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GD2library
functionmake_thumb($src,$dest,$desired_width)
{
/*readthesourceimage*/
$source_image=imagecreatefromjpeg($src);
$width=imagesx($source_image);
$height=imagesy($source_image);
/*findthe"desiredheight"ofthisthumbnail,relativetothedesiredwidth*/
$desired_height=floor($height*($desired_width/$width));
/*createanew,"virtual"image*/
$virtual_image=imagecreatetruecolor($desired_width,$desired_height);
/*copysourceimageataresizedsize*/
imagecopyresized($virtual_image,$source_image,0,0,0,0,$desired_width,$desired_height,$width,$height);
/*createthephysicalthumbnailimagetoitsdestination*/
imagejpeg($virtual_image,$dest,83);
}
希望本文所述对大家的php程序设计有所帮助。