg : $CI->lang->line($msg);
831
			$this->error_msg[] = $msg;
832
			log_message('error', $msg);
833
		}
834
	}
835
836
	// --------------------------------------------------------------------
837
838
	/**
839
	 * Display the error message
840
	 *
841
	 * @access	public
842
	 * @param	string
843
	 * @param	string
844
	 * @return	string
845
	 */
846
	function display_errors($open = '<p>', $close = '</p>')
847
	{
848
		$str = '';
849
		foreach ($this->error_msg as $val)
850
		{
851
			$str .= $open.$val.$close;
852
		}
853
854
		return $str;
855
	}
856
857
	// --------------------------------------------------------------------
858
859
	/**
860
	 * List of Mime Types
861
	 *
862
	 * This is a list of mime types.  We use it to validate
863
	 * the "allowed types" set by the developer
864
	 *
865
	 * @access	public
866
	 * @param	string
867
	 * @return	string
868
	 */
869
	function mimes_types($mime)
870
	{
871
		global $mimes;
872
873
		if (count($this->mimes) == 0)
874
		{
875
			if (@require_once(APPPATH.'config/mimes'.EXT))
876
			{
877
				$this->mimes = $mimes;
878
				unset($mimes);
879
			}
880
		}
881
882
		return ( ! isset($this->mimes[$mime])) ? FALSE : $this->mimes[$mime];
883
	}
884
885
	// --------------------------------------------------------------------
886
887
	/**
888
	 * Prep Filename
889
	 *
890
	 * Prevents possible script execution from Apache's handling of files multiple extensions
891
	 * http://httpd.apache.org/docs/1.3/mod/mod_mime.html#multipleext
892
	 *
893
	 * @access	private
894
	 * @param	string
895
	 * @return	string
896
	 */
897
	function _prep_filename($filename)
898
	{
899
		if (strpos($filename, '.') === FALSE)
900
		{
901
			return $filename;
902
		}
903
904
		$parts		= explode('.', $filename);
905
		$ext		= array_pop($parts);
906
		$filename	= array_shift($parts);
907
908
		foreach ($parts as $part)
909
		{
910
			if ($this->mimes_types(strtolower($part)) === FALSE)
911
			{
912
				$filename .= '.'.$part.'_';
913
			}
914
			else
915
			{
916
				$filename .= '.'.$part;
917
			}
918
		}
919
920
		$filename .= '.'.$ext;
921
922
		return $filename;
923
	}
924
925
	// --------------------------------------------------------------------
926
927
}
928
// END Upload Class
929
930
/* End of file Upload.php */
931
/* Location: ./system/libraries/Upload.php */