CODEWITHSUNDEEP
phplinuxshellexec
Agnia From hell
Agnia From hell

Reputation: 11

How i can run function exec in PHP

I can't add * to my code to find file

this code work

exec("mediaconvert -t wav -i /home/20220228/11/23401.rec -o /var/www/html/test.mp3");

if i add a the *, it don't work

exec("mediaconvert -t wav -i /home/20220228/11/*01.rec -o /var/www/html/test.mp3");

p.s. in path is only one file, when i try execute this code from shell it work. Pls help me)

Upvotes: 0

Views: 569

Answers (3)

Markus AO
Markus AO

Reputation: 4889

Filename expansion and other bash-specific features may/will not work in other shells (e.g. standard POSIX). If your command with * is not executed in bash/compatible, it won't work as expected. You need to verify the environment/shell that your PHP installation executes commands in.

Run the following test script:

<?php
exec('echo "$SHELL"', $out); 
var_dump($out);

When I run the PHP script directly on CLI, I get "/bin/bash" for the shell that's called. When I run it via browser, curiously I get "/sbin/nologin" instead. There are different environments for user apache that executes PHP via browser calls, and the "actual" user logging in via SSH. Bash shell is not available for the Apache user by default.

These results are from a Centos7 server with Apache 2.4/PHP 8.1.4 running. Your mileage may vary. Bottom line: if the command you are executing depends on bash-specific features, it must execute in a bash environment, or another shell that supports the required features.

If bash is not available, your other option is using e.g. glob to get files matching the pattern in your directory, and then loop over them while executing the command for each specific file.

Edit: As pointed out by @Sammitch (see comments), /sbin/nologin is a common "shell name" choice for non-login users, and most likely uses /bin/sh. This should still allow for filename expansion/globbing. Testing browser script call with exec('ls *.php', $out); the wildcard functions as expected.

You may find this question/answer relevant: Use php exec to launch a linux command with brace expansion.

Upvotes: 1

Dori Rina
Dori Rina

Reputation: 409

You can try to find files with glob() function and after that you can use exec(). You can try a similiar solution with the following code:

$input_files = '/home/20220228/11/*01.rec';
foreach (glob($input_files) as $filename) {
    exec("mediaconvert -t wav -i " . $filename . " -o /var/www/html/test.mp3");
}

Upvotes: 0

Mateus Gabi
Mateus Gabi

Reputation: 99

I recommend you do the opposite. First, get the files you want to input then you exec. For instance:

$input_files = ...
exec("mediaconvert -t wav -i " . $input_files . " -o /var/www/html/test.mp3");

Upvotes: 0

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