PHP: Generate a new htpasswd file

gistfile1.php

<?php
  if (sizeof($_POST) > 0) {
    $return_code = -1;
    
    // Command to generate a new htpasswd
    $command = 'htpasswd -nb ' . $_POST['new_username'] . ' ' . $_POST['new_password'];
    
    // Execute command
    exec($command, $result);
    
    // Check to make sure we got output and replace the current htpasswd with the new password
    if (!empty($result[0]))
      exec('echo ' . $result[0] . ' >| http-access', $array, $return_code);
  }
?>