php生成图片缩略图的方法
这篇文章主要介绍了php生成图片缩略图的方法,涉及php操作图片的技巧,非常具有实用价值,需要的朋友可以参考下.
本文实例讲述了php生成图片缩略图的方法,分享给大家供大家参考,具体如下：
这里需要用到GD2 library
- function make_thumb($src,$dest,$desired_width)
- {
- /* read the source image */
- $source_image = imagecreatefromjpeg($src);
- $width = imagesx($source_image);
- $height = imagesy($source_image);
- /* find the "desired height" of this thumbnail, relative to the desired width */
- $desired_height = floor($height*($desired_width/$width));
- /* create a new, "virtual" image */
- $virtual_image = imagecreatetruecolor($desired_width,$desired_height);
- /* copy source image at a resized size */
- imagecopyresized($virtual_image,$source_image,0,0,0,0,$desired_width,$desired_height,$width,$height);
- /* create the physical thumbnail image to its destination */
- imagejpeg($virtual_image,$dest, 83);
- }