Generate Ethereum Wallet using PHP

composer.json

{
    "require": {
        "sop/asn1": "^3.3",
        "sop/crypto-encoding": "^0.2.0",
        "sop/crypto-types": "^0.2.1",
        "kornrunner/keccak": "^1.0",
        "symfony/dotenv": "^4.0",
        "sc0vu/web3.php": "dev-master"
    }
}

GenerateEthereumWallet.php

<?php

require_once "vendor/autoload.php";

use Sop\CryptoTypes\Asymmetric\EC\ECPublicKey;
use Sop\CryptoTypes\Asymmetric\EC\ECPrivateKey;
use Sop\CryptoEncoding\PEM;
use kornrunner\keccak;

/**
 * @return array
 * @throws \Exception
 */
public function getNewWallet()
{
    $config = [
        'private_key_type' => OPENSSL_KEYTYPE_EC,
        'curve_name' => 'secp256k1'
    ];

    $res = openssl_pkey_new($config);
    if (!$res)
        throw new \Exception('ERROR: Fail to generate private key. -> ' . openssl_error_string());

    // Generate Private Key
    openssl_pkey_export($res, $prev_key);

    // Get The Public Key
//        $key_detail = openssl_pkey_get_details($res);
//        $pub_key = $key_detail["key"];
    $priv_pem = PEM::fromString($prev_key);

    // Convert to Elliptic Curve Private Key Format
    $ec_priv_key = ECPrivateKey::fromPEM($priv_pem);

    // Then convert it to ASN1 Structure
    $ec_priv_seq = $ec_priv_key->toASN1();

    // Private Key & Public Key in HEX
    $priv_key_hex = bin2hex($ec_priv_seq->at(1)->asOctetString()->string());
    $pub_key_hex = bin2hex($ec_priv_seq->at(3)->asTagged()->asExplicit()->asBitString()->string());


    // Derive the Ethereum Address from public key
    // Every EC public key will always start with 0x04,
    // we need to remove the leading 0x04 in order to hash it correctly
    $pub_key_hex_2 = substr($pub_key_hex, 2);


    // Hash time
    $hash = Keccak::hash(hex2bin($pub_key_hex_2), 256);


    // Ethereum address has 20 bytes length. (40 hex characters long)
    // We only need the last 20 bytes as Ethereum address
    $wallet_address = '0x' . substr($hash, -40);
    $wallet_private_key = '0x' . $priv_key_hex;
    $wallet_pubic_key = '0x' . $pub_key_hex;

    return array("address" => $wallet_address, "private_key" => $wallet_private_key, "pubic_key" => $wallet_pubic_key);
}

How to get the seed phrase from the keys, can you tell me?
Is it possible?