I have LaTeX code inside PHP (not as .tex file); for example received by $_POST. How can I save the rendered LaTeX as a PNG or PDF file on my server?
EDIT: I know that PHP normally does not do this. I will run a shell command within PHP. Thus, I need something to do so in Linux terminal.
you could exec() pdfTex to generate a PDF
URL: http://www.tug.org/applications/pdftex/
Run command
pdftex file.tex
after you saved your tex-code from $_POST to a file using file_put_contents() - make sure you have the rights to write in the specified folder.
hope that helps!
Related
I am trying to write some batch script to download and save an XLS file from a URL. I am able to down load the file by using
#ECHO OFF
start /d "C:\Program Files\Internet Explorer" IEXPLORE.EXE url link
exit
I would now like to save these files to a folder or directory.
Any help anyone could provide here would be greatly appreciated.
There are at least two ways to do it.
Like Buddy suggested, use a command-line downloader, for example wget.
Under Linux, you can run PHP directly (even without a webserver). See PHP: Command Line PHP on Microsoft Windows in PHP manual.
Don't run a browser, or - even worse - IE, just to run a PHP script.
I am wandering if anybody has a reliable way of determine whether a PDF document is actually a PDF document, and that it isn't corrupted.
I generate reports on my system and I want to be certain that the data returned by another system contains an openable PDF document (and that the data is not corrupt).
At the moment, I am basically looking at string length (the PDF gets stored into a variable, not a physical file).
Any recommendations to do this in PHP would be great.
If you just want to make sure the file is a PDF file, without checking that it is a completely intact pdf file with no issues, you can read the first 5 bytes of the file and for a PDF file they will be exactly equal to the string "%PDF-"
This is how the file program in linux identifies PDF files.
But if you want to make absolutely sure there are no errors anywhere in the file, you can run a program that processes the entire file, and see if that program returns success.
In linux you can use ghostscript ("gs") to render the PDF document to any format.
Or you can install acrobat reader, and run acroread as a command line program to convert it to postscript:
acroread -print -toPostScript [your_file.pdf]
To do either of these you will need to use the system PHP function. To check of the program ran successfully, you need to pass a variable in the second parameter to system that will receive the return status.
You can use pdfinfo, centos installation command:
yum install poppler-utils
... and use pdfinfo command. The PHP code is as follows:
if(!exec("pdfinfo test.pdf")){
echo "file is corrupted"
}
I want to send data to my server via SSH. The data is image files that need to be saved into directories on the server.
If I run the script via SSH how can I get a PHP script to read the image files?
For example, if I used bash I could do
./uploadimage.bash -image.jpg
and that would be that. But my knowledge of PHP is limited. Usually PHP uses the $_FILE array when dealing with files, as far as I know. Do I need to use this if I send the files by SSH?
Run the script via php command line executable:
php myscript.php image.jpg image2.jpg
You can the get the file names via $argv array and deal with them any way you please.
It depends on what you need to do with the images.
Do you just need to echo them out to the user?
echo file_get_contents('image.jpg');
Are you meaning to retrieve the command-line variables passed to the script? Use $argv.
myScript.php image.jpg # image.jpg becomes $argv[1]
Do you need to do processing on the images? Use the GD functions.
$image = imagecreatefromjpeg('image.jpg');
// Do processing
imagejpeg($image); // Pass a filename if you want to save it instead of output it.
If you want to simply upload a bunch of files to a remote server, your best bet is to use scp command, rather than PHP
scp /your/file.png username#host:/remote/path.png
If you execute a PHP script through an SSH Session, there's no way you can send a file through SSH. You have to first copy it to the remote server and then execute the PHP which uses file_get_contents or something like that.
If you are sure that PHP must be the recipient of the file (maybe you want to do some logic to determine the file name, path), you have to host it as a webserver, and you can use curl to upload the file, like this:
curl -k -F myfile=#image.png foo.php.
I'm trying to take a generated html file and convert it to PDF on the fly with PHP.
It's going on my localhost and staying there so for the PDF conversion I'm using a Mac OSX utility, I guess you would call it.
The terminal command being:
/System/Library/Printers/Libraries/convert -f temporary.html -o destination/final.pdf
This works properly via terminal (produces a simple 20kb PDF file); however, when I run it inside PHP via passthru() the file (final.pdf) is created though it is a Zero KB file (corrupt).
The /destination folder is CHMOD 777, temporary.html is CHMOD 755.
Any help would be greatly appreciated.
Edit (Additional Detail):
Now in the error log, amongst the debug lines there is an error of "ERROR: xhtmltopdf (PID 13204) crashed on signal 6!"
I like to share what I do to generate PDF file on the fly. We use UNIX server to host.
I use tcpdf - a php library to convert HTML to PDF file. I use it in my projects and it works very well. TCPDF supports css, javascript, forms, images and lot more.
Website: http://www.tcpdf.org/
Demos: http://www.tcpdf.org/examples.php
When I need convert HTML in PDF I use this very nice software: http://www.princexml.com
You could have a look, it's free for personal use.
As I can't write file on the GAE server, is there a way that I can directly run PHP code in memory without the help of a php file.
BTW, I was using Quercus to run PHP in GAE.
You can refer to the link: http://www.webdigi.co.uk/blog/2009/run-php-on-the-google-app-engine/
Thank you so much.
You can use eval() from PHP to execute a string of PHP code without saving it to a file.
For example:
eval('echo hi;'); // this echoes "hi"
You can upload the file, you just can't create one using code
So you can upload the PHP files you want with the Quercus stuff, and access the files, but the Python/PHP/Java code being run on the server cannot create files
I don't really see why you want to use a dynamic PHP file...