execute script system exec escapeshellcmd

class MyCLI {

  public $last_response;
  private $cli_is_available = false; //TODO: factory pattern
  private $executable;

  public function __construct($executable="/bin/echo") {
    $this->last_response = null;
    if (file_exists($executable)) {
      $this->cli_is_available = true;
      $this->executable = $executable;
    }
  }

  public function is_available() {
    return $this->cli_is_available;
  }

  public function foobar() {
    $this->run_command('some stuff here');
  }

  private function run_command($argument_string) {
    $command = $this->executable . escapeshellcmd($argument_string);
    exec($command, $output, $status);
    if ($status == 0) {
      $this->last_response = implode($output);
    }
    return $status;
  }
}

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YOU CAN'T USE SUID ON A SHELL SCRIPT so these only work if www-data owns the script
(and can do whatever commands are in the script...)

loggedon.sh
//CAN'T DO TAIL WITHOUT SUDO!
tail /var/log/apache2/access.log > loggedon.tmp
mail -s SOFTWARE-DOWNLOAD iser@domain < loggedon.tmp

<?php

    exec( './loggedon.sh');

    //  system( './loggedon.sh');       displays results
    //  passthru( './loggedon.sh');     displays all results!
?>


or system: Execute an external program and display the output

string system ( string $command [, int &$return_var ] )


ensure that www-data (or the apache user) has ownership and permissions

chown root:www-data loggedon.sh
chmod 550 loggedon.sh