Easy MD5 password Encryption Decryption Example using php

Here are the main lines of code the encrypt the password


PART 1 Password Encryption 
//get the password in variable
$password = isset($_GET['password']) ? mysql_real_escape_string($_GET['password']) :  "";

//here n5tZoJDknmUgY6LR21FFr4SAoQK8ACajoO3egV0I2JU4Uu8ihuk20hgm is the hashkey do save it
//encrypt using the below syntax then insert into database

 $password = md5("n5tZoJDknmUgY6LR21FFr4SAoQK8ACajoO3egV0I2JU4Uu8ihuk20hgm".$password."");

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Here below is the full code I used

<?php header('Access-Control-Allow-Origin: *'); ?>
<?php header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept'); ?>
<?php header('Access-Control-Allow-Methods: POST, GET, OPTIONS, PUT'); ?>

<?php

//echo "hi there";


include_once('confi.php');
error_reporting(E_ALL);
$name = isset($_GET['name']) ? mysql_real_escape_string($_GET['name']) :  "";
$email = isset($_GET['email']) ? mysql_real_escape_string($_GET['email']) :  "";
$password = isset($_GET['password']) ? mysql_real_escape_string($_GET['password']) :  "";
    $password = md5("n5tZoJDknmUgY6LR21FFr4SAoQK8ACajoO3egV0I2JU4Uu8ihuk20hgm".$password."");
$uid = isset($_GET['uid']) ? mysql_real_escape_string($_GET['uid']) :  "";
    $idshop = isset($_GET['idshop']) ? mysql_real_escape_string($_GET['idshop']) :  "";
    if(!empty($uid)){
        $query = "SELECT * FROM ps_customer WHERE email = '$email' AND id_shop='$idshop'";
        $qur = mysql_query($query);
        $existCount = mysql_num_rows($qur); // count the row nums
if ($existCount == 0) { // evaluate the count
//echo "Proceed";
 
    $securekey = md5(uniqid(rand(), true));
   
     $insertstatement = "INSERT INTO `ps_customer` (`id_customer`, `id_shop_group`, `id_shop`, `id_gender`, `id_default_group`, `id_lang`, `id_risk`, `company`, `siret`, `ape`, `firstname`, `lastname`, `email`, `passwd`, `last_passwd_gen`, `birthday`, `newsletter`, `ip_registration_newsletter`, `newsletter_date_add`, `optin`, `website`, `outstanding_allow_amount`, `show_public_prices`, `max_payment_days`, `secure_key`, `note`, `active`, `is_guest`, `deleted`, `date_add`, `date_upd`) VALUES (NULL, '1', '$idshop', '1', '3', '1', '0', NULL, NULL, NULL, '', '$name', '$email', '$password',NOW(), '2000-01-01', '0', NULL, '0000-00-00 00:00:00', '0', NULL, '0.000000', '0', '0', '$securekey', NULL, '1', '0', '0', NOW(), NOW());";
  //  echo $insertstatement;
    $query123 = mysql_query($insertstatement);
   
   
    $selectquery = "SELECT MAX(id_customer) a FROM `ps_customer`;";
  //  echo "$selectquery";
   
     $query1 = mysql_query($selectquery);
  //  echo"test" ;
    while($row = mysql_fetch_array($query1)) {
       
      $id_customer = $row['a'];
       //  $id_customer1 = int($id_customer) + 1;
    }
   // echo "'.$id_customer.' i am first";
    //$id_customer1 = $id_customer + 1;
   // echo "$id_customer1";

    $insert2 = "INSERT INTO `ps_customer_group` (
`id_customer` ,
`id_group`
)
VALUES (
'$id_customer',  '3'
);";
   
   //echo "$insert2";
    $query123 = mysql_query($insert2);
    $true = "true";
    $result[] = array("status" => $true,"id_customer" => $id_customer);
   $json = $result;

   
}else{
    $false = "false";
//echo "Your login session data already exists in the database.";
    $result[] = array("status" => $false);
   $json = $result;
   
}
}
@mysql_close($conn);
/* Output header */
header('Content-type: application/json');
echo json_encode($json);


//echo "$query i m qwedrdfrd";
//echo "$existCount i m exist";
//echo "$insertstatement";



PART 2 Password Decryption 

Below is an example of login where we select the user from database here MD5 Decryption is used.

<?php
// Include confi.php
include_once('confi.php');
$shopid = isset($_GET['shopid']) ? mysql_real_escape_string($_GET['shopid']) :  "";
$email = isset($_GET['email']) ? mysql_real_escape_string($_GET['email']) :  "";
$passwd1 = isset($_GET['passwd']) ? $_GET['passwd'] :  "";
if(!empty($email)){
        $mysql = "select id_customer,firstname,lastname,passwd,email from ps_customer where email = '".$email."' AND id_shop='".$shopid."'";
       // echo "$mysql";
$qur = mysql_query($mysql);
$result =array();
while($r = mysql_fetch_array($qur)){
extract($r);
            //echo "$r";
$passwd1 = md5("n5tZoJDknmUgY6LR21FFr4SAoQK8ACajoO3egV0I2JU4Uu8ihuk20hgm".$passwd1."");

if($passwd1 ==$passwd){

 $result[] = array("id_customer" => $id_customer, "firstname" => $price,"lastname" => $lastname, 'passwd' => $passwd, 'email' => $email);
 }else{}}
$json = $result;
}else{
$json = array("status" => 0, "msg" => "User ID not define");
}
@mysql_close($conn);

/* Output header */
header('Content-type: application/json');
echo json_encode($json);