Location: PHPKode > projects > Zazavi > lib/swift/classes/Swift/Encoder/Base64Encoder.php
<?php

/*
 * This file is part of SwiftMailer.
 * (c) 2004-2009 Chris Corbyn
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

//@require 'Swift/Encoder.php';

/**
 * Handles Base 64 Encoding in Swift Mailer.
 * @package Swift
 * @subpackage Encoder
 * @author Chris Corbyn
 */
class Swift_Encoder_Base64Encoder implements Swift_Encoder
{
  
  /**
   * Takes an unencoded string and produces a Base64 encoded string from it.
   * Base64 encoded strings have a maximum line length of 76 characters.
   * If the first line needs to be shorter, indicate the difference with
   * $firstLineOffset.
   * @param string $string to encode
   * @param int $firstLineOffset
   * @param int $maxLineLength, optional, 0 indicates the default of 76 bytes
   * @return string
   */
  public function encodeString($string, $firstLineOffset = 0,
    $maxLineLength = 0)
  {
    if (0 >= $maxLineLength || 76 < $maxLineLength)
    {
      $maxLineLength = 76;
    }
    
    $encodedString = base64_encode($string);
    $firstLine = '';
    
    if (0 != $firstLineOffset)
    {
      $firstLine = substr(
        $encodedString, 0, $maxLineLength - $firstLineOffset
        ) . "\r\n";
      $encodedString = substr(
        $encodedString, $maxLineLength - $firstLineOffset
        );
    }
    
    return $firstLine . trim(chunk_split($encodedString, $maxLineLength, "\r\n"));
  }
  
  /**
   * Does nothing.
   */
  public function charsetChanged($charset)
  {
  }
  
}
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