How can the script be modified to handle errors or exceptions that may occur during the execution of shell commands?

To handle errors or exceptions that may occur during the execution of shell commands in a PHP script, you can use try-catch blocks to catch any exceptions thrown by the shell_exec function. This allows you to gracefully handle errors and prevent them from crashing the script. 

try {
    $output = shell_exec('your_shell_command_here');
    if ($output === null) {
        throw new Exception('Error executing shell command');
    }
    // Process the output here
} catch (Exception $e) {
    echo 'An error occurred: ' . $e->getMessage();
}

Keywords

shell commands error handling exceptions PHP script execution

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