PHP version of Cipher and SecretKeySpec [closed]

I have this Java code to encrypt a data using a key:

static String IV = "\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000";
static String key = "somerandomkey0987";

public static String encrypt(String myData, String key) throws Exception {
    for(int i = 0; i < myData.length() % 16; ++i) {
        myData = myData + "\u0000";
    }

    Cipher encripta = Cipher.getInstance("AES/CBC/NoPadding", "SunJCE");
    SecretKeySpec key = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
    encripta.init(1, key, new IvParameterSpec(IV.getBytes("UTF-8")));
    return byteToHex(encripta.doFinal(myData.getBytes("UTF-8")));
}

public static String byteToHex(byte[] hash) {
    Formatter formatter = new Formatter();
    byte[] var2 = hash;
    int var3 = hash.length;

    for(int var4 = 0; var4 < var3; ++var4) {
        byte b = var2[var4];
        formatter.format("%02x", b);
    }

    String result = formatter.toString();
    formatter.close();
    return result;
}

This is working as expected. Now I need a PHP version of that, but I'm beginer on PHP. How can this method should be? I tried this:

public function encrypt($data = '', $key = NULL) {
        $ivlen = openssl_cipher_iv_length($cipher="AES-128-CBC");
        $iv = openssl_random_pseudo_bytes($ivlen);
        $ciphertext_raw = openssl_encrypt($data, $cipher, $key, 0, $iv);

        return bin2hex($ciphertext_raw);
    }

source https://stackoverflow.com/questions/68988305/php-version-of-cipher-and-secretkeyspec