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class.upload.php

Homepage : http://www.verot.net/php_class_upload.htm

Demo : http://www.verot.net/php_class_upload_samples.htm

Donations: http://www.verot.net/php_class_upload_donate.htm

Commercial use: http://www.verot.net/php_class_upload_license.htm

What does it do?

This class 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 also supports Flash uploaders and XMLHttpRequest.

The class works with PHP 4, 5 and 7, and its error messages can be localized at will.

Install via composer

Edit your composer.json file to include the following:

Demo and examples

Check out the test/ directory, which you can load in your browser. You can test the class and its different ways to instantiate it, see some code examples, and run some tests.

How to use it?

Create a simple HTML file, with a form such as:

Create a file called upload.php (into which you have first loaded the class):

How does it work?

You instanciate the class with the $_FILES['my_field'] array where _myfield 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 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 reset once it is done.

You can repeat setting up a new set of processing variables, and calling process() again as many times as you want. When you have finished, you can call clean() to delete the original uploaded file.

If you don't set any processing parameters and call 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 enctype="multipart/form-data" in your form tag <form> if you want your form to upload the file.

How to process local files?

Instantiate the class with the local filename, as following:

How to process a file uploaded via XMLHttpRequest?

Instantiate the class with the special php: keyword, as following:

Prefixing the argument with php: tells the class to retrieve the uploaded data in php://input, and the rest is the stream's filename, which is generally in $_SERVER['HTTP_X_FILE_NAME']. But you can use any other name you see fit:

How to process raw file data?

Instantiate the class with the special data: keyword, as following:

If your data is base64-encoded, the class provides a simple base64: keyword, which will decode your data prior to using it:

How to set the language?

Instantiate the class with a second argument being the language code:

How to output the resulting file or picture directly to the browser?

Simply call process() without an argument (or with null as first argument):

Or if you want to force the download of the file:

Troubleshooting

If the class doesn't do what you want it to do, you can display the log, in order to see in details what the class does. To obtain the log, just add this line at the end of your code:

Your problem may have been already discussed in the Frequently Asked Questions : http://www.verot.net/php_class_upload_faq.htm

Failing that, you can search in the forums, and ask a question there: http://www.verot.net/php_class_upload_forum.htm. Please don't use Github issues to ask for help.

Processing parameters

Note: all the parameters in this section are reset after each process.

File handling

• file_new_name_body replaces the name body (default: null)

• file_name_body_add appends to the name body (default: null)

• file_name_body_pre prepends to the name body (default: null)

• file_new_name_ext replaces the file extension (default: null)

• file_safe_name formats the filename (spaces changed to _, etc...) (default: true)

• file_force_extension forces an extension if there isn't any (default: true)

• file_overwrite sets behaviour if file already exists (default: false)

• file_auto_rename automatically renames file if it already exists (default: true)

• dir_auto_create automatically creates destination directory if missing (default: true)

• dir_auto_chmod automatically attempts to chmod the destination directory if not writeable (default: true)

• dir_chmod chmod used when creating directory or if directory not writeable (default: 0777)

• file_max_size sets maximum upload size (default: _upload_maxfilesize from php.ini)

• mime_check sets if the class check the MIME against the allowed list (default: true)

• no_script sets if the class turns scripts into text files (default: true)

• allowed array of allowed mime-types (or one string). wildcard accepted, as in image/* (default: check init())

• forbidden array of forbidden mime-types (or one string). wildcard accepted, as in image/* (default: check init())

Image handling

• image_convert if set, image will be converted (possible values : ''|'png'|'jpeg'|'gif'|'bmp'; default: '')

• image_background_color if set, will forcibly fill transparent areas with the color, in hexadecimal (default: null)

• image_default_color fallback color background color for non alpha-transparent output formats, such as JPEG or BMP, in hexadecimal (default: #FFFFFF)

• png_compression sets the compression level for PNG images, between 1 (fast but large files) and 9 (slow but smaller files) (default: null (Zlib default))

• jpeg_quality sets the compression quality for JPEG images (default: 85)

• jpeg_size if set to a size in bytes, will approximate jpeg_quality so the output image fits within the size (default: null)

• image_interlace if set to true, the image will be saved interlaced (if it is a JPEG, it will be saved as a progressive PEG) (default: false)

Image checking

The following eight settings can be used to invalidate an upload if the file is an image (note that _openbasedir restrictions prevent the use of these settings)

• image_max_width if set to a dimension in pixels, the upload will be invalid if the image width is greater (default: null)

• image_max_height if set to a dimension in pixels, the upload will be invalid if the image height is greater (default: null)

• image_max_pixels if set to a number of pixels, the upload will be invalid if the image number of pixels is greater (default: null)

• image_max_ratio if set to a aspect ratio (width/height), the upload will be invalid if the image apect ratio is greater (default: null)

• image_min_width if set to a dimension in pixels, the upload will be invalid if the image width is lower (default: null)

• image_min_height if set to a dimension in pixels, the upload will be invalid if the image height is lower (default: null)

• image_min_pixels if set to a number of pixels, the upload will be invalid if the image number of pixels is lower (default: null)

• image_min_ratio if set to a aspect ratio (width/height), the upload will be invalid if the image apect ratio is lower (default: null)

Image resizing

• image_resize determines is an image will be resized (default: false)

The following variables are used only if _imageresize == true

• image_x destination image width (default: 150)

• image_y destination image height (default: 150)

Use either one of the following

• image_ratio if true, resize image conserving the original sizes ratio, using image_x AND image_y as max sizes if true (default: false)

• image_ratio_crop if true, resize image conserving the original sizes ratio, using image_x AND 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)

• image_ratio_fill if true, resize image conserving the original sizes ratio, using image_x AND 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)

• image_ratio_x if true, resize image, calculating image_x from image_y and conserving the original sizes ratio (default: false)

• image_ratio_y if true, resize image, calculating image_y from image_x and conserving the original sizes ratio (default: false)

• image_ratio_pixels if set to a long integer, resize image, calculating image_y and image_x to match a the number of pixels (default: false)

And eventually prevent enlarging or shrinking images

• image_no_enlarging cancel resizing if the resized image is bigger than the original image, to prevent enlarging (default: false)

• image_no_shrinking cancel resizing if the resized image is smaller than the original image, to prevent shrinking (default: false)

Image effects

The following image manipulations require GD2+

• image_brightness if set, corrects the brightness. value between -127 and 127 (default: null)

• image_contrast if set, corrects the contrast. value between -127 and 127 (default: null)

• image_opacity if set, changes the image opacity. value between 0 and 100 (default: null)

• image_tint_color if set, will tint the image with a color, value as hexadecimal #FFFFFF (default: null)

• image_overlay_color if set, will add a colored overlay, value as hexadecimal #FFFFFF (default: null)

• image_overlay_opacity used when image_overlay_color is set, determines the opacity (default: 50)

• image_negative inverts the colors in the image (default: false)

• image_greyscale transforms an image into greyscale (default: false)

• image_threshold applies a threshold filter. value between -127 and 127 (default: null)

• image_pixelate pixelate an image, value is block size (default: null)

• image_unsharp applies an unsharp mask, with alpha transparency support (default: false)

• image_unsharp_amount unsharp mask amount, typically 50 - 200 (default: 80)

• image_unsharp_radius unsharp mask radius, typically 0.5 - 1 (default: 0.5)

• image_unsharp_threshold unsharp mask threshold, typically 0 - 5 (default: 1)

Image text

• image_text creates a text label on the image, value is a string, with eventual replacement tokens (default: null)

• image_text_direction text label direction, either 'h' horizontal or 'v' vertical (default: 'h')

• image_text_color text color for the text label, in hexadecimal (default: #FFFFFF)

• image_text_opacity text opacity on the text label, integer between 0 and 100 (default: 100)

• image_text_background text label background color, in hexadecimal (default: null)

• image_text_background_opacity text label background opacity, integer between 0 and 100 (default: 100)

• image_text_font built-in font for the text label, from 1 to 5. 1 is the smallest (default: 5). Value can also be a string, which represents the path to a GDF or TTF font (TrueType).

• image_text_size font size for TrueType fonts, in pixels (GD1) or points (GD1) (default: 16) (TrueType fonts only)

• image_text_angle text angle for TrueType fonts, in degrees, with 0 degrees being left-to-right reading text(default: null) (TrueType fonts only)

• image_text_x absolute text label position, in pixels from the left border. can be negative (default: null)

• image_text_y absolute text label position, in pixels from the top border. can be negative (default: null)

• image_text_position text label position withing the image, a combination of one or two from 'TBLR': top, bottom, left, right (default: null)

• image_text_padding text label padding, in pixels. can be overridden by image_text_padding_x and image_text_padding_y (default: 0)

• image_text_padding_x text label horizontal padding (default: null)

• image_text_padding_y text label vertical padding (default: null)

• image_text_alignment text alignment when text has multiple lines, either 'L', 'C' or 'R' (default: 'C') (GD fonts only)

• image_text_line_spacing space between lines in pixels, when text has multiple lines (default: 0) (GD fonts only)

Image transformations

• image_auto_rotate automatically rotates the image according to EXIF data (JPEG only) (default: true, applies even if there is no image manipulations)

• image_flip flips image, wither 'h' horizontal or 'v' vertical (default: null)

• image_rotate rotates image. Possible values are 90, 180 and 270 (default: null)

• image_crop 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)

• image_precrop crops image, before an eventual resizing. 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)

Image borders

• image_bevel adds a bevel border to the image. value is thickness in pixels (default: null)

• image_bevel_color1 top and left bevel color, in hexadecimal (default: #FFFFFF)

• image_bevel_color2 bottom and right bevel color, in hexadecimal (default: #000000)

• image_border 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)

• image_border_color border color, in hexadecimal (default: #FFFFFF)

• image_border_opacity border opacity, integer between 0 and 100 (default: 100)

• image_border_transparent adds a fading-to-transparent 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)

• image_frame type of frame: 1=flat 2=crossed (default: null)

• image_frame_colors list of hex colors, in an array or a space separated string (default: '#FFFFFF #999999 #666666 #000000')

• image_frame_opacity frame opacity, integer between 0 and 100 (default: 100)

Image watermark

• image_watermark adds a watermark on the image, value is a local filename. accepted files are GIF, JPG, BMP, PNG and PNG alpha (default: null)

• image_watermark_x absolute watermark position, in pixels from the left border. can be negative (default: null)

• image_watermark_y absolute watermark position, in pixels from the top border. can be negative (default: null)

• image_watermark_position watermark position withing the image, a combination of one or two from 'TBLR': top, bottom, left, right (default: null)

• image_watermark_no_zoom_in prevents the watermark to be resized up if it is smaller than the image (default: true)

• image_watermark_no_zoom_out prevents the watermark to be resized down if it is bigger than the image (default: false)

Image reflections

• image_reflection_height if set, a reflection will be added. Format is either in pixels or percentage, such as 40, '40', '40px' or '40%' (default: null)

• image_reflection_space space in pixels between the source image and the reflection, can be negative (default: null)

• image_reflection_color reflection background color, in hexadecimal. Now deprecated in favor of image_default_color (default: #FFFFFF)

• image_reflection_opacity opacity level at which the reflection starts, integer between 0 and 100 (default: 60)

Values that can be read before calling process()

• file_src_name Source file name
• file_src_name_body Source file name body
• file_src_name_ext Source file extension
• file_src_pathname Source file complete path and name
• file_src_mime Source file mime type
• file_src_size Source file size in bytes
• file_src_error Upload error code
• file_is_image Boolean flag, true if the file is a supported image type

If the file is a supported image type (and _openbasedir restrictions allow it)

• image_src_x Source file width in pixels
• image_src_y Source file height in pixels
• image_src_pixels Source file number of pixels
• image_src_type Source file type (png, jpg, gif or bmp)
• image_src_bits Source file color depth

Values that can be read after calling process()

• file_dst_path Destination file path
• file_dst_name_body Destination file name body
• file_dst_name_ext Destination file extension
• file_dst_name Destination file name
• file_dst_pathname Destination file complete path and name

If the file is a supported image type

• image_dst_type Destination file type (png, jpg, gif or bmp)
• image_dst_x Destination file width
• image_dst_y Destination file height

Requirements

Most of the image operations require GD. GD2 is greatly recommended

The class requires PHP 4.3+, and is compatible with PHP 5 and PHP 7

Changelog

master

• better file name sanitization

v 1.0.2 27/08/2018

• Rename of upload class
• Add namespace Verot\Uploader
• Change composer.json and autoload by psr-4
• Add exception handle by error type. Example Size, Extension invalid

v 0.34 11/03/2018

• added support for UTF-8 text and TrueType fonts
• add support for raw file data and base64 encoded file data
• remove deprecated properties
• better checking of function availability
• added image_no_enlarging and image_no_shrinking to replace image_ratio_no_zoom_in and image_ratio_no_zoom_out
• checks JPEG auto-rotate even if there is no image manipulation
• better handling of base64 input and error reporting
• updated Swedish and Turkish translation

v 0.33 16/07/2016

• added PHP7 compatibility
• fixed filesize when using XMLHttpRequest
• added Hungarian translation
• added Tamil translation
• added Finnish translation
• fixed Turkish translation
• updated regex rules for MIME detection
• added composer.json
• updated code for GIT publishing
• auto-rotate JPEG according to EXIF data

v 0.32 15/01/2013

• add support for XMLHttpRequest uploads
• added image_pixelate
• added image_interlace
• added png_compression to change PNG compressoin level
• deactivate exec() if Suhosin is enabled
• add more extension to dangerous scripts detection
• imagejpeg takes null as second argument since PHP 5.4
• default PECL Fileinfo MAGIC path to null
• set gd.jpeg_ignore_warning to true by default
• fixed file name normalization

v 0.31 11/04/2011

• added _application/x-rar` MIME type
• make sure exec() and ini_get_all() function are not disabled if we want to use them
• make sure that we don't divide by zero when calculating JPEG size
• allowed and forbidden can now accept strings
• try to guess the file extension from the MIME type if there is no file extension
• better class properties when changing the file extension
• added file_force_extension to allow extension-less files if needed
• better file safe conversion of the filename
• allow shorthand byte values, such as 1K, 2M, 3G for file_max_size and jpeg_size
• added image_opacity to change picture opacity
• added image_border_opacity to allow semi-transparent borders
• added image_frame_opacity to allow semi-transparent frames
• added image_border_transparent to allow borders fading to transparent
• duplicated image_overlay_percent into image_overlay_opacity
• duplicated image_text_percent into image_text_opacity
• duplicated image_text_background_percent into image_text_background_opacity

v 0.30 05/09/2010

• implemented an unsharp mask, with alpha transparency support, activated if image_unsharp is true. added image_unsharp_amount, image_unsharp_radius, and image_unsharp_threshold
• added text/rtf MIME type, and no_script exception
• corrected bug when no_script is activated and several process() are called
• better error handling for finfo
• display _upload_maxfilesize information from php.ini in the log
• automatic extension for extension-less images
• fixed image_ratio_fill top and left filling
• fixed alphablending issue when applying a transparent PNG watermark on a transparent PNG
• added image_watermark_no_zoom_in and image_watermark_no_zoom_out to allow the watermark to be resized down (or up) to fit in the image. By default, the watermark may be resized down, but not up.

v 0.29 03/02/2010

• added protection against malicious images
• added zip and torrent MIME type
• replaced split() with explode()
• initialise image_dst_x/y with image_src_x/y
• removed mime_fileinfo, mime_file, mime_magic and mime_getimagesize from the docs since they are used before process
• added more extensions and MIME types
• improved MIME type validation
• improved logging

v 0.28 10/08/2009

• replaced ereg functions to be compatible with PHP 5.3
• added flv MIME type
• improved MIME type detection
• added file_name_body_pre to prepend a string to the file name
• added mime_fileinfo, mime_file, mime_magic and mime_getimagesize so that it is possible to deactivate some MIME type checking method
• use exec() rather than shell_exec(), to play better with safe mode
• added some error messages
• fix bug when checking on conditions, processed wasn't propagated properly

v 0.27 14/05/2009

• look for the language files directory from `_FILE__
• deactivate file_auto_rename if file_overwrite is set
• improved transparency replacement for true color images
• fixed calls to newer version of UNIX file utility
• fixed error when using PECL Fileinfo extension in SAFE MODE, and when using the finfo class
• added image_precrop to crop the image before an eventual resizing

v 0.26 13/11/2008

• rewrote conversion from palette to true color to handle transparency better
• fixed imagecopymergealpha() when the overlayed image is of wrong dimensions
• fixed imagecreatenew() when the image to create have less than 1 pixels width or height
• rewrote MIME type detection to be more secure and not rely on browser information; now using Fileinfo PECL extension, UNIX file() command, MIME magic, and getimagesize(), in that order
• added support for Flash uploaders
• some bug fixing and error handling

v 0.25 17/11/2007

• added translation files and mechanism to instantiate the class with a language different from English
• added forbidden to set an array of forbidden MIME types
• implemented support for simple wildcards in allowed and forbidden, such as image/*
• preset the file extension to the desired conversion format when converting an image
• added read and write support for BMP images
• added a flag file_is_image to determine if the file is a supported image type
• the class now provides some information about the image, before calling process(). Available are image_src_x, image_src_y and the newly introduced image_src_bits, image_src_pixels and image_src_type. Note that this will not work if open_basedir restrictions are in place
• improved logging; now provides useful system information
• added some more pre-processing checks for files that are images: image_max_width, image_max_height, image_max_pixels, image_max_ratio, image_min_width, image_min_height, image_min_pixels and image_min_ratio
• added image_ratio_pixels to resize an image to a number of pixels, keeping aspect ratio
• added image_is_palette and image_is_transparent and image_transparent_color for GIF images
• added image_default_color to define a fallback color for non alpha-transparent output formats, such as JPEG or BMP
• changed image_background_color, which now forces transparent areas to be painted
• improved reflections and color overlays so that it works with alpha transparent images
• image_reflection_color is now deprecated in favour of image_default_color
• transparent PNGs are now processed in true color, and fully preserving the alpha channel when doing merges
• transparent GIFs are now automatically detected. preserve_transparency is deprecated
• transparent true color images can be saved as GIF while retaining transparency, semi transparent areas being merged with image_default_color
• transparent true color images can be saved as JPG/BMP with the semi transparent areas being merged with image_default_color
• fixed conversion of images to true color
• 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 argument, or no argument

v 0.24 25/05/2007

• added image_background_color, to set the default background color of an image
• added possibility of using replacement tokens in text labels
• changed default JPEG quality to 85
• fixed a small bug when using greyscale filter and associated filters
• added image_ratio_fill in order to fit an image within some dimensions and color the remaining space. Very similar to image_ratio_crop
• improved the recursive creation of directories
• the class now converts palette based images to true colors before doing graphic manipulations

v 0.23 23/12/2006

• fixed a bug when processing more than once the same uploaded file. If there is an _openbasedir 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()

v 0.22 16/12/2006

• added automatic creation of a temporary file if the upload directory is not within open_basedir
• fixed a bug which was preventing to work on a local file by overwriting it with its processed copy
• added MIME types video/x-ms-wmv and image/x-png and fixed PNG support for IE weird MIME types
• modified image_ratio_crop so it can accept one or more from string 'TBLR', determining which side of the image is kept while cropping
• added support for multiple lines in the text, using "\n" as a line break
• added image_text_line_spacing which allow to set the space between several lines of text
• added image_text_alignment which allow to set the alignment when text has several lines
• image_text_font can now be set to the path of a GDF font to load external fonts
• added image_reflection_height to create a reflection of the source image, which height is in pixels or percentage
• added image_reflection_space to set the space in pixels between the source image and the reflection
• added image_reflection_color to set the reflection background color
• added image_reflection_opacity to set the initial level of opacity of the reflection

v 0.21 30/09/2006

• added image_ratio_crop which resizes within image_x and image_y, keeping ratio, but filling the space by cropping excedent of image
• added mime_check, which default is true, to set checks against allowed MIME list
• if MIME is empty, the class now triggers an error
• color #000000 is OK for image_text_color, and related text transparency bug fixed
• gd_version() now uses gd_info(), or else phpinfo()
• fixed path issue when the destination path has no trailing slash on Windows systems
• removed inline functions to be fully PHP5 compatible

v 0.20 11/08/2006

• added some more error checking and messages (GD presence, permissions...)
• fix when uploading files without extension
• changed values for image_brightness and image_contrast to be between -127 and 127
• added dir_auto_create to automatically and recursively create destination directory if missing.
• added dir_auto_chmod to automatically chmod the destination directory if not writeable.
• added dir_chmod to set the default chmod to use.
• added image_crop to crop images
• added image_negative to invert the colors on the image
• added image_greyscale to turn the image into greyscale
• added image_threshold to apply a threshold filter on the image
• added image_bevel, image_bevel_color1 and image_bevel_color2 to add a bevel border
• added image_border and image_border_color to add a single color border
• added image_frame and image_frame_colors to add a multicolored frame

v 0.19 29/03/2006

• class is now compatible i18n (thanks Sylwester).
• the class can mow manipulate local files, not only uploaded files (instanciate the class with a local filename).
• file_safe_name has been improved a bit.
• added image_brightness, image_contrast, image_tint_color, image_overlay_color and image_overlay_percent to do color manipulation on the images.
• added image_text and all derivated settings to add a text label on the image.
• added image_watermark and all derivated settings to add a watermark image on the image.
• added image_flip and image_rotate for more image manipulations
• added jpeg_size to calculate the JPG compression quality in order to fit within one filesize.

v 0.18 02/02/2006

• added no_script to turn dangerous scripts into text files.
• added mime_magic_check to set the class to use mime_magic.
• added preserve_transparency experimental. Thanks Gregor.
• fixed size and mime checking, wasn't working :/ Thanks Willem.
• fixed memory leak when resizing images.
• when resizing, it is not necessary anymore to set image_convert.
• il is now possible to simply convert an image, with no resizing.
• sets the default file_max_size to _upload_maxfilesize from php.ini. Thanks Edward

v 0.17 28/05/2005

• the class can be used with any version of GD.
• added security check on the file with a list of mime-types.
• changed the license to GPL v2 only

v 0.16 19/05/2005

• added file_auto_rename automatic file renaming if the same filename already exists.
• added file_safe_name safe formatting of the filename (spaces to underscores so far).
• added some more error reporting to avoid crash if GD is not present

v 0.15 16/04/2005

• added JPEG compression quality setting. Thanks Vad

v 0.14 14/03/2005

• reworked the class file to allow parsing with phpDocumentor

v 0.13 07/03/2005

• fixed a bug with image_ratio. Thanks Justin.
• added image_ratio_no_zoom_in and image_ratio_no_zoom_out

v 0.12 21/01/2005

• added image_ratio to resize within max values, keeping image ratio

v 0.11 22/08/2003

• update for GD2 (changed imageresized() into imagecopyresampled() and imagecreate() into imagecreatetruecolor())