php实现从上传文件创建缩略图的方法
发布时间：2020-05-23 23:58:47 所属栏目：PHP 来源：互联网
导读：这篇文章主要介绍了php实现从上传文件创建缩略图的方法,涉及php操作上传文件及图片操作的技巧,具有一定参考借鉴价值,需要的朋友可以参考下
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本文实例讲述了php实现从上传文件创建缩略图的方法。分享给大家供大家参考。具体实现方法如下： 102400){ $error=1; $msg = "The photo is over 100kb. Please try again."; } //////////////////////////////// // CHECK TYPE (IE AND OTHERS) // if ($userfile_type="image/pjpeg"){ if ($userfile_type!="image/jpeg"){ $error=1; $msg = "The photo must be JPG"; } } ////////////////////////////// //CHECK WIDTH/HEIGHT // if ($large_width!=600 or$large_height!=400){ $error=1; $msg = "The photo must be 600x400 pixels"; } /////////////////////////////////////////// //CREATE THUMB / UPLOAD THUMB AND PHOTO /// if ($error<>1){ $image = $userfile_name; //if you want to insert it to the database $pic = imagecreatefromjpeg($userfile); $small = imagecreatetruecolor($small_width,$small_height); imagecopyresampled($small,$pic,$small_width,$small_height,$large_width,$large_height); if (imagejpeg($small,"path/to/folder/to/upload/thumb".$userfile_name,100)){ $large = imagecreatetruecolor($large_width,$large_height); imagecopyresampled($large,$large_height,$large_height); if (imagejpeg($large,"path/to/folder/to/upload/photo".$userfile_name,100)) {} else {$msg="A problem has occured. Please try again."; $error=1;} } else { $msg="A problem has occured. Please try again."; $error=1; } } ////////////////////////////////////////////// /// If everything went right a photo (600x400) and /// a thumb(120x90) were uploaded to the given folders } ?> |