What are some common reasons for the 'screen' command not working when executed from PHP?

The 'screen' command may not work when executed from PHP due to permission issues or the command not being installed on the server. To solve this, you can try running the PHP script with appropriate permissions or installing the 'screen' command on the server. 

<?php
// Use shell_exec to execute the 'screen' command
$output = shell_exec('screen -ls');
echo $output;
?>

Keywords

screen command PHP execution shell_exec permissions

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