Programmaticly building htpasswd

foo:$apr1$y1cXxW5l$3vapv2yyCXaYz8zGoXj241

foo:{SHA}BW6v589SIg3i3zaEW47RcMZ+I+M=

<?php

$login = 'foo';
$pass = 'pass';
$hash = base64_encode(sha1($pass, true));

$contents = $login . ':{SHA1}' . $hash;

file_set_contents('.htpasswd', $contents);

?>

<FORM METHOD="POST" ACTION="<? echo $_SERVER['PHP_SELF']; ?>" onSubmit='return ValidateForm()'>
Username<br /><INPUT TYPE="TEXT" NAME="user[]"><br /><br />
Password<br /><INPUT TYPE="PASSWORD" NAME="password1[]"><br />
<INPUT TYPE="PASSWORD" NAME="password2[]"><br /><br />
<INPUT type=submit name="submit" VALUE="Create .htpasswd entry" onclick="document.all.submit.style.visibility='hidden'">
</FORM>

if ( isset($_POST['user']) && isset($_POST['password1'])) {
  if( $_POST['password1'] == $_POST['password2'] ) {
    $user = $_POST['user'];
    $password1 = $_POST['password1'];
    $htpasswd_text = "";
    for ($i = 0; $i < count ($user); $i++) {
     $htpasswd_text .= "$user[$i]:".crypt($password1[$i],CRYPT_STD_DES)."";
    }
    echo "<br />Copy this line to your .htpasswd file:";
    echo "<pre style="border-bottom-width:1px;border-bottom-style:solid;">";
    echo nl2br($htpasswd_text);
    echo "</pre><br />";
  } else {
      echo "<pre style="border-bottom-width:1px;border-bottom-style:solid;">Passwords do not match !</pre><br />";
  }
}

<?php

// Set the password & username
$username = 'user';
$password = 'mypassword';

// Get the hash, letting the salt be automatically generated
$hash = crypt($password);

// write to a file
file_set_contents('.htpasswd', $username ':' . $contents);

?>