Simple n secure data Encryption and Decryption function using php

Simple Encryption and decryption function in php

we use mcrypt php function to encrypt a string and decrpyt the same string.so these are the function to encypt and decrypt a string in php.

Php function to encrypt a string.

 public function encryptHash($value)
      {

        $key = 'wt1U5qZAWJFYUGenFoMOiLwQrGLgdbHA';

        $iv = mcrypt_create_iv(
                mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC),
                MCRYPT_DEV_URANDOM
            );

            $encrypted = base64_encode(
                $iv .
                mcrypt_encrypt(
                    MCRYPT_RIJNDAEL_128,
                    hash('sha256', $key, true),
                    $value,
                    MCRYPT_MODE_CBC,
                    $iv
                )
            );

            return $encrypted;
        /*
            $key = 'wt1U5qZAWJFYUGenFoMOiLwQrGLgdbHA'; //wt1U5MACWJFTXGenFoZoiLwQGrLgdbHA
            $result = Security::encrypt($value, $key);
            return $result;

        */   
      } 

Php function to decrypt a string

      public function  decryptHash($value)
      {
        $key = 'wt1U5MACWJFTXGenFoZoiLwQGrLgdbHA';
        $data = base64_decode($value);
        $iv = substr($data, 0, mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC));

        $decrypted = rtrim(
            mcrypt_decrypt(
                MCRYPT_RIJNDAEL_128,
                hash('sha256', $key, true),
                substr($data, mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC)),
                MCRYPT_MODE_CBC,
                $iv
            )
            //"\0"
        );

        return $decrypted;

        /*
            $key = 'wt1U5MACWJFTXGenFoZoiLwQAbuDsaeQ';
            $result = Security::decrypt($value, $key);
            return $result;

            */
      }

EXAMPLE -

$string ="your string";

$encrypted = encryptHash($string);

$decrypted_data = decryptHash($encrypted);

these functions will encrypt an string using key and decrypt the same string using the same key. you can use these function to encrypt and decrypt your passwords.