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File: 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. */ /** * 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) { } }