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php生成图片缩略图的方法

时间:2021-07-01 10:21:17 帮助过:3人阅读

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);
}

希望本文所述对大家的php程序设计有所帮助。

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