Change hook order

Different implementations of the same hook execute in an order based on the weight value in the system table then the alphabetical order. You can change the order by updating the weight in the db but it could be more fine tuned to just change the hook order by using hook_module_implements_alter().

  1. /**
  2.  * Implements hook_module_implements_alter().
  3.  */
  4. function mymodule_module_implements_alter(&$implementations, $hook) {
  5.   // Function authcache_authcache_preclude must be executed after
  6.   // anothermodule_authcache_preclude.
  7.   if($hook == 'authcache_preclude') {
  8.     if (array_key_exists('authcache', $implementations)) {
  9.       $my_module = $implementations['authcache'];
  10.       unset($implementations['authcache']);
  11.       $implementations['authcache'] = $my_module;
  12.     }
  13.   }
  14. }

override a default .tpl.php file in a custom module

to basically use a template file in a custom module use the hook_theme_registry_alter(&$theme_registry) like this

Testing date fields: strtotime tips

Unit testing the creation of a node with a date field could fail because of wrong interpretation of the date by strtotime function

Enable block

There is no available API to programmatically set a block. Like Drupal core does, we have to use db directly.

simpletest: count checkboxes checked

Sometimes it is useful to know exactly the amount of options enabled with a xpath expression

Add a conditional stylesheet for IE

the options of drupal_add_css allow the use of conditional stylesheets

debug drush (and php-cli)

Drush uses the cli version of php so traditional debugging tools and functions don't work.

Create an image style

to create in code, programmatically an image style (previously called image cache preset)

Current path alias

to get the current page alias path use

Unset core stylesheet in a custom theme

by using use hook_css_alter() in template.php

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