You can use direct access to this page from your browser address bar.
Type string that you need to encode with algorithm according to next schema:
For example to visit page that contains hash of "hello world" you can just visit url:
The another cool thing is that you can specify "json" or "plain" mode into URL and you will get only HASH in response.
Schema of this future:
Will output only:
You can use direct access to hash in your applications.
$str = 'hello world';
$md5hash = file_get_contents($url);
echo 'Hash of "'.$str.'" is "'.$md5hash.'"';
Hash of "hello world" is "5eb63bbbe01eeed093cb22bb8f5acdc3"
Keep in mind that this example no make sense because PHP has builtin function hash() which do the same.