如何将PKCS5填充的Java AES - CBC更改为PHP

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class AESExample {
    public static void main(String[] args) throws Exception {
        String plainText = "Hello, World!";
        String key = "0123456789abcdef";
        String iv = "fedcba9876543210";

        // Encrypt
        SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "AES");
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec);
        byte[] encryptedBytes = cipher.doFinal(plainText.getBytes());
        String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);
        System.out.println("Encrypted Text: " + encryptedText);

        // Decrypt
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivParameterSpec);
        byte[] decryptedBytes = cipher.doFinal(Base64.getDecoder().decode(encryptedText));
        String decryptedText = new String(decryptedBytes);
        System.out.println("Decrypted Text: " + decryptedText);
    }
}

function encrypt($plainText, $key, $iv) {
    $encryptedText = openssl_encrypt($plainText, 'AES-256-CBC', base64_decode($key), OPENSSL_RAW_DATA, hex2bin($iv));
    return base64_encode($encryptedText);
}

function decrypt($encryptedText, $key, $iv) {
    $decryptedText = openssl_decrypt(base64_decode($encryptedText), 'AES-256-CBC', base64_decode($key), OPENSSL_RAW_DATA, hex2bin($iv));
    return $decryptedText;
}

$plainText = "Hello, World!";
$key = "0123456789abcdef";
$iv = "fedcba9876543210";

$encryptedText = encrypt($plainText, $key, $iv);
echo "Encrypted Text: " . $encryptedText . "\n";

$decryptedText = decrypt($encryptedText, $key, $iv);
echo "Decrypted Text: " . $decryptedText . "\n";