![]() ![]() The devel blocks can be managed via the block administration page.', 'description' => 'Helper functions, pages, and blocks to assist Drupal developers. 'access arguments' => array('switch users'), 'description' => 'List the contents of $_SESSION.', 'page arguments' => array('devel_variable_edit', 3), 'page callback' => 'devel_elements_page', 'description' => 'View the active form/render elements for this site.', 'access arguments' => array('execute php code'), 'page arguments' => array('devel_execute_form'), 'description' => 'Execute some PHP code', 'description' => 'View your server\'s PHP configuration', we don't want the abbreviated version provided by status report 'page callback' => 'devel_variable_page', 'description' => 'Edit and delete site variables.', 'page arguments' => array('devel_menu_rebuild'), All menu items return to their default settings.', 'description' => 'Rebuild menu based on hook_menu() and revert any custom changes. 'access arguments' => array('display source code'), 'page callback' => 'devel_display_source', 'title' => 'Display the PHP code of any file in your Drupal installation', 'description' => 'Run hook_uninstall() and then hook_install() for a given module.', 'page arguments' => array('devel_reinstall'), 'page callback' => 'devel_function_reference', 'description' => 'View a list of currently defined user functions with documentation links.', ![]() 'page callback' => 'devel_queries_empty', 'access callback' => 'devel_menu_access_store_queries', 'access arguments' => array('access devel information'), 'description' => 'Clear the CSS cache and all database cache tables which store page, node, theme and variable caches.', note: we can't dynamically append destination to querystring. Variables that are too long can slow down your pages.', => " => ". These variables are usually accessed with variable_get() and variable_set(). t('This is a list of the variables and their values currently stored in variables table and the $conf array of your settings.php file. $api = variable_get('devel_api_url', '') t('Here are the contents of your $_SESSION variable.'). Click on a function name to view its documention.'). t('This is a list of defined user functions that generated this current request lifecycle. After all, as Dijkstra said, "If debugging is the process of removing bugs, then programming must be the process of putting them in.The devel.module Drupal example source code To be sure you can print the output of file_directory_temp() You should see a result like: Debugging is a part of our job and any programmer would do well to invest in understanding their debugging tools. On windows it should write to c:\windows\temp. The command ~ $ tail -f /tmp/drupal_debug.txt will show the last few lines of that file and any new lines that are written to the file. uid) // print objects and arrays dd($user) dd(unserialize($user)) ?> On most mac or linux systems this will be written to /tmp/drupal_debug.txt. You use dd() just like var_dump() or dpm(). It’s also means your webpage's load time and html are intact. That means you don’t have to wait for the batch process to finish to see what is happening. dd() writes strings, arrays and objects to a temporary file instead of to the drupal webpage. And the indispensable devel module provides. It's unreliable enough for me to seek a better solution. You might arrive at the next page load with all your objects and debug messages printed to the screen, but you might not. So how do we debug this kind of work? Using dprint_r() or dpm() might help here. However, when we use an abstraction layer, we lose knowledge of what is happening below. Instead of an endlessly loading white page we can see a themed page that includes a progress bar. We do this to avoid PHP timeouts and provide a better user experience. Instead of loading a drupal page that runs a function to migrate all users, it loads a page that makes AJAX calls to run that function. What is going on and how do you find out? Batch API is an abstraction layer for performing tasks, in this case migrating a block of users. Except that for every migration, there are seven (seemingly random) users that aren’t migrated. The right answer is to the use the surprisingly simple Batch API. You’re a developer who has to write a user migration tool for a client. ![]()
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