Source for file class.upload.php 0.25
Documentation is available at class.upload.php
Webpage is available at http://www.verot.net/php_class_upload.htm
// +------------------------------------------------------------------------+
// +------------------------------------------------------------------------+
// | Copyright (c) Colin Verot 2003-2007. All rights reserved. |
// | Last modified 17/11/2007 |
// | Email colin@verot.net |
// | Web http://www.verot.net |
// +------------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify |
// | it under the terms of the GNU General Public License version 2 as |
// | published by the Free Software Foundation. |
// | This program is distributed in the hope that it will be useful, |
// | but WITHOUT ANY WARRANTY; without even the implied warranty of |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
// | GNU General Public License for more details. |
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// | along with this program; if not, write to the |
// | Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
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// | Please give credit on sites that use class.upload and submit changes |
// | of the script so other people can use them as well. |
// | This script is free to use, don't abuse. |
// +------------------------------------------------------------------------+
* @author Colin Verot <colin@verot.net>
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* <b>What does it do?</b>
* It manages file uploads for you. In short, it manages the uploaded file,
* and allows you to do whatever you want with the file, especially if it
* is an image, and as many times as you want.
* It is the ideal class to quickly integrate file upload in your site.
* If the file is an image, you can convert, resize, crop it in many ways.
* You can also apply filters, add borders, text, watermarks, etc...
* That's all you need for a gallery script for instance. Supported formats
* are PNG, JPG, GIF and BMP.
* You can also use the class to work on local files, which is especially
* useful to use the image manipulation features.
* The class works with PHP 4 and 5, and its error messages can
* <b>How does it work?</b>
* You instanciate the class with the $_FILES['my_field'] array
* where my_field is the field name from your upload form.
* The class will check if the original file has been uploaded
* to its temporary location (alternatively, you can instanciate
* the class with a local filename).
* You can then set a number of processing variables to act on the file.
* For instance, you can rename the file, and if it is an image,
* convert and resize it in many ways.
* You can also set what will the class do if the file already exists.
* Then you call the function {@link process} to actually perform the actions
* according to the processing parameters you set above.
* It will create new instances of the original file,
* so the original file remains the same between each process.
* The file will be manipulated, and copied to the given location.
* The processing variables will be reseted once it is done.
* You can repeat setting up a new set of processing variables,
* and calling {@link process} again as many times as you want.
* When you have finished, you can call {@link clean} to delete
* the original uploaded file.
* If you don't set any processing parameters and call {@link process}
* just after instanciating the class. The uploaded file will be simply
* copied to the given location without any alteration or checks.
* Don't forget to add <i>enctype="multipart/form-data"</i> in your form
* tag <form> if you want your form to upload the file.
* <b>How to use it?</b><br>
* Create a simple HTML file, with a form such as:
* <form enctype="multipart/form-data" method="post" action="upload.php">
* <input type="file" size="32" name="image_field" value="">
* <input type="submit" name="Submit" value="upload">
* Create a file called upload.php:
* $handle = new upload($_FILES['image_field']);
* if ($handle->uploaded) {
* $handle->file_new_name_body = 'image_resized';
* $handle->image_resize = true;
* $handle->image_x = 100;
* $handle->image_ratio_y = true;
* $handle->process('/home/user/files/');
* if ($handle->processed) {
* echo 'error : ' . $handle->error;
* <b>How to process local files?</b><br>
* Use the class as following, the rest being the same as above:
* $handle = new upload('/home/user/myfile.jpg');
* <b>How to set the language?</b><br>
* Instantiate the class with a second argument being the language code:
* $handle = new upload($_FILES['image_field'], 'fr_FR');
* $handle = new upload('/home/user/myfile.jpg', 'fr_FR');
* <b>How to output the resulting file or picture directly to the browser?</b><br>
* Simply call {@link process}() without an argument (or with null as first argument):
* $handle = new upload($_FILES['image_field']);
* header('Content-type: ' . $handle->file_src_mime);
* echo $handle->Process();
* Or if you want to force the download of the file:
* $handle = new upload($_FILES['image_field']);
* header('Content-type: ' . $handle->file_src_mime);
* header("Content-Disposition: attachment; filename=".rawurlencode($handle->file_src_name).";");
* echo $handle->Process();
* <b>Processing parameters</b> (reseted after each process)
* <li><b>file_new_name_body</b> replaces the name body (default: '')<br>
* <pre>$handle->file_new_name_body = 'new name';</pre></li>
* <li><b>file_name_body_add</b> appends to the name body (default: '')<br>
* <pre>$handle->file_name_body_add = '_uploaded';</pre></li>
* <li><b>file_new_name_ext</b> replaces the file extension (default: '')<br>
* <pre>$handle->file_new_name_ext = 'txt';</pre></li>
* <li><b>file_safe_name</b> formats the filename (spaces changed to _) (default: true)<br>
* <pre>$handle->file_safe_name = true;</pre></li>
* <li><b>file_overwrite</b> sets behaviour if file already exists (default: false)<br>
* <pre>$handle->file_overwrite = true;</pre></li>
* <li><b>file_auto_rename</b> automatically renames file if it already exists (default: true)<br>
* <pre>$handle->file_auto_rename = true;</pre></li>
* <li><b>auto_create_dir</b> automatically creates destination directory if missing (default: true)<br>
* <pre>$handle->auto_create_dir = true;</pre></li>
* <li><b>dir_auto_chmod</b> automatically attempts to chmod the destination directory if not writeable (default: true)<br>
* <pre>$handle->dir_auto_chmod = true;</pre></li>
* <li><b>dir_chmod</b> chmod used when creating directory or if directory not writeable (default: 0777)<br>
* <pre>$handle->dir_chmod = 0777;</pre></li>
* <li><b>file_max_size</b> sets maximum upload size (default: upload_max_filesize from php.ini)<br>
* <pre>$handle->file_max_size = '1024'; // 1KB</pre></li>
* <li><b>mime_check</b> sets if the class check the MIME against the {@link allowed} list (default: true)<br>
* <pre>$handle->mime_check = false;</pre></li>
* <li><b>mime_magic_check</b> sets if the class uses mime_magic (default: false)<br>
* <pre>$handle->mime_magic_check = true;</pre></li>
* <li><b>no_script</b> sets if the class turns scripts into text files (default: true)<br>
* <pre>$handle->no_script = false;</pre></li>
* <li><b>allowed</b> array of allowed mime-types. wildcard accepted, as in image/* (default: check {@link Init})<br>
* <pre>$handle->allowed = array('application/pdf','application/msword', 'image/*');</pre></li>
* <li><b>forbidden</b> array of forbidden mime-types. wildcard accepted, as in image/* (default: check {@link Init})<br>
* <pre>$handle->forbidden = array('application/*');</pre></li>
* <li><b>image_convert</b> if set, image will be converted (possible values : ''|'png'|'jpeg'|'gif'|'bmp'; default: '')<br>
* <pre>$handle->image_convert = 'jpg';</pre></li>
* <li><b>image_background_color</b> if set, will forcibly fill transparent areas with the color, in hexadecimal (default: null)<br>
* <pre>$handle->image_background_color = '#FF00FF';</pre></li>
* <li><b>image_default_color</b> fallback color background color for non alpha-transparent output formats, such as JPEG or BMP, in hexadecimal (default: #FFFFFF)<br>
* <pre>$handle->image_default_color = '#FF00FF';</pre></li>
* <li><b>jpeg_quality</b> sets the compression quality for JPEG images (default: 85)<br>
* <pre>$handle->jpeg_quality = 50;</pre></li>
* <li><b>jpeg_size</b> if set to a size in bytes, will approximate {@link jpeg_quality} so the output image fits within the size (default: null)<br>
* <pre>$handle->jpeg_size = 3072;</pre></li>
* The following eight settings can be used to invalidate an upload if the file is an image (note that <i>open_basedir</i> restrictions prevent the use of these settings)
* <li><b>image_max_width</b> if set to a dimension in pixels, the upload will be invalid if the image width is greater (default: null)<br>
* <pre>$handle->image_max_width = 200;</pre></li>
* <li><b>image_max_height</b> if set to a dimension in pixels, the upload will be invalid if the image height is greater (default: null)<br>
* <pre>$handle->image_max_height = 100;</pre></li>
* <li><b>image_max_pixels</b> if set to a number of pixels, the upload will be invalid if the image number of pixels is greater (default: null)<br>
* <pre>$handle->image_max_pixels = 50000;</pre></li>
* <li><b>image_max_ratio</b> if set to a aspect ratio (width/height), the upload will be invalid if the image apect ratio is greater (default: null)<br>
* <pre>$handle->image_max_ratio = 1.5;</pre></li>
* <li><b>image_min_width</b> if set to a dimension in pixels, the upload will be invalid if the image width is lower (default: null)<br>
* <pre>$handle->image_min_width = 100;</pre></li>
* <li><b>image_min_height</b> if set to a dimension in pixels, the upload will be invalid if the image height is lower (default: null)<br>
* <pre>$handle->image_min_height = 500;</pre></li>
* <li><b>image_min_pixels</b> if set to a number of pixels, the upload will be invalid if the image number of pixels is lower (default: null)<br>
* <pre>$handle->image_min_pixels = 20000;</pre></li>
* <li><b>image_min_ratio</b> if set to a aspect ratio (width/height), the upload will be invalid if the image apect ratio is lower (default: null)<br>
* <pre>$handle->image_min_ratio = 0.5;</pre></li>
* <li><b>image_resize</b> determines is an image will be resized (default: false)<br>
* <pre>$handle->image_resize = true;</pre></li>
* The following variables are used only if {@link image_resize} == true
* <li><b>image_x</b> destination image width (default: 150)<br>
* <pre>$handle->image_x = 100;</pre></li>
* <li><b>image_y</b> destination image height (default: 150)<br>
* <pre>$handle->image_y = 200;</pre></li>
* Use either one of the following
* <li><b>image_ratio</b> if true, resize image conserving the original sizes ratio, using {@link image_x} AND {@link image_y} as max sizes if true (default: false)<br>
* <pre>$handle->image_ratio = true;</pre></li>
* <li><b>image_ratio_crop</b> if true, resize image conserving the original sizes ratio, using {@link image_x} AND {@link image_y} as max sizes, and cropping excedent to fill the space. setting can also be a string, with one or more from 'TBLR', indicating which side of the image will be kept while cropping (default: false)<br>
* <pre>$handle->image_ratio_crop = true;</pre></li>
* <li><b>image_ratio_fill</b> if true, resize image conserving the original sizes ratio, using {@link image_x} AND {@link image_y} as max sizes, fitting the image in the space and coloring the remaining space. setting can also be a string, with one or more from 'TBLR', indicating which side of the space the image will be in (default: false)<br>
* <pre>$handle->image_ratio_fill = true;</pre></li>
* <li><b>image_ratio_no_zoom_in</b> same as {@link image_ratio}, but won't resize if the source image is smaller than {@link image_x} x {@link image_y} (default: false)<br>
* <pre>$handle->image_ratio_no_zoom_in = true;</pre></li>
* <li><b>image_ratio_no_zoom_out</b> same as {@link image_ratio}, but won't resize if the source image is bigger than {@link image_x} x {@link image_y} (default: false)<br>
* <pre>$handle->image_ratio_no_zoom_out = true;</pre></li>
* <li><b>image_ratio_x</b> if true, resize image, calculating {@link image_x} from {@link image_y} and conserving the original sizes ratio (default: false)<br>
* <pre>$handle->image_ratio_x = true;</pre></li>
* <li><b>image_ratio_y</b> if true, resize image, calculating {@link image_y} from {@link image_x} and conserving the original sizes ratio (default: false)<br>
* <pre>$handle->image_ratio_y = true;</pre></li>
* <li><b>image_ratio_pixels</b> if set to a long integer, resize image, calculating {@link image_y} and {@link image_x} to match a the number of pixels (default: false)<br>
* <pre>$handle->image_ratio_pixels = 25000;</pre></li>
* The following image manipulations require GD2+
* <li><b>image_brightness</b> if set, corrects the brightness. value between -127 and 127 (default: null)<br>
* <pre>$handle->image_brightness = 40;</pre></li>
* <li><b>image_contrast</b> if set, corrects the contrast. value between -127 and 127 (default: null)<br>
* <pre>$handle->image_contrast = 50;</pre></li>
* <li><b>image_tint_color</b> if set, will tint the image with a color, value as hexadecimal #FFFFFF (default: null)<br>
* <pre>$handle->image_tint_color = '#FF0000';</pre></li>
* <li><b>image_overlay_color</b> if set, will add a colored overlay, value as hexadecimal #FFFFFF (default: null)<br>
* <pre>$handle->image_overlay_color = '#FF0000';</pre></li>
* <li><b>image_overlay_percent</b> used when {@link image_overlay_color} is set, determines the opacity (default: 50)<br>
* <pre>$handle->image_overlay_percent = 20;</pre></li>
* <li><b>image_negative</b> inverts the colors in the image (default: false)<br>
* <pre>$handle->image_negative = true;</pre></li>
* <li><b>image_greyscale</b> transforms an image into greyscale (default: false)<br>
* <pre>$handle->image_greyscale = true;</pre></li>
* <li><b>image_threshold</b> applies a threshold filter. value between -127 and 127 (default: null)<br>
* <pre>$handle->image_threshold = 20;</pre></li>
* <li><b>image_text</b> creates a text label on the image, value is a string, with eventual replacement tokens (default: null)<br>
* <pre>$handle->image_text = 'test';</pre></li>
* <li><b>image_text_direction</b> text label direction, either 'h' horizontal or 'v' vertical (default: 'h')<br>
* <pre>$handle->image_text_direction = 'v';</pre></li>
* <li><b>image_text_color</b> text color for the text label, in hexadecimal (default: #FFFFFF)<br>
* <pre>$handle->image_text_color = '#FF0000';</pre></li>
* <li><b>image_text_percent</b> text opacity on the text label, integer between 0 and 100 (default: 100)<br>
* <pre>$handle->image_text_percent = 50;</pre></li>
* <li><b>image_text_background</b> text label background color, in hexadecimal (default: null)<br>
* <pre>$handle->image_text_background = '#FFFFFF';</pre></li>
* <li><b>image_text_background_percent</b> text label background opacity, integer between 0 and 100 (default: 100)<br>
* <pre>$handle->image_text_background_percent = 50;</pre></li>
* <li><b>image_text_font</b> built-in font for the text label, from 1 to 5. 1 is the smallest (default: 5)<br>
* <pre>$handle->image_text_font = 4;</pre></li>
* <li><b>image_text_x</b> absolute text label position, in pixels from the left border. can be negative (default: null)<br>
* <pre>$handle->image_text_x = 5;</pre></li>
* <li><b>image_text_y</b> absolute text label position, in pixels from the top border. can be negative (default: null)<br>
* <pre>$handle->image_text_y = 5;</pre></li>
* <li><b>image_text_position</b> text label position withing the image, a combination of one or two from 'TBLR': top, bottom, left, right (default: null)<br>
* <pre>$handle->image_text_position = 'LR';</pre></li>
* <li><b>image_text_padding</b> text label padding, in pixels. can be overridden by {@link image_text_padding_x} and {@link image_text_padding_y} (default: 0)<br>
* <pre>$handle->image_text_padding = 5;</pre></li>
* <li><b>image_text_padding_x</b> text label horizontal padding (default: null)<br>
* <pre>$handle->image_text_padding_x = 2;</pre></li>
* <li><b>image_text_padding_y</b> text label vertical padding (default: null)<br>
* <pre>$handle->image_text_padding_y = 10;</pre></li>
* <li><b>image_text_alignment</b> text alignment when text has multiple lines, either 'L', 'C' or 'R' (default: 'C')<br>
* <pre>$handle->image_text_alignment = 'R';</pre></li>
* <li><b>image_text_line_spacing</b> space between lines in pixels, when text has multiple lines (default: 0)<br>
* <pre>$handle->image_text_line_spacing = 3;</pre></li>
* <li><b>image_flip</b> flips image, wither 'h' horizontal or 'v' vertical (default: null)<br>
* <pre>$handle->image_flip = 'h';</pre></li>
* <li><b>image_rotate</b> rotates image. possible values are 90, 180 and 270 (default: null)<br>
* <pre>$handle->image_rotate = 90;</pre></li>
* <li><b>image_crop</b> crops image. accepts 4, 2 or 1 values as 'T R B L' or 'TB LR' or 'TBLR'. dimension can be 20, or 20px or 20% (default: null)<br>
* <pre>$handle->image_crop = array(50,40,30,20); OR '-20 20%'...</pre></li>
* <li><b>image_bevel</b> adds a bevel border to the image. value is thickness in pixels (default: null)<br>
* <pre>$handle->image_bevel = 20;</pre></li>
* <li><b>image_bevel_color1</b> top and left bevel color, in hexadecimal (default: #FFFFFF)<br>
* <pre>$handle->image_bevel_color1 = '#FFFFFF';</pre></li>
* <li><b>image_bevel_color2</b> bottom and right bevel color, in hexadecimal (default: #000000)<br>
* <pre>$handle->image_bevel_color2 = '#000000';</pre></li>
* <li><b>image_border</b> adds a unicolor border to the image. accepts 4, 2 or 1 values as 'T R B L' or 'TB LR' or 'TBLR'. dimension can be 20, or 20px or 20% (default: null)<br>
* <pre>$handle->image_border = '3px'; OR '-20 20%' OR array(3,2)...</pre></li>
* <li><b>image_border_color</b> border color, in hexadecimal (default: #FFFFFF)<br>
* <pre>$handle->image_border_color = '#FFFFFF';</pre></li>
* <li><b>image_frame</b> type of frame: 1=flat 2=crossed (default: null)<br>
* <pre>$handle->image_frame = 2;</pre></li>
* <li><b>image_frame_colors</b> list of hex colors, in an array or a space separated string (default: '#FFFFFF #999999 #666666 #000000')<br>
* <pre>$handle->image_frame_colors = array('#999999', '#FF0000', '#666666', '#333333', '#000000');</pre></li>
* <li><b>image_watermark</b> adds a watermark on the image, value is a local filename. accepted files are GIF, JPG, BMP, PNG and PNG alpha (default: null)<br>
* <pre>$handle->image_watermark = 'watermark.png';</pre></li>
* <li><b>image_watermark_x</b> absolute watermark position, in pixels from the left border. can be negative (default: null)<br>
* <pre>$handle->image_watermark_x = 5;</pre></li>
* <li><b>image_watermark_y</b> absolute watermark position, in pixels from the top border. can be negative (default: null)<br>
* <pre>$handle->image_watermark_y = 5;</pre></li>
* <li><b>image_watermark_position</b> watermark position withing the image, a combination of one or two from 'TBLR': top, bottom, left, right (default: null)<br>
* <pre>$handle->image_watermark_position = 'LR';</pre></li>
* <li><b>image_reflection_height</b> if set, a reflection will be added. Format is either in pixels or percentage, such as 40, '40', '40px' or '40%' (default: null)<br>
* <pre>$handle->image_reflection_height = '25%';</pre></li>
* <li><b>image_reflection_space</b> space in pixels between the source image and the reflection, can be negative (default: null)<br>
* <pre>$handle->image_reflection_space = 3;</pre></li>
* <li><b>image_reflection_color</b> reflection background color, in hexadecimal. Now deprecated in favor of {@link image_default_color} (default: #FFFFFF)<br>
* <pre>$handle->image_default_color = '#000000';</pre></li>
* <li><b>image_reflection_opacity</b> opacity level at which the reflection starts, integer between 0 and 100 (default: 60)<br>
* <pre>$handle->image_reflection_opacity = 60;</pre></li>
* <b>Values that can be read before calling {@link process}()</b>
* <li><b>file_src_name</b> Source file name</li>
* <li><b>file_src_name_body</b> Source file name body</li>
* <li><b>file_src_name_ext</b> Source file extension</li>
* <li><b>file_src_pathname</b> Source file complete path and name</li>
* <li><b>file_src_mime</b> Source file mime type</li>
* <li><b>file_src_size</b> Source file size in bytes</li>
* <li><b>file_src_error</b> Upload error code</li>
* <li><b>file_is_image</b> Boolean flag, true if the file is a supported image type</li>
* If the file is a supported image type (and <i>open_basedir</i> restrictions allow it)
* <li><b>image_src_x</b> Source file width in pixels</li>
* <li><b>image_src_y</b> Source file height in pixels</li>
* <li><b>image_src_pixels</b> Source file number of pixels</li>
* <li><b>image_src_type</b> Source file type (png, jpg, gif or bmp)</li>
* <li><b>image_src_bits</b> Source file color depth</li>
* <b>Values that can be read before after {@link process}()</b>
* <li><b>file_dst_path</b> Destination file path</li>
* <li><b>file_dst_name_body</b> Destination file name body</li>
* <li><b>file_dst_name_ext</b> Destination file extension</li>
* <li><b>file_dst_name</b> Destination file name</li>
* <li><b>file_dst_pathname</b> Destination file complete path and name</li>
* If the file is a supported image type
* <li><b>image_dst_x</b> Destination file width</li>
* <li><b>image_dst_y</b> Destination file height</li>
* <li><b>image_convert</b> Destination file format</li>
* Most of the image operations require GD. GD2 is greatly recommended
* The class is compatible with PHP 4.3+, and compatible with PHP5
* <li><b>v 0.25</b> 17/11/2007<br>
* - added translation files and mechanism to instantiate the class with a language different from English<br>
* - added {@link forbidden} to set an array of forbidden MIME types<br>
* - implemented support for simple wildcards in {@link allowed} and {@link forbidden}, such as image/*<br>
* - preset the file extension to the desired conversion format when converting an image<br>
* - added read and write support for BMP images<br>
* - added a flag {@link file_is_image} to determine if the file is a supported image type<br>
* - the class now provides some information about the image, before calling {@link process}(). Available are {@link image_src_x}, {@link image_src_y} and the newly introduced {@link image_src_bits}, {@link image_src_pixels} and {@link image_src_type}. Note that this will not work if <i>open_basedir</i> restrictions are in place<br>
* - improved logging; now provides useful system information<br>
* - added some more pre-processing checks for files that are images: {@link image_max_width}, {@link image_max_height}, {@link image_max_pixels}, {@link image_max_ratio}, {@link image_min_width}, {@link image_min_height}, {@link image_min_pixels} and {@link image_min_ratio}<br>
* - added {@link image_ratio_pixels} to resize an image to a number of pixels, keeping aspect ratio<br>
* - added {@link image_is_palette} and {@link image_is_transparent} and {@link image_transparent_color} for GIF images<br>
* - added {@link image_default_color} to define a fallback color for non alpha-transparent output formats, such as JPEG or BMP<br>
* - changed {@link image_background_color}, which now forces transparent areas to be painted<br>
* - improved reflections and color overlays so that it works with alpha transparent images<br>
* - {@link image_reflection_color} is now deprecated in favour of {@link image_default_color}<br />
* - transparent PNGs are now processed in true color, and fully preserving the alpha channel when doing merges<br>
* - transparent GIFs are now automatically detected. {@link preserve_transparency} is deprecated<br>
* - transparent true color images can be saved as GIF while retaining transparency, semi transparent areas being merged with {@link image_default_color}<br>
* - transparent true color images can be saved as JPG/BMP with the semi transparent areas being merged with {@link image_default_color}<br>
* - fixed conversion of images to true color<br>
* - the class can now output the uploaded files content as the return value of process() if the function is called with an empty or null argumenti, or no argument</li>
* <li><b>v 0.24</b> 25/05/2007<br>
* - added {@link image_background_color}, to set the default background color of an image<br>
* - added possibility of using replacement tokens in text labels<br>
* - changed default JPEG quality to 85<br>
* - fixed a small bug when using greyscale filter and associated filters<br>
* - added {@link image_ratio_fill} in order to fit an image within some dimensions and color the remaining space. Very similar to {@link image_ratio_crop}<br>
* - improved the recursive creation of directories<br>
* - the class now converts palette based images to true colors before doing graphic manipulations</li>
* <li><b>v 0.23</b> 23/12/2006<br>
* - fixed a bug when processing more than once the same uploaded file. If there is an open_basedir restriction, the class now creates a temporary file for the first call to process(). This file will be used for subsequent processes, and will be deleted upon calling clean()</li>
* <li><b>v 0.22</b> 16/12/2006<br>
* - added automatic creation of a temporary file if the upload directory is not within open_basedir<br>
* - fixed a bug which was preventing to work on a local file by overwriting it with its processed copy<br>
* - added MIME types video/x-ms-wmv and image/x-png and fixed PNG support for IE weird MIME types<br>
* - modified {@link image_ratio_crop} so it can accept one or more from string 'TBLR', determining which side of the image is kept while cropping<br>
* - added support for multiple lines in the text, using "\n" as a line break<br>
* - added {@link image_text_line_spacing} which allow to set the space between several lines of text<br>
* - added {@link image_text_alignment} which allow to set the alignment when text has several lines<br>
* - {@link image_text_font} can now be set to the path of a GDF font to load external fonts<br>
* - added {@link image_reflection_height} to create a reflection of the source image, which height is in pixels or percentage<br>
* - added {@link image_reflection_space} to set the space in pixels between the source image and the reflection<br>
* - added {@link image_reflection_color} to set the reflection background color<br>
* - added {@link image_reflection_opacity} to set the initial level of opacity of the reflection</li>
* <li><b>v 0.21</b> 30/09/2006<br>
* - added {@link image_ratio_crop} which resizes within {@link image_x} and {@link image_y}, keeping ratio, but filling the space by cropping excedent of image<br>
* - added {@link mime_check}, which default is true, to set checks against {@link allowed} MIME list<br>
* - if MIME is empty, the class now triggers an error<br>
* - color #000000 is OK for {@link image_text_color}, and related text transparency bug fixed<br>
* - {@link gd_version}() now uses gd_info(), or else phpinfo()<br>
* - fixed path issue when the destination path has no trailing slash on Windows systems <br>
* - removed inline functions to be fully PHP5 compatible </li>
* <li><b>v 0.20</b> 11/08/2006<br>
* - added some more error checking and messages (GD presence, permissions...)<br>
* - fix when uploading files without extension<br>
* - changed values for {@link image_brightness} and {@link image_contrast} to be between -127 and 127<br>
* - added {@link dir_auto_create} to automatically and recursively create destination directory if missing.<br>
* - added {@link dir_auto_chmod} to automatically chmod the destination directory if not writeable.<br>
* - added {@link dir_chmod} to set the default chmod to use.<br>
* - added {@link image_crop} to crop images<br>
* - added {@link image_negative} to invert the colors on the image<br>
* - added {@link image_greyscale} to turn the image into greyscale<br>
* - added {@link image_threshold} to apply a threshold filter on the image<br>
* - added {@link image_bevel}, {@link image_bevel_color1} and {@link image_bevel_color2} to add a bevel border<br>
* - added {@link image_border} and {@link image_border_color} to add a single color border<br>
* - added {@link image_frame} and {@link image_frame_colors} to add a multicolored frame</li>
* <li><b>v 0.19</b> 29/03/2006<br>
* - class is now compatible i18n (thanks Sylwester).<br>
* - the class can mow manipulate local files, not only uploaded files (instanciate the class with a local filename).<br>
* - {@link file_safe_name} has been improved a bit.<br>
* - added {@link image_brightness}, {@link image_contrast}, {@link image_tint_color}, {@link image_overlay_color} and {@link image_overlay_percent} to do color manipulation on the images.<br>
* - added {@link image_text} and all derivated settings to add a text label on the image.<br>
* - added {@link image_watermark} and all derivated settings to add a watermark image on the image.<br>
* - added {@link image_flip} and {@link image_rotate} for more image manipulations<br>
* - added {@link jpeg_size} to calculate the JPG compression quality in order to fit within one filesize.</li>
* <li><b>v 0.18</b> 02/02/2006<br>
* - added {@link no_script} to turn dangerous scripts into text files.<br>
* - added {@link mime_magic_check} to set the class to use mime_magic.<br>
* - added {@link preserve_transparency} *experimental*. Thanks Gregor.<br>
* - fixed size and mime checking, wasn't working :/ Thanks Willem.<br>
* - fixed memory leak when resizing images.<br>
* - when resizing, it is not necessary anymore to set {@link image_convert}.<br>
* - il is now possible to simply convert an image, with no resizing.<br>
* - sets the default {@link file_max_size} to upload_max_filesize from php.ini. Thanks Edward</li>
* <li><b>v 0.17</b> 28/05/2005<br>
* - the class can be used with any version of GD.<br>
* - added security check on the file with a list of mime-types.<br>
* - changed the license to GPL v2 only</li>
* <li><b>v 0.16</b> 19/05/2005<br>
* - added {@link file_auto_rename} automatic file renaming if the same filename already exists.<br>
* - added {@link file_safe_name} safe formatting of the filename (spaces to _underscores so far).<br>
* - added some more error reporting to avoid crash if GD is not present</li>
* <li><b>v 0.15</b> 16/04/2005<br>
* - added JPEG compression quality setting. Thanks Vad</li>
* <li><b>v 0.14</b> 14/03/2005<br>
* - reworked the class file to allow parsing with phpDocumentor</li>
* <li><b>v 0.13</b> 07/03/2005<br>
* - fixed a bug with {@link image_ratio}. Thanks Justin.<br>
* - added {@link image_ratio_no_zoom_in} and {@link image_ratio_no_zoom_out}</li>
* <li><b>v 0.12</b> 21/01/2005<br>
* - added {@link image_ratio} to resize within max values, keeping image ratio</li>
* <li><b>v 0.11</b> 22/08/2003<br>
* - update for GD2 (changed imageresized() into imagecopyresampled() and imagecreate() into imagecreatetruecolor())</li>
* Uploaded file name body (i.e. without extension)
* Uploaded file name extension
* Uploaded file MIME type
* Uploaded file size, in bytes
* Holds eventual PHP error code from $_FILES
* Uloaded file name, including server path
* Uloaded file name temporary copy
* Destination file name body (i.e. without extension)