php生成图片缩略图的方法

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)
{
 
  
  $source_image = imagecreatefromjpeg($src);
  $width = imagesx($source_image);
  $height = imagesy($source_image);
  
  $desired_height = floor($height*($desired_width/$width));
  
  $virtual_image = imagecreatetruecolor($desired_width,$desired_height);
  
  imagecopyresized($virtual_image,$source_image,0,0,0,0,$desired_width,$desired_height,$width,$height);
  
  imagejpeg($virtual_image,$dest, 83);
}

希望本文所述对大家的php程序设计有所帮助。