Problem:
I have a login/registration app which stores password in encrypted form on MySQL server database. I want to have no encryption in the user password for future recovery. This PHP is not made by me neither I have that expertise to edit it. If you guys can help how to remove encryption in this so that I can see password of users in database. Novice here.
P.S- I don't want users credentials for any misuse. I tried many methods of providing a password recovery system to the users but nothing worked. So I want to keep password visible to me in database so that if someone request for his/her password I should be able to provide them.
<?php
class DB_Functions
{
private $db;
//put your code here
// constructor
function __construct() {
    require_once 'DB_Connect.php';
    // connecting to database
    $this->db = new DB_Connect();
    $this->db->connect();
}
// destructor
function __destruct() {
}
/**
 * Storing new user
 * returns user details
 */
public function storeUser($name, $email, $password, $number) {
    $uuid = uniqid('', true);
    $hash = $this->hashSSHA($password);
    $encrypted_password = $hash["encrypted"]; // encrypted password
    $salt = $hash["salt"]; // salt
    $result = mysql_query("INSERT INTO users(unique_id, name, email, encrypted_password, number, salt, created_at) VALUES('$uuid', '$name', '$email', '$encrypted_password', '$number', '$salt', NOW())");
    // check for successful store
    if ($result) {
        // get user details 
        $uid = mysql_insert_id(); // last inserted id
        $result = mysql_query("SELECT * FROM users WHERE uid = $uid");
        // return user details
        return mysql_fetch_array($result);
    } else {
        return false;
    }
}
/**
 * Get user by email and password
 */
public function getUserByEmailAndPassword($email, $password) {
    $result = mysql_query("SELECT * FROM users WHERE email = '$email'") or die(mysql_error());
    // check for result 
    $no_of_rows = mysql_num_rows($result);
    if ($no_of_rows > 0) {
        $result = mysql_fetch_array($result);
        $salt = $result['salt'];
        $encrypted_password = $result['encrypted_password'];
        $hash = $this->checkhashSSHA($salt, $password);
        // check for password equality
        if ($encrypted_password == $hash) {
            // user authentication details are correct
            return $result;
        }
    } else {
        // user not found
        return false;
    }
}
/**
 * Check user is existed or not
 */
public function isUserExisted($email) {
    $result = mysql_query("SELECT email from users WHERE email = '$email'");
    $no_of_rows = mysql_num_rows($result);
    if ($no_of_rows > 0) {
        // user existed 
        return true;
    } else {
        // user not existed
        return false;
    }
}
/**
 * Encrypting password
 * @param password
 * returns salt and encrypted password
 */
public function hashSSHA($password) {
    $salt = sha1(rand());
    $salt = substr($salt, 0, 10);
    $encrypted = base64_encode(sha1($password . $salt, true) . $salt);
    $hash = array("salt" => $salt, "encrypted" => $encrypted);
    return $hash;
}
/**
 * Decrypting password
 * @param salt, password
 * returns hash string
 */
public function checkhashSSHA($salt, $password) {
    $hash = base64_encode(sha1($password . $salt, true) . $salt);
    return $hash;
}} ?>
 
    