Alter a module weight and order of execution of a hook without changing system{table} weight.
Hook:=> hook_module_implements_alter
There are many scenarios in which for a particular hook you need to execute your module first before the same hook from any other module gets executed. Normally in Drupal 6 what we will address this by either increase/decrease the weight of the module.
In Drupal 7, a hook called 'hook_module_implements_alter' which allows to modify the order of a particular hooks execution.
Example:
Current sequence of modules in which a particular hook is implemented:
1. my_module_cache
2. flush_page_cache
3. admin_menu_source
4. esi
5. token
6. admin_menu
7. admin_menu_toolbar
Required sequence of modules in which a particular hook is implemented:
1. flush_page_cache
2. admin_menu_source
3. esi
4. token
5. admin_menu
6. admin_menu_toolbar
7. my_module_cache
Below code shows how the order is changed for a specific case of hook = 'admin_menu_output_alter'. This can be extended for any hook.
function my_module_module_implements_alter(&$implementations, $hook) { if ($hook == 'admin_menu_output_alter') { dpm($implementations, 'before'); $module = 'my_module_cache'; $group = array($module => $implementations[$module]); unset($implementations[$module]); $implementations = $implementations + $group; dpm($implementations, 'after'); } }
once my_module_module_implements_alter is executed then for the sequence of modules for hook('admin_menu_output_alter') is altered and organised as required.
