How do you make thumbnails on upload with phpthumb?

问题

I'm having a very problematic error with phpthumb: http://phpthumb.gxdlabs.com/ So basically, I have a form which uploads a profile picture. The uploading seems to work because it uploads the image in the directory. The problem is that it doesn't generate the thumbnails but I'm sure that all the variables and names are correct. It gives me the following error. Specifically 'Image file not found':

Fatal error: Uncaught exception 'Exception' with message 'Image file not found: ����' in {PATH}\phpthumb\ThumbBase.inc.php:193 Stack trace: #0 {PATH}\phpthumb\ThumbBase.inc.php(172): ThumbBase->triggerError('Image file not ...') #1 {PATH}\phpthumb\ThumbBase.inc.php(110): ThumbBase->fileExistsAndReadable() #2 {PATH}\phpthumb\GdThumb.inc.php(96): ThumbBase->__construct('??????JFIF?????...', false) #3 G:\EasyPHP\www\YourSlab\phpthumb\ThumbLib.inc.php(127): GdThumb->__construct('??????JFIF?????...', Array, false) #4 {PATH}\edit_profile.php(74): PhpThumbFactory::create('??????JFIF?????...') #5 {PATH}\edit_profile.php(80): generateThumbnail->createthumbnail(25) #6 {PATH}\edit_profile.php(118): set_profile_info('Mico Abrina', '1', 'asdf', 'asdf', '', 'asdf', 'asdf', '', '05', '4', '1996', 'G:\EasyPHP\tmp\...') #7 {main} thrown in {PATH}\phpthumb\ThumbBase.inc.php on line 193

I think its because I'm generating the thumbnails right after uploading it. How do I make it work?

<?php
    //upload images
    if (file_exists($profile_pic)) {
        $src_size = getimagesize($profile_pic); 

        if ($src_size['mime'] === 'image/jpeg'){
            $src_img = imagecreatefromjpeg($profile_pic);   
        } else if ($src_size['mime'] === 'image/png') {
            $src_img = imagecreatefrompng($profile_pic);
        } else if ($src_size['mime'] === 'image/gif') {
            $src_img = imagecreatefromgif($profile_pic);    
        } else {
            $src_img = false;   
        }

        if ($src_img !== false) {
            $md5sessionid = md5($_SESSION['user_id'].'asdf');
            imagejpeg($src_img, "profile_pic/$md5sessionid.jpg");
            //end of uploading images

            //image thumbnail creation class
            class generateThumbnail {
                public function createthumbnail($size) {
                $md5sessionidsecret = md5($_SESSION['user_id'].'asdf');
                $md5sessionidthumb = md5($md5sessionidsecret.''.$size);
                $path_to_thumb_pic = 'profile_pic/'.$md5sessionidthumb.'.jpg';
                $profile_pic = file_get_contents('profile_pic/'.$md5sessionidsecret.'.jpg');
                $thumb_profile_pic = PhpThumbFactory::create($profile_pic);
                $thumb_profile_pic->adaptiveResize($size, $size);
                $thumb_profile_pic->save($path_to_thumb_pic);
                }
            }
            //make the thumbnails
            $createThumbnail = new generateThumbnail();
            $createThumbnail->createthumbnail(25);
            $createThumbnail->createthumbnail(75);
            $createThumbnail->createthumbnail(175);
        }
    }
?>

回答1:

It appears that PhpThumbFactory::create() takes a file path as its first argument, unless you specify true for the third isDataStream argument. That is why you are getting the strange output in the exception where it says Image File Not Found.

You could do a few things to fix it:

// Either skip the file_get_contents call and pass the file path directly
$thumb_profile_pic = PhpThumbFactory::create('profile_pic/'.$md5sessionidsecret.'.jpg');

// or set the 3rd parameter isDataStream to true
$profile_pic = file_get_contents('profile_pic/'.$md5sessionidsecret.'.jpg');
$thumb_profile_pic = PhpThumbFactory::create($profile_pic, array(), true);

来源：https://stackoverflow.com/questions/9347698/how-do-you-make-thumbnails-on-upload-with-phpthumb

标签

php

upload

image

phpthumb