CODEWITHSUNDEEP
cachingsmarty
Mask
Mask

Reputation: 34207

What does the head of smarty cache files mean?

132
a:4:{s:8:"template";a:1:{s:10:"index.html";b:1;}s:9:"timestamp";i:1256373019;s:7:"expires";i:1256373079;s:13:"cache_serials";a:0:{}}<body>
 php<br >
  java<br >
  c++<br >

</body>

Can someone explain this part:

132
    a:4:{s:8:"template";a:1:{s:10:"index.html";b:1;}s:9:"timestamp";i:1256373019;s:7:"expires";i:1256373079;s:13:"cache_serials";a:0:{}}

Upvotes: 0

Views: 164

Answers (2)

FlorianH
FlorianH

Reputation: 3102

It is a serialized version of an PHP array:

<?php
$serialized = 'a:4:{s:8:"template";a:1:{s:10:"index.html";b:1;}s:9:"timestamp";i:1256373019;s:7:"expires";i:1256373079;s:13:"cache_serials";a:0:{}}';
$unserialized = unserialize($serialized);
print_r($unserialized);

Results in:

Array
(
[template] => Array
    (
        [index.html] => 1
    )

[timestamp] => 1256373019
[expires] => 1256373079
[cache_serials] => Array
    (
    )

)

Upvotes: 1

David
David

Reputation: 2871

I don't know much about Smarty, but that looks like something similar to Bencoding, which is where you encode things like strings and arrays by specifying their lengths first. This avoids having to delimit such things with "special characters" (such as quotes) which then need to be "escaped" if they appear in the real string.

  • 132 is the length of the encoded string.
  • a:4: looks like it's introducing an associative array (dictionary) with 4 items.
  • s:8:"template" seems to be a string of length 8, with the value "template". In this case, it is the key of the first item in the dictionary.
  • The value of that item is, in this case, another dictionary which just maps the key "index.html" to the integer value 1.
  • ...And I think you can work out the rest.

Upvotes: 1

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