<?
/**
* php从上传的文件创建缩略图
*
* @param
* @author 编程之家 jb51.cc jb51.cc
**/
if ($_REQUEST['action']==add){
$userfile = $HTTP_POST_FILES['photo']['tmp_name'];
$userfile_name = $HTTP_POST_FILES['photo']['name'];
$userfile_size = $HTTP_POST_FILES['photo']['size'];
$userfile_type = $HTTP_POST_FILES['photo']['type'];
/////////////////////////
//GET-DECLARE DIMENSIONS //
$dimension = getimagesize($userfile);
$large_width = $dimension[0]; // GET PHOTO WIDTH
$large_height = $dimension[1]; //GET PHOTO HEIGHT
$small_width = 120; // DECLARE THUMB WIDTH
$small_height = 90; // DECLARE THUMB HEIGHT
/////////////////////////
//CHECK SIZE //
if ($userfile_size>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
}
/*** 来自编程之家 jb51.cc(jb51.cc) ***/
?>
经测试代码如下:
<html><head><title>create thumb jb51.cc</title></head>
<body>
<form name=form1 enctype=multipart/form-data action=thisfile.php?action=add method=post>
Select Photo: <input type=file name=photo>
<input type=submit name=submit value=CREATE THUMB AND UPLOAD>
</form>
</body
</html>
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