Execute background php script with shell_exec command that works with SSH

Question

The problem I am struggling for a few hours is: I want to execute a script in background with PHP, so I'm using shell_exec() function, and I can't get it work. But is not a problem related with shell_exec function because I have tested the shell_exec('sleep 5') command and it worked. The command Im trying to execute is:

shell_exec('nohup /kunden/usr/local/bin/php5.4 /kunden/homepages/XX/dXXXXXXXX/htdocs/myproject/background_script.php > /dev/null 2>&1 & echo $!');

The script inserts one row in a MySQL database. I have tested the exact same command inside the quotes via SSH with putty and it worked perfectly, but i can't get it work from the web browser.

I don't think is important, but is a shared server with 1and1.

You say "i can't get it work inside my php code". What happens or doesn't happen? Do you get any error messages? Maybe you could remove the redirection in the command, so you're not throwing away any error messages that the program is emitting. — Kenster
– Kenster, Commented Aug 10, 2014 at 15:04
I know is not working because is not inserting the row in the database. If I do echo shell_exec('...') from the php in the browser returns the pid number. In last execution 13885. Is there something I am missing? — Jesús Cerezuela Zaplana
– Jesús Cerezuela Zaplana, Commented Aug 10, 2014 at 15:21

Kenster · Accepted Answer · 2017-11-29 17:57:37Z

1

According to the original poster:

Finally I used the library phpseclib and now I have it working.

$ssh = new Net_SSH2('myhosting');
if (!$ssh->login('user', 'pass')) {
    exit('Login Failed');
}

$this->pid = $ssh->exec(sprintf(
    '%s > %s 2>&1 & echo $!',
    $this->command,
    $outputFile
));

answered Nov 29, 2017 at 17:57

community wiki

Kenster

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Comments

Edward · Accepted Answer · 2022-04-08 12:24:14Z

0

it works for me:

$connection = ssh2_connect('host', 22);
ssh2_exec($connection, "screen -dmS 'php-script' /kunden/usr/local/bin/php5.4 /kunden/homepages/XX/dXXXXXXXX/htdocs/myproject/background_script.php 2>&1");

answered Apr 8, 2022 at 12:24

Edward

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