blockchain.com wallet type

<?php
/*
top part of https://www.blockchain.com/explorer/addresses/btc/bc1qnytlr0qtkq8avgae763tdz7nc5nt2dguuzgsy4
*/
$string = "bc1qnytlr0qtkq8avgae763tdz7nc5nt2dguuzgsy4";
$shortning=intval(strlen($string)*0.10);
$shortAddr = substr($string,0,$shortning)."-". substr($string,-$shortning);
$typeOfWallet = substr($string,0,3);
 if ($typeOfWallet == "bc1"){
    echo "$shortAddr\n";
    echo "Bech32 (P2WPKH)\n";
    echo "Bitcoin Address\n";
    echo "$string\n";
 }else{
    //condition for other wallet types (Base58 (P2SH))
    echo substr($string,0,4)." - ". substr($string,-5);}
?>