// Get $searchType from the input, where oldmsgID=>oldposts
$searchType = "oldposts"; // by oldmsgID

// Get $ID from the input (should be >= 1)
// $ID = "28228";
$ID = "25000030";

$dirName = (strlen($ID) <= 5 ? "0" : substr($ID, 0, -5));
// $pageName = substr($ID, -2);
$pageName = (strlen($ID) < 5 ? "0xx" : substr($ID, 0, -2) . "xx");
$url = "http://loyce.club/archive/$searchType/$dirName/$pageName.html#msg$ID";
echo $url;

// http://loyce.club/archive/oldposts/0/282xx.html#msg28228
// http://loyce.club/archive/oldposts/250/250000xx.html#msg25000030

$urlBase = "http://loyce.club/archive";

// Get $searchType from the input, where oldmsgID=>oldposts, msgID=>posts, topicID=>topics and userID=>members
$searchType = "posts"; // by msgID

// Get $ID from the input (should be >= 1)
$ID = "28228";

$countDigits = ($searchType === "oldposts" ? 5 : 4);
$dirName = (strlen($ID) <= $countDigits ? "0" : substr($ID, 0, -$countDigits));
$pageName = (strlen($ID) < $countDigits ? "0xx" : substr($ID, 0, -2) . "xx");
$url = ($searchType === "oldposts" ? "$urlBase/$searchType/$dirName/$pageName.html#msg$ID" : "$urlBase/$searchType/$dirName/$ID.html");

echo $url;

// Get $searchType from the input, where msgID=>posts, topicID=>posts and userID=>members
$searchType = "posts"; // by msgID

// Get $ID from the input (should be >= 1)
$ID = "4567891";

// testing
// $ID = "45678";
// $ID = "4567";
// $ID = "456";
// $ID = "45";
// $ID = "4";

$dirName = (strlen($ID) <= 4 ? "0" : substr($ID, 0, -4));
$url = "http://loyce.club/archive/$searchType/$dirName/$ID.html";
echo $url;

// http://loyce.club/archive/posts/456/4567891.html
// http://loyce.club/archive/posts/4/45678.html
// http://loyce.club/archive/posts/0/4567.html
// http://loyce.club/archive/posts/0/456.html
// ...