PHP Basic Update Check Example

updatecheck.php

<?php
// app current version
$appversiyon = "2.2";

if($_GET["version"]){
    // GET client vresion
    $client_version = $_GET["version"];

    // compare with app version
    if($appversiyon > $client_version){
        // if client version is lower, say OK for updates
        echo "OK";
    }
    // if app version is lower, say RETURN
    else if($appversiyon < $client_version){
        echo "RETURN";
    } 
    // if they are equals
    else if($appversiyon == $client_version){
        // there is no update
        echo "NO";
    }
}
?>

usage.md

• make a web request like this url: https://domain .com/updatecheck.php?version={CLIENT_VERSION}
• version parameter must int or double eg: 1,22,13,40 or 1.2.3.4