Clean up hook_help() by providing real Drupal and router paths
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #154064. -->
Reported by: [gábor hojtsy](https://www.drupal.org/user/4166)
>>>
<p>I observed the following behaviour in the menu - help interaction. After the updated menu backend, the help hook gets the following $section values for the paths:</p>
<pre> $_GET['q'] | hook_help() $section parameter<br>-----------------------------------+-----------------------<br>node/1/view | node/%<br>node/1/edit | node/%/edit<br>user/1 | user/%<br>admin/build/block/list/chameleon | admin/build/block/list/chameleon<br>admin/build/block/configure/user/1 | admin/build/block/configure </pre><p>This is not correct, we cannot access the full value of the current path.</p>
<p>Several people suggested that we should just get values from arg() and use it or rely on direct $_GET['q'] usage. Well, if we would always return help for the current page, then we would not need the $section argument at all, and we would be better getting rid ourselfs of it. But it is there, as we are not only using the help hook to get help for the current page. One example in core is to get a list of modules presented in the menu with module level help.</p>
<p>So hook_help() should get better information about the path it is required to return help for. Well, pwolanin people suggested that we should just pass on the whole menu item array, so the help hook can grab what it needs from that array. So I did a look at the actual menu array on the admin/build/block/configure/user/1:</p>
<pre>array(23) {<br> ["path"]=><br> string(27) "admin/build/block/configure"<br> ["load_functions"]=><br> string(0) ""<br> ["to_arg_functions"]=><br> string(0) ""<br> ["access_callback"]=><br> string(11) "user_access"<br> ["access_arguments"]=><br> string(35) "a:1:{i:0;s:17:"administer blocks";}"<br> ["page_callback"]=><br> string(15) "drupal_get_form"<br> ["page_arguments"]=><br> array(3) {<br> [0]=><br> string(21) "block_admin_configure"<br> [1]=><br> string(4) "user"<br> [2]=><br> string(1) "1"<br> }<br> ["fit"]=><br> string(2) "15"<br> ["number_parts"]=><br> string(1) "4"<br> ["tab_parent"]=><br> string(0) ""<br> ["tab_root"]=><br> string(27) "admin/build/block/configure"<br> ["title"]=><br> string(15) "Configure block"<br> ["title_callback"]=><br> string(1) "t"<br> ["title_arguments"]=><br> string(6) "a:0:{}"<br> ["type"]=><br> string(1) "4"<br> ["block_callback"]=><br> string(0) ""<br> ["description"]=><br> string(0) ""<br> ["position"]=><br> string(0) ""<br> ["weight"]=><br> string(1) "0"<br> ["file"]=><br> string(0) ""<br> ["href"]=><br> string(27) "admin/build/block/configure"<br> ["access"]=><br> bool(true)<br> ["map"]=><br> array(6) {<br> [0]=><br> string(5) "admin"<br> [1]=><br> string(5) "build"<br> [2]=><br> string(5) "block"<br> [3]=><br> string(9) "configure"<br> [4]=><br> string(4) "user"<br> [5]=><br> string(1) "1"<br> }<br>}</pre><p>The obvious problem with this construct is that we only need a very small portion of it (the *actual* path), but it is not present as-is in the structure, we would need to join('/', $item['map']) to get some of it. One option is to have this already in the array redundantly. This option should not be taken lightly though. The menu item array includes a copy of the whole node for example on node pages. Well, obviously that might be useful for some help stuff, but most of the time it is not required, so why pass on this data in all cases?</p>
<p>The other problem with this construct is that as mentioned above, the help hook is not used to present help text for the current page only (thinking that goes against the $section parameter), so if we replace $section with $menu_item, we would restrict the help hook to only return help for menu items. It would not be possible to just return help for simple strings.</p>
<p>Here is a simple proposal:</p>
<p> - passes on $menu_key as the second and optional parameter to hook_help(), so if a menu item is used to get the help, that can be passed on<br>
- renames $section to $path, and passes $_GET['q'] on, if we look up for a specific path<br>
- adds TODO comments for stuff chx said he will look into<br>
- example conversion on aggregator and block modules</p>
>>> [!note] Pre-migration files
- [help\_hook\_path\_01.patch](https://www.drupal.org/files/issues/help_hook_path_01.patch)
>>>
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