change image size when saving image?

[halfasleeps]

i have 3 diiferent images I upload for each new product.

they are usually the same image just different sizes

so i was wondering if there was a way i could just upload 1 image and save it as 3 different images and 3 different sizes?


thanks.

[Raju Gautam]

Here is my function for this:

    function Create_ThumbNail($ImageType, $ImagePath, $rW, $rH, $img, $do="thumbnail"){
        $full_picmain = $ImagePath . "/" . $img;
        if($do != "thumbnail")
            $tsrc = "$ImagePath/$img";
        else
            $tsrc = "$ImagePath/thumbnails/$img";
        ////////////// Starting of GIF thumb nail creation///////////
        if($ImageType == "image/gif"){
            $im = imagecreatefromgif($full_picmain);
            $width = imagesx($im);                // Original picture width is stored
            $height = imagesy($im);                // Original picture height is stored
            if($width > $rW){$n_width = $rW;}
            else{$n_width = $width;}
            if($height > $rH){$n_height = $rH;}
            else{$n_height = $height;}
            $newimage = imagecreatetruecolor($n_width,$n_height);
            imagecopyresized($newimage, $im, 0, 0, 0, 0, $n_width, $n_height, $width,$height);
            if(function_exists("imagegif")) {
                header("Content-type: image/gif");
                imagegif($newimage, $tsrc);
            }
            elseif(function_exists("imagejpeg")) {
                header("Content-type: image/jpeg");
                imagejpeg($newimage,$tsrc);
            }
            chmod("$tsrc",0777);
        }
        ////// starting of JPG thumb nail creation//////////
        if($ImageType == "image/pjpeg" || $ImageType == "image/jpeg" || $ImageType == "image/jpg"){
            $im = imagecreatefromjpeg($full_picmain);
            $width = imagesx($im);              // Original picture width is stored
            $height = imagesy($im);             // Original picture height is stored
            if($width > $rW){$n_width = $rW;}
            else{$n_width = $width;}
            if($height > $rH){$n_height = $rH;}
            else{$n_height = $height;}
            $newimage = imagecreatetruecolor($n_width,$n_height);                 
            imagecopyresized($newimage, $im, 0, 0, 0, 0, $n_width, $n_height, $width,$height);
            imagejpeg($newimage, $tsrc);
            chmod("$tsrc",0777);
        }
        ////// starting of JPG thumb nail creation//////////
        if($ImageType == "image/png"){
            $im = imagecreatefrompng($full_picmain); 
            $width = imagesx($im);              // Original picture width is stored
            $height = imagesy($im);             // Original picture height is stored
            if($width > $rW){$n_width = $rW;}
            else{$n_width = $width;}
            if($height > $rH){$n_height = $rH;}
            else{$n_height = $height;}
            $newimage = imagecreatetruecolor($n_width,$n_height);                 
            imagecopyresized($newimage, $im, 0, 0, 0, 0, $n_width, $n_height, $width,$height);
            imagepng($newimage, $tsrc);
            chmod("$tsrc",0777);
        }        
    }
    # Get image extention #
    function GetImageExtention($type){
        if($type == "image/jpeg" || $type == "image/jpg" || $type == "image/pjpeg")
            return "jpg";
        elseif($type = "image/png")
            return "png";
        elseif($type == "image/gif")
            return "gif";
    } 

You can call this function like this:

$PicFile = $_FILES['PrdImg'];
for($i = 0; $i < 10; $i++){
    if(is_uploaded_file($PicFile['tmp_name'])){
        if($PicFile['size'] < 1048576 && in_array($PicFile['type'], $obj->ArrImageType)){
            $imgExt = $obj->GetImageExtention($PicFile['type']);
            $PicName = "prjpic_" . substr(md5(time()), 0, 4) . "." . $imgExt;
            $PicFullPathName = $picpath . "/" . $PicName;
            if(move_uploaded_file($PicFile['tmp_name'], $PicFullPathName)){
                $obj->Create_ThumbNail($PicFile['type'], $picpath, 100, 80, $PicName, "thumbnail"); //alternate option for thumbnail is resize
                list($width,$height) = getimagesize($PicFullPathName);
                if($width > 640){ //default size.
                    $ratio = (($width - 640) * 100) / $width;
                    $newheight = $height - ($ratio * $height / 100);
                    $obj->Create_ThumbNail($PicFile['type'], $picpath, 640, $newheight, $PicName, "resize"); //resizing the image
                }
                mysql_query("UPDATE tblproductimages SET ProductImagePath='$PicName' WHERE PictureID='$newpicid'") or die(mysql_error());
            }
        }
    }//is picture uploaded
}//for 

I have these functions in a lirbary function that's why i have used object to call the function. I think this will help you.

Feel free to ask if you could not get it.