Current path alias

to get the current page alias path use

$path = drupal_strtolower(drupal_get_path_alias($_GET['q']));
 
//or
 
$p = current_path();
$path = drupal_lookup_path('alias',$p);

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

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

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

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

the options of drupal_add_css allow the use of conditional stylesheets

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

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

to get the current page alias path use

by using use hook_css_alter() in template.php

use