php实现从上传文件创建缩略图的方法
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,0,0,0,0, $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,$pic,0,0,0,0, $large_width, $large_height, $large_width, $large_height);
if (imagejpeg($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
}
?>
create thumb
希望本文所述对大家的php程序设计有所帮助。