I am doing products import php script for prestashop 1.3.1 and I have one problem. I have URL of picture, but i dont know hoe to use it and make different images (thumbnails it is called I think).
If I have picture http://www.nordix.cz/img/p/824-2268.jpg what I must write in PHP to make thubnails?
Thank you so much for tips!
To process an image (create thumbs) first you have to copy it to a local directory. You can't do any processing on an image which is on another server or url. So here is how i did it in one of my PS project.
1) First check if the image exists or not. You can do it by using fopen in read mode, if it returns true, then the file exists. It is a good practice to do it because it will avoid unnecessary calls to the remote server.
$imageUrl = "http://www.nordix.cz/img/p/824-2268.jpg";
#fopen($imageUrl, "r");
2) Now you have the image as the fopen returned true, you need to copy the image to the PS temp directory as below
$tmpName = tempnam(_PS_TMP_IMG_DIR_, 'PS');
copy($imageUrl , $tmpName);
after the copy function downloads the image to PS temp directory, then you can process that image as you want. Remember that you have to make all processing on $tempName, as it is the file now. $tempName is like $_FILES['imageFieldName']['tmp_name'].
Thank you
Prestashop provides a set of function to process images. I've never worked on 1.3 but in 1.4 they are located in /images.inc.php (they made a class in 1.5). Take a look at this file and you will find all the function you will need, especially imageResize()
Related
Well, I've uploaded an app to Heroku, and I've discovered that I can't upload files to it. Then I started to use Dropbox as storage option, and I've done a few tests, of send and retrieve link, and all worked fine.
Now, the problem is to use the uploadFile() method on DropboxAdapter. He accepts an resource as the file, and I did'nt work well. I've done a few tests, and still no way. Here is what I am doing, if anyone could me point a solution, or a direction to this problem, please. :)
Here is my actual code for the update user (Update the user image, and get the link to the file).
$input = $_FILES['picture'];
$inputName = $input['name'];
$image = imagecreatefromstring(file_get_contents($_FILES['picture']['tmp_name']));
Storage::disk('dropbox')->putStream('/avatars/' . $inputName, $image);
// $data = Storage::disk('dropbox')->getLink('/avatars/' . $inputName);
return dd($image);
In some tests, using fopen() into a file on the disk, and doing the same process, I've noticed this:
This is when I've used fopen() on a file stored on the public folder
http://i.imgur.com/07ZiZD5.png
And this, when i've die(var_dump()) the $image that I've tried to create. (Which is a suggestion from this two links: PHP temporary file upload not valid Image resource, Dropbox uploading within script.
http://i.imgur.com/pSv6l1k.png
Any Idea?
Try a simple fopen on the uploaded file:
$image = fopen($_FILES['picture']['tmp_name'], 'r');
https://www.php.net/manual/en/function.fopen.php
You don't need an image stream but just a filestream, which fopen provides.
I have a function that uploads a file into a web storage and prior to saving the file on the storage system if the file is a pdf file i would like to determine how many pages a pdf file has.
Currently i have the following:
$pdftext = file_get_contents($path);
$num = preg_match_all("/\/Page\W/", $pdftext, $dummy);
return $num;
Where $path is the temporary path that i use with fopen to open the document
This function works at times but is not reliable. I know theres also this function
exec('/usr/bin/pdfinfo '.$pdf_file.' | awk \'/Pages/ {print $2}\'', $output);
But this requires the file to donwloaded on the server. Any ideas or suggestions to accomplish this?
PHP is a server-side language, meaning all processing happens on your server. There's no way for PHP to determine details of a file on the client side, it has no knowledge of it neither the required access to it.
So the answer to your question as it is now is: It's not possible. But you probably have a goal in mind why you want to check this, sharing this goal might help to get more constructive answers/suggestions.
As Oldskool already explained this is not possible with PHP on the client side. You would have to upload the PDF file to the server and then determine the amount of pages. There are libraries and command line tools that could accomplish this.
In case you don't want to upload the PDF file to the server (which seems to be the case here) you could use the pdf.js library. Now the client is able to determine the amount of pages in a PDF document on its own.
PDFJS.getDocument(data).then(function (doc) {
var numPages = doc.numPages;
}
There are other libraries as well but I'm not certain about their browser support (http://www.electronmedia.in/wp/pdf-page-count-javascript/)
Now you just submit the amount of pages from javascript to your php file that needs this information. In order to achive this you simply use ajax. In case you don't know ajax, just google it there are enough examples out there.
As a side note; Always remember to not trust the client. The client is able to modify the page count and send a completely different one.
For those of you running linux servers this actually is possible. You need the pdfinfo extension installed and using the function
$pages = exec('/usr/bin/pdfinfo '.$pdf_file.' | awk \'/Pages/ {print $2}\'', $output);
outputs the correct page number where $pdf_file is the temporary path on the server upon upload.
The reason it wasnt working for me was because i didnt have the PDFinfo installed.
I'm working on a project where I upload an image (jpg) and manipulate it using the PHP GD library.
I know that I can use GD functions to edit an image resource (created from imagecreatefromjpeg()) but I was wondering if there was a way I could use the file uploaded in the $_FILES array directly with the GD library. One solution I thought of was saving the uploaded file, pushing it into imagecreatefromjpeg, then deleting it afterwards.
This seems cluinky though, is there a more efficient solution?
I'm still a bit new to PHP so I'm not sure as to how files are stored in the $_FILES array. I hope I'm making sense here. Thanks.
You can simply do this:
$img = imagecreatefromjpeg($_FILES['image']['tmp_name']);
// do gd operations on $img
imagejpeg($img, '/path/to/target');
You'll have to use imagecreatefrom in some form or another, and you can use it directly on the uploaded file. Then just save the result of your manipulations using imagejpeg. The uploaded file in tmp_name will we thrown away automatically.
Having said that, you should save the original somewhere. It's always good to have it around for later use.
I am using plupload to do an upload of multiple files to my server. Using this, there is a parameter 'url : 'upload.php'. upload.php catches the files as they are received, and might recombine them if they get chunked. Once the full file is received, it sends a response back to the original page, displaying a green checkbox icon.
I have added some code to this page, after all the main code to manipulate the photos I have uploaded. My plan is to create three copies of my full size image, lg, med, and small. I got this part working, but then decided to first rename the original file to match my naming scheme.
I now get a corrupted renamed file, and thus my three smaller images also get corrupted.
//get the original file info
$filepath = $_SERVER['DOCUMENT_ROOT'].'/uploads/';
$filepathinfo = pathinfo($filepath.$fileName);//fileName is used previously in the file
//rename original file to a unique name
$finding_id = 'xyz';
$file_name_new = uniqid($client_id . '-' . $finding_id . '-', true); //doesn't include extension
//rename($filepath.$fileName, $filepath.$file_name_new.'.'.$ext);
//copy($filepath.$fileName, $filepath.$file_name_new.'.'.$ext);
As is, I get my one file, or how ever many I uploaded, byte size matches original exactly, and name stays the same (except for removal of certain characters).
If I uncomment only the rename function, I actually get two files. The byte sizes total the original photo. The larger file displays with a section of gray at the bottom. The smaller file doesn't display at all.
If I uncomment only the copy function, I get an exact renamed copy of my original file, my original file, and another file, the same size and corruption as the larger file doing a rename.
Any ideas? Seems like it should be pretty straightforward.
if the file was currently uploaded by HTTP POST use move_uploaded_file
if you fopen() somewhere in this request the same file make sure to call fclose()
I forgot I had the chunking feature turned on. Must have turned it on to test something. For whatever reason, when the script was running the last chunk of the file hadn't been fully appended yet. Thanks for all the input anyway!
Are you writing to the file yourself? If so, the problem might be that you're missing a call to fflush or fclose. (The last chunk of the file not getting written and the file no longer being there when PHP gets round to writing it. This shouldn't happen if you're using Linux or some other Unix, but I could envisage it on Windows.)
HI
I have a forum and I'm trying to think of how to do an "attachment" feature.
You know if you make a thread you can chose to upload a file and attach it in the thread.
Should I make a table called attachment with id of the file id in table files?? Whats the best way. And I want you to be able to upload more than 1 attachment. and if it's a picture show a little miniature of the picture.
How should I check if the file exist etc? How would you do this?
Sorry for my poor english
You question is too broad but I'll give you some pointers:
store the images on the disk, something like /uploads/--thread_id--/1.jpg, /uploads/--thread_id--/2.jpg and so on (this way you don't have to make any changes to your DB)
Regarding the upload process, validation and image resizing you can read more at (I recommend you read them in this order):
http://pt.php.net/manual/en/function.exif-imagetype.php -> image validation
http://php.net/manual/en/function.move-uploaded-file.php -> upload process
http://pt.php.net/manual/en/book.image.php -> image resizing & manipulation
Chacha's plan sounds good to me, but you have to be careful. Make sure the files that you save don't have any execution permissions and that the file isn't on a web-accessible directory on your server. I think you should put the upload directory in a directory higher than your web directory for security purposes.
Another possible way to save the files: save their binary code in blobs in the database. I'm not sure if there are any advantages to this method, but I haven't personally had to deal with file uploads.
Above all else, be careful with uploaded data!
I honestly would create a Column on the table of posts that says 'Attachments', and then do a comma delimited string of attachment file names
file1.png,file2.png,file3.png
then when you get it into PHP, simply explode it
$attachments = explode(',', $string);
and check for each file that you have already put in your upload directory:
foreach($attachments as $file)
{
if(!is_file($upload_directory.$file))
{
$error[] = $file . " is not a valid attachment";
// run cleanup script
}
}
To get the attachments, it is really simple code, but you need to validate and sanitize the incoming file.
foreach($_FILES as $array)
{
// Sanitize Here
die("SANITIZE HERE!");
move_uploaded_file($array['tmp_name'], $upload_dir);
}