php如何使用3des加解密及hmacsha256加密

function encrypt($str) { 
         $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, ''); 
         mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv)); 
         $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);  
        $pad = $block - (strlen($str) % $block);  
        $str .= str_repeat(chr($pad), $pad);  
        $encrypted = mcrypt_generic($td, $str); 
         mcrypt_generic_deinit($td); 
         mcrypt_module_close($td);  
        return base64_encode($encrypted);  
    } 
 
    function decrypt($code) {  
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');  
        mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));  
        $str = mdecrypt_generic($td, base64_decode($code));  
        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC); 
         mcrypt_generic_deinit($td); 
        mcrypt_module_close($td); 
        return $this->strippadding($str); 
    }

//加密
public function encrypt($data)
{
 
    if ($data== null || empty($data)) {
        return $data;
    }
    $secret_key = "your key";
    $iv = "your iv";
    $result= base64_encode(openssl_encrypt( $data, "aes-256-cbc", $secret_key, OPENSSL_RAW_DATA, $iv));
 
    return $result;
    
}
 
//解密
public function decode($data)
{
    if ($data== null || empty($data)) {
        return $data;
    }
    $secret_key = "your key";
    $iv = "your iv";
    $result= openssl_decrypt(base64_decode($data), "aes-256-cbc", $secret_key, OPENSSL_RAW_DATA, $iv);
 
    return $result;
   
}

openssl_encrypt($data, $method, $password, $options, $iv)

openssl_decrypt($data, $method, $password, $options, $iv)

string hash_hmac ( string $algo , string $data , string $key [, bool $raw_output = false ] )