PHP 加密解密和解决URL传输问题

base64 加密和解密

<meta charset="utf-8">
<?php
$str = "http://www.onestopweb.cn";
$en=base64_encode($str);
$de=base64_decode($en);
echo "原型：$str<br>";
echo "加密后：$en<br>";
echo "解密后：$de<br>";
?>

效果图：

 

解决URL传输的问题

<meta charset="utf-8">
<?php
//urlencode 将字符串以 URL 编码。
$str = "http://www.onestopweb.cn";
$urlen = urlencode($str);
$urlde = urldecode($urlen);

//URL传输请使用下面这种
//rawurlencode 将字符串编码成 URL 专用格式。
$rawurlen = rawurlencode($str);
$rawurlde = rawurldecode($rawurlen);

echo "原型：$str<br>";
echo "urlencode加密后：$urlen<br>";
echo "urldecode解密后：$urlde<br>";
echo "rawurlencode加密后：$rawurlen<br>";
echo "rawurldecode解密后：$rawurlde<br>";
?>

效果图：

 

有点复杂的加密解密和解决URL传输问题

<meta charset="utf-8">
<?php
function encrypt($data, $key) { 
	$prep_code = serialize($data); 
	$block = mcrypt_get_block_size('des', 'ecb'); 
	if (($pad = $block - (strlen($prep_code) % $block)) < $block) { 
		$prep_code .= str_repeat(chr($pad), $pad); 
	} 
	$encrypt = mcrypt_encrypt(MCRYPT_DES, $key, $prep_code, MCRYPT_MODE_ECB); 
	return base64_encode($encrypt); 
} 
function decrypt($str, $key) { 
	$str = base64_decode($str); 
	$str = mcrypt_decrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB); 
	$block = mcrypt_get_block_size('des', 'ecb'); 
	$pad = ord($str[($len = strlen($str)) - 1]); 
	if ($pad && $pad < $block && preg_match('/' . chr($pad) . '{' . $pad . '}$/', $str)) { 
		$str = substr($str, 0, strlen($str) - $pad); 
	} 
	return unserialize($str); 
}

$key = 'login'; 
$data = array('id' => 100, 'username' => 'chaoyi', 'password' => '123456'); 
$snarr = serialize($data); 
$en = encrypt($data, $key); 
$de = decrypt($en, $key); 

echo "加密原型："; print_r($data); 
echo "<br>密钥：$key <br>
加密结果：$en <br>
解密结果：";print_r($de); 

$en2 = rawurlencode(encrypt($data, $key));
$de2 = decrypt(rawurldecode($en2), $key); 
echo "<br>可以进行URL传输的加密：".$en2."<br>";
echo "转输后进行解密:";print_r($de2);
?>

效果图：