Create PHP Decrypt function

Hello, I have this class in JAVA, with 2 methods: criptografar AND descriptografar. I need an equivalent class in PHP code to use in a website. This 2 methods must do the same thing in JAVA (done) and PHP (pendent). thank you ---------------------- import [login to view URL]; import java.security.spec.*; import javax.crypto.*; import javax.crypto.spec.*; public class UtilCriptografia implements Serializable { private static byte[] hexToBytes(String str) { if (str == null) { return null; } else if ([login to view URL]() < 2) { return null; } else { int len = [login to view URL]() / 2; byte[] buffer = new byte[len]; for (int i = 0; i < len; i++) { buffer[i] = (byte) [login to view URL]( [login to view URL](i * 2, i * 2 + 2), 16); } return buffer; } } private static String bytesToHex(byte[] data) { if (data == null) { return null; } else { int len = [login to view URL]; String str = ""; for (int i = 0; i < len; i++) { if ((data[i] & 0xFF) < 16) { str = str + "0" + [login to view URL](data[i] & 0xFF); } else { str = str + [login to view URL](data[i] & 0xFF); } } return [login to view URL](); } } public static String criptografar(String valueLimpo, String theKEY) { byte[] theKey = null; byte[] theMsg = null; byte[] theCph = null; try { theKey = hexToBytes(theKEY); theMsg = hexToBytes(valueLimpo); KeySpec ks = new DESKeySpec(theKey); SecretKeyFactory kf = [login to view URL]("DES"); SecretKey ky = [login to view URL](ks); Cipher cf = [login to view URL]("DES/ECB/NoPadding"); [login to view URL](Cipher.ENCRYPT_MODE, ky); theCph = [login to view URL](theMsg); } catch (Exception e) { [login to view URL](); } return bytesToHex(theCph); } public static String descriptografar(String valueDES, String theKEY) { byte[] theKey = null; byte[] theMsg = null; byte[] theCph = null; try { theKey = hexToBytes(theKEY); theMsg = hexToBytes(valueDES); KeySpec ks = new DESKeySpec(theKey); SecretKeyFactory kf = [login to view URL]("DES"); SecretKey ky = [login to view URL](ks); Cipher cf = [login to view URL]("DES/ECB/NoPadding"); [login to view URL](Cipher.DECRYPT_MODE, ky); theCph = [login to view URL](theMsg); } catch (Exception e) { [login to view URL](); } return bytesToHex(theCph); } }