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   1 ---
   2 title: Hash Extension
   3 author: m6w6
   4 tags:
   5 - PHP
   6 ---
   7
   8 If you didn't notice yet, there's a new, seemingly unimpressive, nevertheless
   9 very useful, extension on the horizon, namely
  10 ext/[hash](http://pecl.php.net/package/hash).
  11
  12 The initial version, proposed by Sara and Stefan -and it seems that Rasmus had
  13 his hands on it too- already featured the most common algorithms, and it has
  14 recently been extended to support now fairly every algo which libmhash
  15 provides.
  16
  17 There's not been any public release yet, which means you'd need to build from
  18 CVS. [pecl4win](http://pecl4win.php.net) though, already provides fresh
  19 modules for Windows users.
  20
  21 ### It's usage is simple and intuitive
  22 Hashing a string:
  23 ```php
  24 echo hash('sha384', 'The quick brown fox jumps over the lazy dog');
  25 ```
  26 Hashing a file:
  27 ```php
  28 echo hash_file('md5', 'release-1.0.tgz');
  29 ```
  30 There's also an incremental interface available.
  31
  32 The recently released version of the [HTTP
  33 extension](http://pecl.php.net/package/pecl_http) now uses the HASH extension
  34 instead of libmhash for generating its etag hashes.
  35
  36 ## Update:
  37 Just in case you missed, Sara released
  38 [pecl/hash](http://pecl.php.net/package/hash) today.
  39 Check it out -- It'll be bundled with PHP-5.1.2!
  40