Encryption and Decryption OpenSSL with PHP

encryption_openssl.php

<?php

class Encryption 
{

    public $config = array(
        "digest_alg" => "sha512",
        "private_key_bits" => 2046,
        "private_key_type" => OPENSSL_KEYTYPE_RSA,
    );

    public $encrypted;
    public $privateKey;
    public $decrypted;
 
    public function encrypt($data, $PlainPrivateKey){
        $res = openssl_pkey_new($this->config);        
        openssl_pkey_export($res, $PlainPrivateKey);
        $pubKey = openssl_pkey_get_details($res);
        openssl_public_encrypt($data, $encrypted, $pubKey["key"]);
        $this->privateKey = $PlainPrivateKey;
        $this->encrypted  = base64_encode($encrypted);
    }

    public function decrypt($encrypted,$privateKey){
        $encrypted = base64_decode($encrypted);
        openssl_private_decrypt($encrypted, $decrypted, $privateKey);
        $this->decrypted = $decrypted;
    }
}


$Encrypt = new Encryption;
$Encrypt->encrypt(
    'Hello how are you?', // data plain Text
    'secret key' // key
);
// result encrypted
echo $encrypted = $Encrypt->encrypted;
echo "<br/>";
// Get new private Key
$privateKey = $Encrypt->privateKey;

// get Decrypt
$Encrypt->decrypt($encrypted,$privateKey);
// result Decrypt
echo $Encrypt->decrypted;