PHP generation thumbnail Classic class _php tutorial

From the foreign web site found a php generated thumbnail code, the need for friends can refer to.

The code is as follows

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/* * File:SimpleImage.php * Author:simon Jarvis * copyright:2006 Simon Jarvis * date:08/11/06 * link:http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php * * This program was free software; You can redistribute it and/or * Modify it under the terms of the GNU general public License * As published by the Free software Foundation; Either version 2 * of the License, or (at your option) any later version. * * This program was distributed in the hope that it'll 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-more details: * http://www.gnu.org/licenses/gpl.html * */ Class SimpleImage { var $image; var $image _type; function Load ($filename) { $image _info = getimagesize ($filename); $this->image_type = $image _info[2]; if ($this->image_type = = imagetype_jpeg) { $this->image = Imagecreatefromjpeg ($filename); } elseif ($this->image_type = = imagetype_gif) { $this->image = imagecreatefromgif ($filename); } elseif ($this->image_type = = imagetype_png) { $this->image = imagecreatefrompng ($filename); } } function Save ($filename, $image _type=imagetype_jpeg, $compression =75, $permissions =null) { if ($image _type = = imagetype_jpeg) { Imagejpeg ($this->image, $filename, $compression); } elseif ($image _type = = imagetype_gif) { Imagegif ($this->image, $filename); } elseif ($image _type = = imagetype_png) { Imagepng ($this->image, $filename); } if ($permissions! = null) { chmod ($filename, $permissions); } } function output ($image _type=imagetype_jpeg) { if ($image _type = = imagetype_jpeg) { Imagejpeg ($this->image); } elseif ($image _type = = imagetype_gif) { Imagegif ($this->image); } elseif ($image _type = = imagetype_png) { Imagepng ($this->image); } } function GetWidth () { Return Imagesx ($this->image); } function GetHeight () { Return Imagesy ($this->image); } function Resizetoheight ($height) { $ratio = $height/$this->getheight (); $width = $this->getwidth () * $ratio; $this->resize ($width, $height); } function Resizetowidth ($width) { $ratio = $width/$this->getwidth (); $height = $this->getheight () * $ratio; $this->resize ($width, $height); } function scale ($scale) { $width = $this->getwidth () * $scale/100; $height = $this->getheight () * $scale/100; $this->resize ($width, $height); } function Resize ($width, $height) { $new _image = Imagecreatetruecolor ($width, $height); Imagecopyresampled ($new _image, $this->image, 0, 0, 0, 0, $width, $height, $this->getwidth (), $this->getheight ( )); $this->image = $new _image; } } ?>

Usage
Save the above file as simpleimage.php and take a look at the following examples for use the script.

The first example below would load a file named Picture.jpg resize it to + pixels wide and pixels high and resave it As Picture2.jpg

The code is as follows	Copy Code
Include (' simpleimage.php '); $image = new SimpleImage (); $image->load (' picture.jpg '); $image->resize (250,400); $image->save (' picture2.jpg '); ?>

If you want to resize to a specifed width but keep the dimensions ratio the same and the script can work out the required Height for your, just use the Resizetowidth function

The code is as follows	Copy Code
Include (' simpleimage.php '); $image = new SimpleImage (); $image->load (' picture.jpg '); $image->resizetowidth (250); $image->save (' picture2.jpg '); ?>

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