PHP/JS stackoverflow

function getCommunityID($STEAMID_INSERT) {

    $STEAMID_INSERT = htmlspecialchars(preg_replace('/STEAM_/','',$STEAMID_INSERT), ENT_QUOTES, 'UTF-8');
    $STEAMID_INSERT = explode(":", $STEAMID_INSERT);

    if ( count( $STEAMID_INSERT ) == 3 ) {

        $serverid = intval($STEAMID_INSERT[1]);
        $accountid = intval($STEAMID_INSERT[2]);

        $RETURN_COMMUNITY_ID = ( $accountid * 2 ) + 76561197960265728 + $serverid;

    }

    return $RETURN_COMMUNITY_ID;

}

function getSteamID($COMMUNITYID_INSERT) {

    $COMMUNITYID_INSERT = htmlspecialchars($COMMUNITYID_INSERT, ENT_QUOTES, 'UTF-8');
    $COMMUNITYID_INSERT = intval($COMMUNITYID_INSERT);

    $a = ( ( $COMMUNITYID_INSERT - 76561197960265728 ) / 2 );
    $b = floor($a);
    $c = round( $a % floor($a) );

    return '0:' . $c . ':' . $b;

}