function base64decoding($string)
{
global $base64ids;
$string = str_replace("=", "", $string);
$binary = "";
for ($i = 0; $i < strlen($string); $i++) {
$charID = array_search($string[$i], $base64ids);
$idBIN = decToBin($charID);
if (strlen($idBIN) != 6) {
$idBIN = str_repeat("0", 6 - strlen($idBIN)) . $idBIN;
}
$binary .= $idBIN;
}
if (strlen($binary) % 8 != 0) {
$binary = substr($binary, 0, strlen($binary) - strlen($binary) % 8);
}
$array = array();
for ($j = 0; $j < strlen($binary); $j = $j + 8) {
$part = substr($binary, $j, 8);
array_push($array, $part);
}
$text = "";
foreach ($array as &$value) {
$value = binToDec($value);
$value = chr($value);
$text .= $value;
}
return $text;
}
function getCatFunctionFromName($name, $index)
{
global $l_s;
global $l_index;
$l = $l_index;
$l_index = $index;
if ($name == "b") {
$l_s = array('0');
for ($i = 0; $i < floor(($l_index + 1) / 2); ++$i) {
$l_s[] = '0';
$l_s[] = '1';
}
return array(function ($x) {
global $l_s;
global $l_index;
return $x * pow(2, $l_index) - (binToDec($l_s) - 1);
}, "*" . pow(2, $l_index) . "-" . (binToDec($l_s) - 1), floor($l_index / 2) + 1, "*" . (floor($l_index / 2) + 1));
} else {
if ($name == "a") {
$l_s = array('1');
for ($i = 0; $i < floor(($l_index - 1) / 2); ++$i) {
$l_s[] = '0';
$l_s[] = '1';
}
return array(function ($x) {
global $l_s;
global $l_index;
return ($x + (binToDec($l_s) + 1)) / pow(2, $l_index);
}, "+" . (binToDec($l_s) + 1) . "/" . pow(2, $l_index), floor($l_index / 2 + 1), "/" . (floor($l_index / 2) + 1));
} else {
return array("hallo welt", "hadsf", "hsdaf", "jdskag");
}
}
}