<?php
function quoted_printable_encode( $str, $chunkLen = 72 )
{
$offset = 0;
$str = strtr(rawurlencode($str), array('%' => '='));
$len = strlen($str);
$enc = '';
while ( $offset < $len )
{
if ( $str{ $offset + $chunkLen - 1 } === '=' )
{
$line = substr($str, $offset, $chunkLen - 1);
$offset += $chunkLen - 1;
}
elseif ( $str{ $offset + $chunkLen - 2 } === '=' )
{
$line = substr($str, $offset, $chunkLen - 2);
$offset += $chunkLen - 2;
}
else
{
$line = substr($str, $offset, $chunkLen);
$offset += $chunkLen;
}
if ( $offset + $chunkLen < $len )
$enc .= $line ."=\n";
else
$enc .= $line;
}
return $enc;
}
?>
