[ Posted by Riaz Laskar ] riazxrazor encryption

fiddle_077471.php

<?php

$key = 2;//(int)rand(1,3);

function encode($str,$k)
{
    $newstring = '';
   foreach(range(0,strlen($str)-1) as $i)
   {
       $newstring .= chr(ord($str[$i])+$k);
   }
    
    return $newstring;
}

function decode($str,$key)
{
    $newstring = '';
    foreach(range(0,strlen($str)-1) as $i)
   {
       $newstring .= chr((int)ord($str[$i])-$key);
   }
    
    return $newstring;
}

$t = encode("winter",$key);
echo $t.'<br>';
echo $key.'<br>';
echo "decode : ". decode($t,$key);
?>