array why with a callback attribute ?

By qqboy on 19 May 2015 at 02:13 UTC

For example, we see

$validation_rules['base']['min'] = array(
    'name' => 'min',
    'description' => t('Min'),
    'default_value' => '10',
    'message' => t('Please enter a value greater than or equal to {0}.'),
  );

Then, we dmp:

// min (Array, 4 elements)
  //  name (String, 3 characters ) min | (Callback) min();
  //  description (String, 3 characters ) Min | (Callback) Min();
   // default_value (String, 2 characters ) 10
  //  message (String, 50 characters ) Please enter a value greater than or equal to {0}.

can some one tell us why there is a callback with name ?

Comments

Because devel is doing:

Stefan Lehmann commented 24 May 2015 at 22:50

Because devel is doing:

if (is_callable($data)) { // Add "Callback" label }

.. and there is a PHP function for "min":
http://php.net/manual/en/function.min.php

So it's just a coincidence!

:-)

I like cookies!

can you explain a little bit

qqboy commented 25 May 2015 at 09:32

can you explain a little bit more.
i feel difficult to understand.

https://www.drupal.org/project/image_captcha_indicator
https://www.drupal.org/project/ext_js

dpm() automatically adds a path to the callback function, if the callback function exists. min() exists, so the path to the callback function is added to the array. It's coincidence in this case, as you are not calling min(). The dpm() function is just trying to give some additional information as a helper.