<?php

function decodeBASE64($s) {
	$B64Values = array(
		"A" =>  0, "B" =>  1, "C" =>  2, "D" =>  3, "E" =>  4, "F" =>  5,
		"G" =>  6, "H" =>  7, "I" =>  8, "J" =>  9, "K" => 10, "L" => 11,
		"M" => 12, "N" => 13, "O" => 14, "P" => 15, "Q" => 16, "R" => 17,
		"S" => 18, "T" => 19, "U" => 20, "V" => 21, "W" => 22, "X" => 23,
		"Y" => 24, "Z" => 25,
		"a" => 26, "b" => 27, "c" => 28, "d" => 29, "e" => 30, "f" => 31,
		"g" => 32, "h" => 33, "i" => 34, "j" => 35, "k" => 36, "l" => 37,
		"m" => 38, "n" => 39, "o" => 40, "p" => 41, "q" => 42, "r" => 43,
		"s" => 44, "t" => 45, "u" => 46, "v" => 47, "w" => 48, "x" => 49,
		"y" => 50, "z" => 51,
		"0" => 52, "1" => 53, "2" => 54, "3" => 55, "4" => 56, "5" => 57,
		"6" => 58, "7" => 59, "8" => 60, "9" => 61, "+" => 62, "," => 63
	);
	$p = 0;
	$d = '';
	$unicodeNullByteToggle = 0;
	for ($i = 0; $i < strlen($s); $i++) {
		$c = $s[$i];
		if ($p == 0) {
			$t = $B64Values[$c];
			$p = 1;
		} elseif ($p == 1) {
			if ($unicodeNullByteToggle) {
				$d = $d . chr(($t << 2) + (($B64Values[$c] & 48) >> 4));
				$unicodeNullByteToggle = 0;
			} else {
				$unicodeNullByteToggle = 1;
			}
			$t = ($B64Values[$c] & 15);
			$p = 2;
		} elseif ($p == 2) {
			if ($unicodeNullByteToggle) {
				$d = $d . chr(($t << 4) + (($B64Values[$c] & 60) >> 2));
				$unicodeNullByteToggle = 0;
			} else {
				$unicodeNullByteToggle = 1;
			}
			$t = ($B64Values[$c] & 3);
			$p = 3;
		} elseif ($p == 3) {
			if ($unicodeNullByteToggle) {
				$d = $d . chr(($t << 6) + $B64Values[$c]);
				$unicodeNullByteToggle = 0;
			} else {
				$unicodeNullByteToggle = 1;
			}
			$t = ($B64Values[$c] & 3);
			$p = 0;
		}
	}
	return $d;
}

function imap_utf7_decode_local($s) {
	$b64_s = '';
	$iso_8859_1_s = '';
	for ($i = 0; $i < strlen($s); $i++) {
		$c = $s[$i];
		if (strlen($b64_s) > 0) {
			if ($c == '-') {
				if ($b64_s == '&') {
					$iso_8859_1_s = $iso_8859_1_s . '&';
				} else {
					$iso_8859_1_s = $iso_8859_1_s .
					  decodeBASE64(substr($b64_s, 1));
				}
				$b64_s = '';
			} else {
				$b64_s = $b64_s . $c;
			}
		} else {
			if ($c == '&') {
				$b64_s = '&';
			} else {
				$iso_8859_1_s = $iso_8859_1_s . $c;
			}
		}
	}
	return $iso_8859_1_s;
}

?>