CODEWITHSUNDEEP
phplinuxbashbuttonexec
nicedreams
nicedreams

Reputation: 1

html form button run command php exec

I'm trying to learn how to change some debian system settings using html and php. I have a few bash scripts that do things for me and I want to do them through a web app.

Right now I'm trying to figure out how to change the SSID name in a file called /etc/hostapd/hostapd.conf.

Change SSID Name: _____Enter New SSID_____ [Button]

Once someone typed in the new SSID name and hit the button then I would have php exec a bash script or just a SED command to replace the text in the /etc/hostapd/hostapd.conf and then display if it was successful or not. I'm assuming I would use functions and if/then/else. I've made some decent bash scripts to automate certain things and want to dive into web. I know and understand HTML really well, and PHP doesn't seem too hard to figure out.

How can I accomplish something like this?

I've tried making a button without user input, but can't get that to work so haven't tried a text box yet. Assuming permissions and found something about adding Nginx or www-data to sudo.

<?php if (isset($_POST['button'])) { exec('echo Hello World'); } ?>
<form action="" method="post">
<button type="submit" name="button">Run</button>
</form>

(I modified this code from another post I found, but isn't displaying Hello World on the page.)

Upvotes: 0

Views: 4171

Answers (4)

TMpic
TMpic

Reputation: 73

if you run the echo as user www-data than where will the echo show up?

echo it into a file that you can use 

if (isset($_POST['button']))
{
    shell_exec("echo $_POST['button'] > /tmp/ssid");

}

than use a shell script to do what you want with the ssid.

Upvotes: 0

nicedreams
nicedreams

Reputation: 1

I found this code somewhere else that works out for the button. Now how can I use an input text box and pass that variable to SED command in linux?

<?php

echo
"<form action='' method='post'>
<input type='submit' name='use_button' value='something' />
</form>";

if(isset($_POST['use_button']))
{
    echo "hey";
}

?>

Upvotes: 0

neojos
neojos

Reputation: 1

maybe authority is limited,try { exec('sudo echo Hello World'); }

  1. try echo exec('whoami'); whether it can work
  2. echo $_POST[] to judge if the value existed
  3. mybe the command has syntax error

mybe you just need to show the result

{ echo exec('sudo echo Hello World'); }

Upvotes: 0

Ikari
Ikari

Reputation: 3246

As in your code, you have just called exec() method and passed a bash command, the output is returned to the function and not echo-ed or printed. You need to echo out the returned string or anything like: 

<?php
echo exec("echo \"Hello World\");
?>

Reference here - http://php.net/manual/en/function.exec.php

Upvotes: 1

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