已有一段 JAVA 的 MD5 函数，需要一个可以返回同样结果的 PHP 函数，我写了一个函数，但是有时结果相同，有时不同

[qiayue]

（gist 放帖子内容最后了）
目前发现：
signDataWithMD5Key("v2ex.com", "123456") 返回值是 VAUtitqCZKQpYD+5frUNfQ==
md5_by_key("v2ex.com", "123456") 返回值也是 VAUtitqCZKQpYD+5frUNfQ==
也就是说两者结果一致

但是，下面的情况就不一致了
要加密的字符串都是
timestamp=2014-12-19 10:10:10.234&content=gvNK0T++B/sMeylEgUI6AoCV/MZjwcEKA703GgDNrss/iIBBaEcaR5Me4M/6tCH2SPtKBg2dy9NR\r\nXjPFL6Cq4zh6P/jqEO4tMYFQpPGyCiDypB7bDtGVlUkF6i1lhkSSuffbjYuRS5XOnaMR1m7Oet72\r\ndxILjue7qcvusNvT6+eu92ajWIgbkZnWRcStdzjhA3/e9ZrlJBnHrpRjt0l9MC6idJR8s9rsStdf\r\nW65O5+ei+gBOB8tTMpeiuEDFXpvVnzhB1PfurZk6ArNzau6j3p385U873uOiyvhy6TVlyqheuJ3y\r\n/HXpB4k1z3pMr40g5PKlfaJMN52avM2FF2YqUCTme0Wasx9amKqoWrDkD90lveividnq4ooXH/NV\r\nVPX0gYLdEfggXg7rF4q9Na9lmSRxwyd/58BiwRkjk3+MWNCuVw6EctTMtV5BCP4vuTz4iwU5yTYm\r\nh16Zy1QwdZ+oLUoLBI63mgU9sbVFUmGZgTisvhAwKXf25bFhpyBUmS+9
key 都是 123456
Java 的 signDataWithMD5Key 得到的结果是 sde2Y178HtqCR08ldXmfxQ==
php 的 md5_by_key 得到的结果是 V3//cwX5ldkNU73R58GSyQ==

我真正的问题是，该如何写一个跟 java 的 signDataWithMD5Key 得出一样结果的 php 函数

timestamp=2014-12-19 10:10:10.234&content=gvNK0T++B/sMeylEgUI6AoCV/MZjwcEKA703GgDNrss/iIBBaEcaR5Me4M/6tCH2SPtKBg2dy9NR\r\nXjPFL6Cq4zh6P/jqEO4tMYFQpPGyCiDypB7bDtGVlUkF6i1lhkSSuffbjYuRS5XOnaMR1m7Oet72\r\ndxILjue7qcvusNvT6+eu92ajWIgbkZnWRcStdzjhA3/e9ZrlJBnHrpRjt0l9MC6idJR8s9rsStdf\r\nW65O5+ei+gBOB8tTMpeiuEDFXpvVnzhB1PfurZk6ArNzau6j3p385U873uOiyvhy6TVlyqheuJ3y\r\n/HXpB4k1z3pMr40g5PKlfaJMN52avM2FF2YqUCTme0Wasx9amKqoWrDkD90lveividnq4ooXH/NV\r\nVPX0gYLdEfggXg7rF4q9Na9lmSRxwyd/58BiwRkjk3+MWNCuVw6EctTMtV5BCP4vuTz4iwU5yTYm\r\nh16Zy1QwdZ+oLUoLBI63mgU9sbVFUmGZgTisvhAwKXf25bFhpyBUmS+9

view raw data hosted with ❤ by GitHub

	public class ActivityMd5Util {
	public static final Log log = LogFactory.getLog(ActivityMd5Util.class);
	public static String signDataWithMD5Key(String baseStr, String md5Key) {
	String signature = null;
	String urlparam = md5Key + "" + baseStr + "" + md5Key;
	try {
	MessageDigest md5Digest = MessageDigest.getInstance("MD5");
	byte[] digByteResult = md5Digest.digest(urlparam.getBytes("UTF-8"));
	signature = Base64Utils.encode(digByteResult);
	} catch (NoSuchAlgorithmException e) {
	log.error("MD5异常!" + e.getMessage(),e);
	return null;
	} catch (UnsupportedEncodingException e) {
	log.error("MD5异常!" + e.getMessage(),e);
	return null;
	} catch (Exception e) {
	log.error("MD5异常!" + e.getMessage(),e);
	return null;
	}
	return signature;
	}
	}

view raw md5java hosted with ❤ by GitHub

	function md5_by_key($data, $key){
	$data = $key.$data.$key;
	return base64_encode(md5($data,TRUE));
	}

view raw md5php hosted with ❤ by GitHub

[mhycy]

转义问题
字符串中有\r\n等字符
在PHP中，使用双引号引用这段文字并输出的结果是sde2Y178HtqCR08ldXmfxQ==与JAVA相符

[mhycy]

https://gist.github.com/anonymous/07bf755fe64eb76df627

[qiayue]

我发现了，是因为 \ 的原因，把 \ 替换为其他字符，或者变成双斜杠，结果就变成一样了

[qiayue]

@mhycy 谢谢，问完了，我就意识到问题在哪里了

[mhycy]

@qiayue 解决了就好