Source for file class.imgmagick.php

1     <?php
2     /*
3     METAjour version 1.6 - Content Management System
4     Copyright (C) 2003  IPW Systems A/S
5     
6     This program is free software; you can redistribute it and/or
7     modify it under the terms of the GNU General Public License
8     as published by the Free Software Foundation; either version 2
9     of the License, or (at your option) any later version.
10    
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15    
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software
18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19    
20    $Id: class.imgmagick.php,v 1.1.1.1 2004/09/15 15:33:52 Administrator Exp $
21    
22    */
23    class imgmagick {
24    
25        function imgmagick($image, $outfile, $cmds) {
26            $convert_path = 'c:/programmer/imagemagick/convert';
27    
28            if (!file_exists($image)) {
29                die('ERROR');
30            }
31            preg_match_all('/\+*(([a-z]+)(\(([^\)]*)\))?)\+*/',
32                       $cmds,
33                       $matches, PREG_SET_ORDER);
34    
35            // convert query string to an imagemagick command string
36            $commands = '';
37            foreach ($matches as $match) {
38                // $match[2] is the command name
39                // $match[4] the parameter
40        
41                // check input
42                if (!preg_match('/^[a-z]+$/',$match[2])) {
43                    die('ERROR: Invalid command.');
44                }
45                if (!preg_match('/^[a-z0-9\/{}+-<>!@%]+$/',$match[4])) {
46                    die('ERROR: Invalid parameter.');
47                }
48            
49                // replace } with >, { with <
50                // > and < could give problems when using html
51                $match[4] = str_replace('}','>',$match[4]);
52                $match[4] = str_replace('{','<',$match[4]);
53            
54                // check for special, scripted commands
55                switch ($match[2]) {
56            
57                    case 'type':
58                        // convert the image to this file type
59                        if (!preg_match('/^[a-z]+$/',$match[4])) {
60                            die('ERROR: Invalid parameter.');
61                        }
62                        $new_type = $match[4];
63                        break;
64            
65                    default:
66                        // nothing special, just add the command
67                        if ($match[4]=='') {
68                            // no parameter given, eg: flip
69                            $commands .= ' -'.$match[2].'';
70                        } else {
71                            $commands .= ' -'.$match[2].' "'.$match[4].'"';
72                        }
73                }
74            }
75    
76            // create the convert-command
77            $convert = $convert_path.' '.$commands.' "'.$image.'" ';
78            if (file_exists($outfile)) @unlink($outfile);
79            if (isset($new_type)) {
80                // send file type-command to imagemagick
81                $convert .= $new_type.':';
82            }
83            $convert .= '"'.$outfile.'"';
84            echo ($convert);
85            exec($convert);
86        }
87    }
88    ?>