Unable to replicate an encryption method from Java to PHP using AES/ECB/PKCS5Padding

I have the following Java code

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

public class AESEncryption 
{
    public static final String AES_TRANSFORMATION = "AES/ECB/PKCS5Padding";
    public static final String AES_ALGORITHM = "AES";
    public static final int ENC_BITS = 256;
    public static final String CHARACTER_ENCODING = "UTF-8";

    private static Cipher ENCRYPT_CIPHER;
    private static Cipher DECRYPT_CIPHER;
    private static KeyGenerator KEYGEN; 

    static
    {
        try
        {
            ENCRYPT_CIPHER = Cipher.getInstance(AES_TRANSFORMATION);
            DECRYPT_CIPHER = Cipher.getInstance(AES_TRANSFORMATION);
            KEYGEN = KeyGenerator.getInstance(AES_ALGORITHM);
            KEYGEN.init(ENC_BITS);
        }
        catch(NoSuchAlgorithmException | NoSuchPaddingException e) 
        {
            e.printStackTrace();
        }
    }

    /**
     * This method is used to encode bytes[] to base64 string.
     * 
     * @param bytes
     *            : Bytes to encode
     * @return : Encoded Base64 String
     */

    private static String encodeBase64String(byte[] bytes) 
    {
         return new String(java.util.Base64.getEncoder().encode(bytes));
    }

    /**
    * This method is used to decode the base64 encoded string to byte[]
    * 
    * @param stringData
    *            : String to decode
    * @return : decoded String
    * @throws UnsupportedEncodingException
    */

    private static byte[] decodeBase64StringTOByte(String stringData) throws Exception 
    {
        return java.util.Base64.getDecoder().decode(stringData.getBytes(CHARACTER_ENCODING));
    }

    /**
    * This method is used to encrypt the string which is passed to it as byte[] and return base64 encoded
    * encrypted String
    * @param plainText
    *            : byte[]
    * @param secret
    *            : Key using for encrypt
    * @return : base64 encoded of encrypted string.
    * 
    */

    private static String encryptEK(byte[] plainText, byte[] secret)
    {
        try
        {
            SecretKeySpec sk = new SecretKeySpec(secret, AES_ALGORITHM);
            ENCRYPT_CIPHER.init(Cipher.ENCRYPT_MODE, sk);
            return Base64.encodeBase64String(ENCRYPT_CIPHER.doFinal(plainText));    
        }
        catch(Exception e)
        {
            e.printStackTrace();
            return "";
        }
    }

    /**
    * This method is used to decrypt base64 encoded string using an AES 256 bit key.
    * 
    * @param plainText
    *            : plain text to decrypt
    * @param secret
    *            : key to decrypt
    * @return : Decrypted String
    * @throws IOException
    * @throws InvalidKeyException
    * @throws BadPaddingException
    * @throws IllegalBlockSizeException
    */
    public static byte[] decrypt(String plainText, byte[] secret)
                throws InvalidKeyException, IOException, IllegalBlockSizeException,
                BadPaddingException,Exception 
    {
        SecretKeySpec sk = new SecretKeySpec(secret, AES_ALGORITHM);
        DECRYPT_CIPHER.init(Cipher.DECRYPT_MODE, sk);       
        return DECRYPT_CIPHER.doFinal(Base64.decodeBase64(plainText));
    }

    public static void main(String args[])throws Exception
    {
        String encKey = ""; 

        //client asp_secret
        String asp_secret="";   


        byte[] enc_key = decrypt(encKey, asp_secret.getBytes());

        String enc_asp_secret=encryptEK(asp_secret.getBytes(), decodeBase64StringTOByte(encodeBase64String(enc_key)));

        System.out.println("asp secret encrypted:");
        System.out.println(enc_asp_secret);     
    }
}

I happened to see a very similar post in StackOverflow with no answers

Cannot replicate an AES 256 encryption code from Java to PHP [duplicate]

which is marked duplicate to another question which is different.

I have tried a couple of PHP codes but it didn't work out.

I will add up bounty for this as im trying this for ages.

Disclaimer : Used the same code snippet from the above question as this one is more clear.

Adding the PHP code I tried class AtomAES {

public function encrypt($data = '', $key = NULL, $salt = "") {
    if($key != NULL && $data != "" && $salt != ""){

        $method = "AES-256-CBC";

        //Converting Array to bytes
        $iv = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
        $chars = array_map("chr", $iv);
        $IVbytes = join($chars);


        $salt1 = mb_convert_encoding($salt, "UTF-8"); //Encoding to UTF-8
        $key1 = mb_convert_encoding($key, "UTF-8"); //Encoding to UTF-8

        //SecretKeyFactory Instance of PBKDF2WithHmacSHA1 Java Equivalent
        $hash = openssl_pbkdf2($key1,$salt1,'256','65536', 'sha1'); 

        $encrypted = openssl_encrypt($data, $method, $hash, OPENSSL_RAW_DATA, $IVbytes);

        return bin2hex($encrypted);
    }else{
        return "String to encrypt, Salt and Key is required.";
    }
}

public function decrypt($data="", $key = NULL, $salt = "") {
    if($key != NULL && $data != "" && $salt != ""){
        $dataEncypted = hex2bin($data);
        $method = "AES-256-CBC";

        //Converting Array to bytes
        $iv = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
        $chars = array_map("chr", $iv);
        $IVbytes = join($chars);

        $salt1 = mb_convert_encoding($salt, "UTF-8");//Encoding to UTF-8
        $key1 = mb_convert_encoding($key, "UTF-8");//Encoding to UTF-8

        //SecretKeyFactory Instance of PBKDF2WithHmacSHA1 Java Equivalent
        $hash = openssl_pbkdf2($key1,$salt1,'256','65536', 'sha1'); 

        $decrypted = openssl_decrypt($dataEncypted, $method, $hash, OPENSSL_RAW_DATA, $IVbytes);
        return $decrypted;
    }else{

        return "Encrypted String to decrypt, Salt and Key is required.";

    }
}

}

I am not able to decrypt a string generated using java using this PHP

Update

here is the text and key that i tried for encryption using the above java code

Random generated text  : DTosv9G179D0cY1985Uh2eF6ND80C95L
Random generated Key used : VEMwcCYfFpsrXQVIFTDrA/2zP/5PYOY6JC1XEkEcLGSk/klt+HqHzGSr781Yznku
Encrypted string using above java code : Hdy7ska03zrlWbykgulLOBIrwelFHP1AHKsh0DbBDFXFP7mY9OLzGRms/K8Pb81z

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