i have been making a text writer where u can create a file and then u can also store it into a folder of d web server, like wase a cloud computing system.
but i have a prob that how to save the file when the menu is clicked. i am trying it with exec() function of php, to run a scritp but not getting how to invoke the script on click event. plz hepl out, ur input will be highly appriciated.
and also is there option to open a saved file on click into the text writer dynamically.
thanks!!
Why can't you just save it with fwrite() function?
I mean, it's a usual method of saving files – fopen() it for writing, fwrite() data and finally fclose() the file. You either use general approach or tell us more about your specific needs.
If you still need to run unix/linux commands from PHP, the option to debug what's happening is to log in to command line as a user PHP is running under – e.g. www-data or nobody. You can find it out by running this in your script (see the backtick execution operator):
print `whoami`;
Related
$output = shell_exec('echo "php '.$realFile.'" | at '.$targTime.' '.$targDate.' 2>&1');
print $output;
Can someone please help me figure out why the above line isn't doing what it's supposed to be doing? The idea is for it to create an 'at' job that will execute a php script. If I switch to the user apache(which will ideally control the at function when the php file is complete) I can run
echo "php $realFile.php" | at 00:00 05/30/17
and it'll do EXACTLY what I want. The problem is in the above snippet from my php file it will not create the at job correctly. when I do a at -c job# on both of them the job made from my file is about a 3rd the length missing the User info and everything. It basically starts at PATH= and goes down. Doesn't include HOSTNAME=, SHELL=, SSH_CLIENT=, SSH_TTY=, USER=. I assume it needs most of this info to run correctly. The end output (below)is always the same though it just doesn't have any of the top part for some reason. Let me know if you need more info. I didn't want to paste all of my code here as it contains job specific information.
${SHELL:-/bin/sh} << 'marcinDELIMITER0e4bb3e8'
php "$realFile".php
marcinDELIMITER0e4bb3e8
It doesn't seem to be a permission issue because I can su to apache and run the exact command needed. The folder the files are located in are also owned by apache. I've also resulted to giving each file I try to run 777 or 755 permissions through chmod so I don't think that's the issue.
I figured out a coupe ways around it a while back. The way I'm using right now is an ssh2 connect to my own server as root and creating it that way. No compromise as you have to enter the password manually each time. Really bad work around. The main issue is that apache doesn't have the correct permissions to do everything needed for the AT job so someone figuring that out would be awesome. Another option I found on a random webpage would be to use sudo through the php script, but basically the same minus having to reconnect to your own server. Any other options would be appreciated.
Reading the manual and logs would be a good place to start. In particular:
The value of the SHELL environment variable at the time of at invocation will determine which shell is used to execute the at job commands. If SHELL is unset when at is invoked, the user’s login shell will be used; otherwise, if SHELL is set when at is invoked, it must contain the path of a shell interpreter executable that will be used to run the commands at the specified time.
Other things to check are that the user is included in at.allow, SELinux is disabled and the webserver is not running chrrot.
I am running a local WAMP on my Windows 7 with a PHP script that executes a windows command as follows:
`exec('"%CD%\files_for_redistribution\ppt2html5.exe" /i:"%CD%\test.ppt" /o:"%CD%\output.html" /title:title /desc:description /author:author /keywords:keywords',$output,$error);`
The command when run from a batch file does the job well but when run from PHP script, gives an error:Presentation opening error: PowerPoint could not open the file.
The intention of the command is to convert PowerPoint to HTML using a third party software called ppt2html5.exe where test.ppt has to be converted to output.html.
I have found lot of blogs discussing about exec function not working properly but nothing really helped me to deal with this error as it runs the command but cannot open the file.
It would be great if somebody could help me with this.
Check if safe mode is on, because that activates escapeshellcmd and some characters are escaped.
Assuming that the string that you are passing to exec(), including percentage signs, routes and parameters are right, your problem may be related to permission of files and user executing apache + php, check that.
Fixed by adding a folder named Desktop inside C:\Windows\System32\config\systemprofile.
Source:http://www.sitepoint.com/forums/showthread.php?956457-Windows-2008-PHP-new-COM%28powerpoint-application%29
I have a command line PHP script that runs constantly (infinite loop) on my server in a 'screen' session. The PHP script outputs various lines of data using echo.
What I would like to do is create a PHP web script to interface the command line script so that I can view the echo output without having to SSH into the server.
I had considered writing/piping all of the echo statements to a text file, and then having the web script read the text file. The problem here is that the text file will grow to several megabytes in the space of only a few minutes.
Does anyone know of a more elegant solution?
I think expect_popen will work for you, if you have it available.
Another option is to used named pipes - no disk usage, the reading end has output available as it comes.
The CLI script can write to a file like so:
file_put_contents( '/var/log/cli-log-'.date('YmdHi').'.log', $data );
Thereby a new log file being created every minute to keep the file size down. You can then clean up the directory at that point, deleting previous log files or moving them or whatever you want to do.
Then the web script can read from the current log file like so:
$log = file_get_contents( '/var/log/cli-log-'.date('YmdHi').'.log' );
As Elias Van Ootegem suggested, I would definitely recommend a cron instead of an constantly running script.
If you want to view the data from a web script you can do a few things....one is write the data to a log file or a database so you can pull it out later....I would consider limiting what you output if you there is so much data (if that is a possiblity).
I have a lot of crons email me data, not sure if that would work for you but I figured I would mention it.
The most elegant suggestion I can think of is to run the commands using exec in a web script which will directly output to the browse if you use : http://php.net/manual/en/function.flush.php
I have tried calling a windows program several ways and I have gotten the same result each time.
The program opens up on my machine (without a GUI) but never closes each means that the browser is forever loading.
Though when executing the query string manually through the command line prompt the program closes. Not only that, but the program doesn't actually execute
(it is just launched i.e. there aren't any results).
I just want to know the proper way of starting a program with switches through PHP.
Here is the query string that works (closes the program after executing):
"C:\Program Files (x86)\Softinterface, Inc\Convert PowerPoint\ConvertPPT.exe" /S
"C:\Users\Farzad\Desktop\upload\test.ppt" /T "C:\Users\Farzad\Desktop\upload\test.png" /C 18
If the program never closes, then PHP can't return a value from exec(). The program must close. Chances are there is a problem accessing your files on your desktop in this manner. It will be executed with whatever permissions the webserver has defined.
http://php.net/manual/en/function.exec.php
You might consider the advanced functionality of proc_open(). It will give you access to all the necessary pipes, but I don't think that will help you in this situation.
If the target directory on your Windows machine is C:\Program Files (x86)\Softinterface, Inc\Convert PowerPoint\ConvertPPT.exe, you need to double-quote the directories that have space character within them.
To translate it into php terms, it should be like this:
$directory = 'C:\"Program Files (x86)"\"Softinterface, Inc"\"Convert PowerPoint"\ConvertPPT.exe';
$command = $directory . ' enter your arguments here';
exec($command, $output, $return_var);
// if $return_var == 0, you hit the jackpot.
The physical directory where your Windows desktop is stored belongs to your user profile folder. That means that other users (including the one Apache runs as, which is typical "Local System") won't have the appropriate permissions to read and write files on it. While you can adjust your Apache set-up to make it run with your own user, Farzad, it's more common to put web applications in an entirely different directory tree. It may happen that ConvertPPT.exe just stalls because it's trying to write a file at a location where it's not allowed. I suggest you create a top folder directory and make sure it's world-writeable (once finished, you can tighten these permissions if you like).
Once you discard (or confirm) that the issue is caused by lack of appropriate credentials, make sure you are escaping your command and arguments properly. See this link:
http://es2.php.net/manual/en/function.exec.php#101579
One more thing you can try is to close PHP sessions before issuing the call to exec():
http://es2.php.net/manual/en/function.exec.php#99781
You have probably run into this bug: http://bugs.php.net/bug.php?id=44994
which has been bothering me for ages, even today, on PHP 5.3.5.
It seems like there is some kind of deadlock between the error output of the program and the apache error log file handle into which the program is redirected to write its stderr output, making the program be stuck for ever until the apache processes are killed.
Also, when using passthru, or system, or the backtick operator, there's an intermediary "cmd.exe" process that is used to run the program in an invisible console, and I have seen this cmd process getting stuck without even running the program.
I don't really have a solution as of now, and it seems the bug, even though reproduced by many people, hasn't been resolved.
Let's say I have a local webpage, that when a button is pressed, executes a program in C. I already can do that. The problem is that this program outputs logs and needs input from the user. My question is: how can I display bash-like window and run this program through it, so that output and input is seen through the screen?
Perhaps you could use ajaxterm, and specify the program that you want to run as the shell:
ajaxterm.py --command=/your/command --port=yourfavoriteport
You could redirect the user to the specified port, or display the terminal via an iframe.
I develop plugin for jquery "Terminal Emulator" you can check this out. If you write your C program as JSON-RPC you can create your terminal with one line of javascript.
The other solution is to not use PHP at all, and creating your code as CGI written in C or even in Bash.
Update: You can modify your program to be CGI script
int main() {
printf("Content-Type: text/plain\n\n");
// code of your program here
}
and put it in cgi-bin directory and run it through browser http://yourserver.com/cgi-bin/program it display the output in browser