PHP Exec() Will Not Execute Shell Command When Executed via Browser

PHP exec() will not execute shell command when executed via browser

Add 2>&1 to the end of your command to redirect errors from stderr to stdout. This should make it clear what's going wrong.

PHP exec/shell_exec/system not working through browser

try

$output = shell_exec('ls /tmp/ 2>&1')

you might be having an issue with permissions to current directory for the user running the web page.

you can also try whoami command.

shell_exec does not execute from browser requests

Your webserver runs as a specific user and needs the path to php.exe as there is no path environment variable for the webserver user:

shell_exec("c:\path\to\php " . __DIR__ . "/test.php");

PHP. Different encoding when calling shell_exec from command line and browser

The PHP CLI environment is not the same as the shell_exec one. There are two possibilities for how to manage to get your content to return in the proper manner.

The easiest way is to just reset the environment by calling env -i in the shell_exec call.

<?php
  $cmd_desformat = "env -i /usr/local/bin/process /tmp/input.txt > /tmp/output.txt";
  shell_exec($cmd_desformat);

This may not work if the default environment is not correctly set up. If that is the case, then you may need to set it up explicitly using putenv().

<?php
  putenv('LANG=en_US.UTF-8'); // Set this to the language you need
  $cmd_desformat = "/usr/local/bin/process /tmp/input.txt > /tmp/output.txt";
  shell_exec($cmd_desformat);

---

Related Topics