I have a PHP Script in which it executes a batch(.bat) file using passthru() function. The output of batch file is printed via using echo statement.
This PHP Script works absolutely fine when hosted on Apache webserver, however the same PHP script produces 500.0 error on every alternate call, when hosted on IIS 7.5
I did some research and found out that if PHP script takes long time to execute, the browser gets unresponsive.
Hence, I edited the PHP script to write into a file like "Before executing batch file" and "After executing batch file".
As there 500.0 error was displayed, the file was still getting updated by above lines. This concludes that while the script is getting executed but browser is displaying 500.0
Is there any settings that can be tweaked in IIS?
This problem occurs only for IIS 7.5. When I use Apache it works like a charm.
I've had the exact same problem as you; executing a batch file via exec(), shell_exec(), etc, would result in an internal 500 server error every other time I refreshed the page.
I resolved this by removing all PAUSE commands from the batch file.
Make sure you don't have any breaks in the flow of the batch file. That is, if user input is required at any point during the execution of the batch script php will hang and the server will time out.
Hope this helps!
(I'd comment but I don't have 50 reputation)
Related
I have an 80M zip file that I am uploading to 'ShareFile' through their REST API using PHP cURL. The script works fine when run via the browser or on my local Windows machine using the php7 CLI. However when I attempt to run the script via a cron job on our client's shared hosting using /usr/local/bin/ea-php71, the file and script suddenly stop running mid-upload.
I have set my email address to be notified of any and all cron output.
I have a set_error_handler error handler that echoes any received errors and attempts to log them to a file (this never gets called).
I have a register_shutdown_function that also never gets called.
Finally, I have a curl_setopt CURLOPT_PROGRESSFUNCTION callback to see what is happening with the upload - it writes the total upload bytes $uploadTotal and the current upload bytes $uploadCurrent to a log along with a timestamp.
(Edit) - Forgot to mention I've also got the verbose setting enabled CURLOPT_VERBOSE and am outputting stderr to a log file - but nothing relevant is displayed.
Number 4 has given me the most insight into the issue - when the script is run as a cron job the upload stops around:
upload progress: [UploadTotal: 87455948] [UploadCurrent: 34913772]
every time (roughly around 67 seconds).
Some final details ...
When uploading the 80MB file through cron - my error handler and shutdown function never get called, nor does the cron email from any echoed data. The script just seems to simply PAUSE forever (it's almost like the script is waiting for user input or something).
However:
If I run the script locally or change the upload file to a 5MB file - everything works as normal - all functions get called and I receive an email notifying that the script has finished running.
It looks to me like I'm hitting some kind of timeout through cron which, per everything I've read should not be the case. I'm looking for some ideas for what I could be running into or how to troubleshoot this one.
Thank you!
I have a Windows Server 2016 VPS with Plesk and PHP 7.1x.
I am trying to execute a simple AutoHotKey script from PHP using the following command:
<?php shell_exec('start /B "C:\Program Files\AutoHotkey\AutoHotkey.exe" C:\inetpub\vhosts\mydomain.com\App_Data\myahkscript.ahk'); ?>
This is the only line on the page. I have tried different ahk scripts, the current one simply creates a MsgBox.
When I execute my php page, on VPS Task Manager I see three processes created with the expected USR: cmd.exe, conhost.exe and php-cgi.exe. However, my PHP page just sits waiting on the server and nothing actually happens on the server.
I have also tried the same line except replacing shell_exec with exec. This seems to make no difference. I have tried without start /b with both commands. In that case the PHP page completes but no new processes are started.
I cannot find any errors in any logs: Mod_Security, Plesk Firewall, IIS.
Any ideas?
EDIT:
I tried my command from the VPS command prompt and immediately slapped in the face with the obvious issue of the space in 'Program Files'. I quoted the string as shown above and the command works. This eliminated the hang when running from PHP. However, the command still does nothing when executed from the web page.
EDIT:
Based on suggestions from the referenced post 'debugging exec()':
var_dump: string(0)""
$output: Array()
$return_val: 1
One point was that I would probably not be able to invoke GUI applications. That puts a damper on the idea.
I'm building a website for my office work which loads dynamically tables from an long PHP script. To do that, I've created a PHP file that handle AJAX and Get request (echo JSON from long PHP script).
When i use my code in local machine with a WAMP server all works good, of course I had to add this line ini_set('max_execution_time', 5000); to avoid the issue of timeout.
My problem is when i put my project on real Virtual Machine with FreeBSD environment that doesn't work, i mean after 600 sec the server kill my request (Fatal error: Uncaught exception 'HttpException' with message 'An error occurred : [503]).
But I note that if I run the PHP file directly from the console in command line all works good and the script echo my JSON request.
The detail of the script is essentially from for each and ended by echo JSON of processing loops.
So my question is how i can manage it ?
I was thinking about do something like that :
call the file script.php from ajax in command line
split the file script.php to avoid the timeout
Below, here is a scheme of the current process :
I wrote a simple PHP code to execute a console program:
<?php
$cmd = escapeshellcmd('progName.exe arg1 arg2 arg3');
exec($cmd);
?>
If I run the command on the console directly on the server, it works. However, when I run the PHP on the browser, it doesn't work. The process progName.exe is running (checked using Task Manager on the server), but it never finishes. This program is supposed to compute some parameters from the arguments and write the result to a binary file, and also produce a .WAV file. Here is the error message I get on the browser:
Error Summary
HTTP Error 500.0 - Internal Server Error
C:\php\php-cgi.exe - The FastCGI process exceeded configured activity timeout
Detailed Error Information
Module FastCgiModule
Notification ExecuteRequestHandler
Handler PHP
Error Code 0x80070102
Then I wrote a simple console program that write a sentence to a text file (writeTxt.exe hello.txt). Using the same PHP script, I ran it on the browser and it works.
I already tried to increase the timeout on the server, but still have the same error.
What could cause this problem?
When you execute a program in PHP using the exec function (e.g. exec('dir')), PHP waits until it is ended or you sent it to the background and PHP comes back directly (see documentation, especially the comments).
According to your posted PHP sources ($cmd = escapeshellcmd('progName.exe arg1 arg2 arg3');) the program is not sent to background by PHP - so what stays is that progName.exe...
...sends itself or a fork to the background (unlikely, but look into the sources of progName.exe)
...is waiting for input (<-- this is my favorite)
I missed something ;-)
As I said I bet it is the second option. Hope that helped a bit.
I have a PHP script that calls a .bat file using system(). The output is written to the screen and I derive some values from parsing this output. This is running on windows 2003 IIS server. PHP v5.2.0
Specifically I am using this script to launch an Amazon EC2 instance and assign an IP address to it. It has worked great for me so far but recently the problem started.
Here is the code
$resultBatTemp = system("cmd /C C:\Inetpub\ec2\my_batch_file_to_launch_instance.bat");
$resultBat = (string)$resultBatTemp;
$instanceId = substr($resultBat, 9, 10);
...
Once I have this instace Id I can run another batch file that calls associates an ip address with this instance. It would appear that the instance does get launched but I never get the output on the screen.
For some reason this has all stopped working, the page freezes and never refreshes. I also need to completely exit safari or mozilla otherwise all pages from the website fail to load. Only when I relaunch the browser can i view the website again. I've connected to the webserver that hosts these scripts and checked PHP error log but nothing shows there. I've opened a DOS prompt and entered the code from the bat file that way and it connects to amazon and launches the instance fine. Ive isolated this bit of code and removed the system command and the rest of the script runs fine, so it appears that the hold up is with outputting the results of the bat file.
Recently I have purchased a new domain name for the site so this script is running from this domain. Might this cause the problem?
thanks
------------------------------------------------UPDATE-----------------------------------------------
Well hope this helps someone, I didnt find out what was wrong but created a new PHP file with a simple system command that called a .bat file, and a non-existent .bat file expecting to get an error back but nothing - just the usual hang for ages. So I restarted IIS and this fixed the problem. Dont know what was wrong but that did the trick.
Maybe first check what the system() call returns. According to documentation it will return FALSE in case of failure. Also, including your my_batch_file_to_launch_instance.bat in the question might help in solving it.
Try using the passthru function
Also make sure that all your commands are safe use escapeshellarg() or escapeshellcmd() to ensure that users cannot trick the system into executing arbitrary commands.