I am trying to capture my current window using ImageMagick using PHP script, but got error as response. I did searched for it in stackoverflow, but none of them solved my issue. I did installed imagemagick in my machine Ubuntu 14.04 . Following command gives me proper output.
import -window root screenshot.jpg
I have this in image.php
<?php
exec( "/usr/bin/convert rose: -resize 200x200 output.jpg");
exec( "/usr/bin/import -window root screenshot.jpg");
?>
<img src="output.jpg"/>
I have executed this from terminal
php image.php
And i got desired response(screen got captured and a file got created name screenshot.jpg)
Then i tried to access this above php script using my browser, The convert command works fine but for import comamnd nothing happens, i tried checking my apache log and it gives me following error
import: unable to open X server `' # error/import.c/ImportImageCommand/368.
What am i missing here?
Is it a permission issue?
If you are trying to do this only for tests and/or studies:
1 - Check if the apache user can run the commands
/usr/bin/convert rose: -resize 200x200 output.jpg
/usr/bin/import -window root screenshot.jpg
2 - Check if you have X11 installed and configured, set the display env var. DISPLAY=:0 for example
3 - Adjust the command import
/usr/bin/import -window root
to /usr/bin/import -window apache_user
or /usr/bin/import -window your_user
If you are trying to create a website that will be accessed by multiple clients with different operational systems, your code will not work. You will need to do that using only PHP code because, obviously, the windows machine does not have the convert and the import commands.
You can read here some how to's
Related
I have a C program that I wrote called convert3to5, originally written for CentOS / Fedora 32bit system in early 2010. I am moving it to new CentOS 6.x 64bit system host.
From a CentOS Putty console I can run the convert3to5 command just fine; here is a sample of it running from my console:
[root#cloud convert3to5]# ls
CircleStar convert3to5 Convert3To5.txt test.tif
[root#cloud convert3to5]# ./convert3to5 /var/www/webadmin/data/www/mydomain.com/uploads/SV-DIS160217B.tif
TIFFReadDirectory: Warning, /var/www/webadmin/data/www/mydomain.com/uploads/SV-DIS160217B.tif: wrong data type 7 for "RichTIFFIPTC"; tag ignored. Image has an undefined fillorder - using default: MSB2LSB
The above is a normal completion of convert3to5 and I get a SV-DIS160217B.bmp that is placed in /var/www/webadmin/data/www/mydomain.com/uploads/ So running it from console works fine.
Question - I am attempting to run the same exact command from PHP using the exec(command, output, return) command as follows:
chdir($sv_path.$c3to5_path); //change our working directory to "/convert3to5" directory
$command = "./convert3to5 $targetFile 2>&1";
$result = exec($command, $output, $return);
// the output of the above command - is a .bmp file it will be placed in the same path as the input .tif file
I get the following $result:
ERROR: Unable to convert
/var/www/webadmin/data/www/mydomain.com/uploads/SV-DIS160217B.tif to 5
color BMP file: Open file Error: Tiff_3_to_BMP_5_.lut!
My convert3to5 does need to open Tiff_3_to_BMP_5_.lut
Why does it find Tiff_3_to_BMP_5_.lut when I run convert3to5 from a console prompt but not from PHP exec(...) in both cases my pwd shows that I am in
[root#cloud convert3to5]# pwd
/var/www/webadmin/data/www/mydomain.com/myView/convert3to5
I have also verified pwd is correct from my PHP script after the
chdir($sv_path.$c3to5_path);
Tiff_3_to_BMP_5_.lut is in CircleStar directory - the path to CircleStar is /var/www/webadmin/data/www/mydomain.com/myView/convert3to5/CircleStar
Summary: ./convert3to5 works while PHP exec('convert3to5 ..) does not appear to work.
Can anyone suggest the difference and how to fix and/or debug?
Thanks
You're running the console from the convert3to5 directory, and I suspect your old C program used a relative path to the .lut file, possible relative to the .tif?
What if in the console example you did
cd ../..
./path/to/convert3to5/convert3to5 /var/www/webadmin/data/www/mydomain.com/uploads/SV-DIS160217B.tif
Might be related to $targetFile. Print that and see if it's the full path.
Finally, run
/full/path/to/convert3to5 fullTargetPath
If that works, then as a workaround, if you just do exec('/full/path/to/convert3to5 $fullTargetPath, ..) it should behave like the console.
Per my above comment to wonton:
From the console I was running as root (so fully privileged). I supposed my PHP script will run as the "apache" user on the server?
Here was the problem I believe: I looked at the CircleStar directory privileges where the Tiff_3_to_BMP_5_.lut file exists. CircleStar had rw-r--r-- (0644) when running as root from console this allowed my convert3to5 program to find and open Tiff_3_to_BMP_5_.lut file just fine. However not the PHP exec(...) once I changed the privilege on CircleStar to rwxr-xr-x (0755) PHP exec(...) ran fine!
So ultimately it was a permission issue.
I'm in trouble and that much confused about a php shell_exec command.
When the command is execute by PHP I have no error but the execution fails. If I use exactly the same command from a terminal it works.
Here's the command :
/usr/bin/wkhtmltopdf --lowquality --dpi 300 --encoding utf-8 "/tmp/knplabs_snappyxa9otq.html" "/tmp/knplabs_snappyv3pD7h.pdf"
When I lauch this from a terminal :
$ /usr/bin/wkhtmltopdf --lowquality --dpi 300 --encoding utf-8 "/tmp/knplabs_snappyWG9XTd.html" "/tmp/knplabs_snappyv3pD7h.pdf"
Loading page (1/2)
Printing pages (2/2)
Done
But from my php script :
// Construct the previous command
$command = $this->buildCommand($url, $path);
../..
shell_exec($command);
../..
$content = file_get_contents($path);
../..
I've test the output of shell_exec, it's empty.
The log :
Warning: file_get_contents(/tmp/knplabs_snappyv3pD7h.pdf): failed to open stream: No such file or directory in /*****/lib/snappy/SnappyMedia.class.php on line 64
No permission pb in the /tmp directory :
$ ls -la /tmp
total 448
drwxrwxrwt 16 root root 4096 mars 12 21:51 .
../..
I've tried avec the PHP exec() function to get error informations, I just get an "1" error code in return_var and nothing in output.
For information this issue appear on my test server, my desktop computer but not on my notebook. All the 3 are with sames PHP, Apache, Mysql versions.
I don't understand anything ...
Thanks for any help, I'm loosing my mind.
David.
I've found the solution here : Executing wkhtmltopdf from PHP fails
Thanks to Krzychu.
First to get information from the shell_exec command add " 2>&1" at the end of the command. In that way you will get information in return of the command :
$no_output = shell_exec($command);
echo $no_output; // nothing
$output = shell_exec($command . ' 2>&1');
echo $output; // in my case : "cannot connect to X server"
The solution :
Not use the wkhtmltopdf ubuntu package (0.9.9-4)
Use the official package from the Wkhtmltopdf download page
So no need to install xvfb ! (I've seen this advice many times)
Looks like a user's permissions issue.
When you run the command from the terminal, it is the user account, currently used, which does have the right permissions, to run a command in /usr/bin, and execute the specific file.
When you run it from the php script, it is the http server account on your system, which needs the permission to execute the file in /usr/bin. Usually this is the apache user.
How you should setup permissions depends on your system. Just remember that what is allowed for apache, is allowed for anyone accessing your http server.
I have had this problem for ages and adding . ' 2>&1' after the $command has somehow solved the problem.
this:
$output = shell_exec($command . ' 2>&1');
instead of:
$output = shell_exec($command);
No idea why but it works and I'm grateful.
Is it a shared hosting? It seems like shell_exec is a restricted function. Try running error_reporting(E_ALL); ini_set('display_errors', 1); before calling shell_exec.
I stumbled upon the same Problem, in my case an absolut Path in the exec Command like /var/www did not work, I had to use relative Paths from the point where I executed the php File.
I also wanted to notice, that it did not work using shell_exec, however it worked using normal exec command, not sure wheres the difference here.
I am trying to convert .docx file to .html using php shell_exec in CentOS 6.5
My php code:
$command = "libreoffice --headless -convert-to html resume.docx 2>&1";
$result = shell_exec($command);
echo $result;
When I run the index.php at http://localhost/converter/ it gives me:
javaldx: Could not find a Java Runtime Environment! Warning: failed to read path from javaldx /usr/lib64/libreoffice/program/soffice.bin X11 error: Can't open display: Set DISPLAY environment variable, use -display option or check permissions of your X-Server (See "man X" resp. "man xhost" for details)`
while in terminal it is working perfectly:
cd /var/www/html/converter/
libreoffice --healdess -convert-to html resume.docx
here it creates resume.html in my /var/www/html/converter/.
Hi i have the same problem, i want to convert PDF's from DOCS created with PHP, i'm using OpenSuse 12.3 with LibreOffice, tried many things, finally i detect that the error is in folder:
1.- First check that you don't have disabled shell_exec in php.ini, and open_basedir don't restrict your access folders.
2.- Run the command as a simple user in shell (terminal)
export HOME=/tmp && soffice --headless --convert-to pdf --outdir /srv/www/htdocs/ /srv/www/htdocs/Creecimientos/sic/app/webroot/usuarios/2/8_Pagare_CreePersonas.docx
3.- If it works, you only have to put the correct folders in your code, when i run this code in PHP, it show me a blank page, so i check the access_log of apache for any hint:
[Java framework] Error in function createSettingsDocument (elements.cxx).
javaldx failed!
Warning: failed to read path from javaldx
terminate called after throwing an instance of 'com::sun::star::uno::RuntimeException'
Note: my error was in using export HOME=/tmp, i checked that the folder in root system has 777 for tmp, but the problem was that apache don't acces to it, maybe search for a relative folder of the script, but after test many things i only put a folder with permissons for wwwrun HOME=/srv/www/htdocs/folder_with_777
This is my final code, that works..
<?php
function word2pdf()
{
echo "Procesando";
$result = shell_exec('export HOME=/srv/www/htdocs/Creecimientos/sic/ && soffice --headless --convert-to pdf --outdir /srv/www/htdocs/Creecimientos/sic/ /srv/www/htdocs/Creecimientos/sic/app/webroot/usuarios/2/8_Pagare_CreePersonas.docx');
echo $result;
}
word2pdf();
?>
In fact, it prints: convert srv/www/htdocs/Creecimientos/sic/app/webroot/usuarios/2/8_Pagare_CreePersonas.docx -> /srv/www/htdocs/Creecimientos/sic//8_Pagare_CreePersonas.pdf using writer_pdf_Export, after succes.
I made other changes before in desesperate mode, but none of them solved the problem, tried to change owner to soffice wich found it witch $ ls -l $(which libreoffice), tried with 777, etc..
/* This command will work on centos 6 /7 with installation of libreoffice headless package */
First install package on centos as :
yum install libreoffice-headless
/* following code work to extract text format from */
<?php
$result = exec("export HOME=/tmp/ && /usr/bin/libreoffice --headless --convert-to txt:Text --outdir /tmp filePath");
var_dump($result);
?>
Most likely the user that LibreOffice is ran as, does not have a writeable home directory so LibreOffice fails to create it's config directory and then it cannot create it's config files and then fails to load Java, because it cannot write the default config. A bit silly I know.
Try adding this parameter: -env:UserInstallation=file:///tmp/whateverhere
I don't have enough reputation to comment on TD_Nijboer's answer, but the answer to his specific problem appears to be that soffice needs to be able to read & write config information somewhere. The first place it tries to do this is the libreoffice directory in ~/.config ('~' means "the current user's home directory").
In Debian, by default, the www-data user has the home directory /var/www, and does not have write permission there.
If you make sure it has permission to either create ~/.config itself, or libreoffice within an existing ~/.config, I expect it will work.
2 things, 1st the command is soffice --headless,
2nd i have an similar javaldx error and it has to do with permission.
when executing as root it works fine, but php executes as www-data.
if anybody knows a good way to execute libreoffice from php please let me know.
as i'm getting an error code 77 saying:
[Java framework] Error in function createSettingsDocument (elements.cxx).
javaldx failed!
Warning: failed to read path from javaldx
I am trying to execute a simple ImageMagick convert command from a php script, i can convert the same files and achieve the results via command prompt but in php i am unable to execute the same command by any means , the code is :
exec('convert -density 350 '.__DIR__ . DIRECTORY_SEPARATOR .'test.pdf '. __DIR__ . DIRECTORY_SEPARATOR . 'image.png');
and this error is thrown by php
convert.exe: no decode delegate for this image format
'C:\XAMPP\htdocs\test.pdf' # error/constitute.c/ReadImage/532.
convert.exe: missing an image filename 'C:\XAMPP\htdocs\image.png' #
error/convert.c/ConvertImageCommand/3016.
With same configuration on a Windows 7 x64 i can execute and achieve the result, but on windows 2008 R2 i am unable, what could be the cause for this?
Ok, so solution was quite simple and straightforward, you just need to make sure that the permissions on C:\Windows\Temp and to that of Imagick "CONVERT.EXE" folder are set to "EVERYONE -> ALL" So , group everyone has permissions of doing what soever with the convert and Temp folder.
Hope it helps.
I'm trying to add SVG to .png conversion into my Yii app, using the Batik rasterizing library. Currently I'm working locally on a Mac running OSX 10.6.7, PHP 5.3.4 and Java 1.6.0_24.
When I run the PHP script that deals with the conversion, using...
$output = shell_exec(java -jar batik/batik-rasterizer.jar -m image/png -d pdf_temp/file.png -w 800 pdf_temp/file.svg)
Batik fails with the (unhelpful) error:
About to transcode 1 SVG file(s)
Converting file.svg to pdf_temp/file.png ... file_1310581599.png
Error while converting SVG
However, using...
java -jar batik/batik-rasterizer.jar -m image/png -d pdf_temp/file.png -w 800 pdf_temp/file.svg
...in Terminal works a treat and saves the .png file in the /pdf_temp/ directory along with its original .svg
So what's different about the PHP/apache environment that's causing Batik to fail when Terminal is fine?
EDIT:
After chatting with some colleagues we think it could be the fact that Java needs to run as root - which it does from Terminal but not within the web server.
Adding...
2>&1 1> /dev/null
To my Batik shell_exec() command reveals the following error:
Exception in thread "main" java.lang.InternalError: Can't connect to window server - not enough permissions.
Any ideas as to how I can run Java as root with the web server environment? Or allow it to perform the functions I require?
-Djava.awt.headless=true
http://www.emcken.dk/weblog/archives/25-svg-rasterizer-with-batik.html
I am currently working with Batik and Yii as well. Check the output and the source files' path. I provided the whole path and it is working now. It seems that Yii doesn't stand where your view is, instead Yii current location is your webroot. In my case I fixed like this:
define ('BATIK_PATH', '/var/www/wattquotes/protected/views/calculator/reports/batik/batik-rasterizer.jar');
$typeString = ' -m image/jpeg';
$outfile = ' /var/www/wattquotes/protected/views/calculator/reports/batik/temp/pic.jpg';
$width = ' -w 600';
$tempName = ' /var/www/wattquotes/protected/views/calculator/reports/batik/temp/proposal.svg';
$output = shell_exec("java -jar ". BATIK_PATH ." $typeString -d $outfile $width $tempName");
It works!