/**
* Performs quoted-printable encoding (this code is from Zend_Mime).
*
* @param string $str String to be encoded.
* @param int $lineLength Line length to wrap.
* @param string $lineEnd Line ending.
* @return string
*/
function encodeQuotedPrintable($str, $lineLength = 72, $lineEnd = "\n")
{
$out = '';
$str = Mail_Simple::_encodeQuotedPrintable($str);
// Split encoded text into separate lines
while ($str) {
$ptr = strlen($str);
if ($ptr > $lineLength) {
$ptr = $lineLength;
}
// Ensure we are not splitting across an encoded character
$pos = strrpos(substr($str, 0, $ptr), '=');
if ($pos !== false && $pos >= $ptr - 2) {
$ptr = $pos;
}
// Check if there is a space at the end of the line and rewind
if ($ptr > 0 && $str[$ptr - 1] == ' ') {
--$ptr;
}
// Add string and continue
$out .= substr($str, 0, $ptr) . '=' . $lineEnd;
$str = substr($str, $ptr);
}
$out = rtrim($out, $lineEnd);
$out = rtrim($out, '=');
return $out;
}
