IntelliJ IDEA provides full native support of Drupal hooks in .module files.
Completing hook declarations
IntelliJ IDEA indexes any hook invocation whereupon hook names become available in code completion for creating hook implementations. Start typing a hook name and press Ctrl+Space.
Navigating to a hook invocation from the editor
To navigate to a hook invocation from the editor, click the icon in the gutter.
In case of multiple invocations, IntelliJ IDEA displays a list of available hook invocations so you can choose which one to navigate to. You will be navigated to the line where the relevant hook is invoked with module_invoke_all(), module_invoke(), or drupal_alter().
Quick Documentation look-up for hooks
You can view quick documentation for a Drupal hook in IntelliJ IDEA. Documentation is taken from .api.php files provided by core and many other modules for reference purposes.
To view documentation on a hook, position the cursor at the hook name in question and choose View | Quick Documentation Lookup or press Ctrl+Q.
Setting the Drupal code style in a project
IntelliJ IDEA automatically offers to apply the pre-configured Drupal Coding Standards (code style) if a project is recognized as a Drupal Module, or if the Drupal integration is enabled in an existing project, or when you create a new project with a a Drupal Module. However, you can at any time change or customize this setting on the Code Style: PHP page of the Settings dialog box.
To have the pre-configured Drupal code style applied to a project, do one of the following:
In the Event Log tool window, click the Set link next to the Drupal-style formatting can be set for this project message.
On the Code Style: PHP page that opens, click the Set from link.
On the pop-up menu, choose Predefined, then choose Drupal.
Checking code against the Drupal coding standards
With IntelliJ IDEA, you can use two tools that detect violations against the Drupal coding standard: Coder and PHP Code Sniffer. They ensure your code remains clean and consistent and help prevent some common semantic errors made by developers.
Register PHP Code Sniffer with IntelliJ IDEA and configure it as a IntelliJ IDEA inspection. For details, see PHP Code Sniffer.
To use Coder, the native Drupal code quality tool:
Download the Drupal Coder module (7x-2.0 version is recommended). You don't need to install or use the Drupal Coder module, it contains the Drupal Coding Standards inside.
Unpack the downloaded archive and find the coder_sniffer/Drupal subdirectory inside. You need to move the contents of this directory to <php installation folder>/CodeSniffer/Standards/Drupal. This directory must contain the ruleset.xml file and some other subdirectories.
Viewing Drupal API documentation from IntelliJ IDEA
To reach the Drupal API Documentation at https://api.drupal.org/api/drupal right from IntelliJ IDEA, select the symbol you are interested in and choose Search in Drupal API on the context menu of the selection.
Using the Drush command line tool
Drush is a command line shell and scripting interface for Drupal. With IntelliJ IDEA, you can use Drush 5.8 and higher.
On the Command Line Tool Support page, click the Add button. In the Choose Tool to Add dialog box that opens, choose Drush and specify the tool's visibility. The available options are Project (available only in the current project) and Global (available across all IntelliJ IDEA projects). Click OK.
In the Drush dialog bo that opes, specify the path to the Drush executable file. IntelliJ IDEA automatically fills in the default location, which is usually C:/ProgramData/Drush/drush.bat on Windows and /usr/bin/drush on Mac OS or Linux. If you followed the standard installation procedure, the predefined path will be correct, just click OK, whereupon IntelliJ IDEA loads command definitions automatically and returns to the Command Line Tool Support page.
In the Alias text box, specify the alias to use in calls of tool commands. Accept the default alias or edit it, if necessary.
To activate the detected command set, select the Enable check box.
To run a Drush command, choose Tools | Run Command... on the main menu or press Ctrl+Shift+X (Cmd-Shift-X on macOS).
For details about configuring and running command line tools in IntelliJ IDEA, see Using Command Line Tools.
Integration between Drupal 8 and Symfony2
IntelliJ IDEA provides close integration between Drupal, version 8 and Symfony2 which connects Symfony2 components and Drupal infrastructure. To take advantage from this integration:
Coding Assistance for Drupal8 - Symfony2 Integration
Completion for major Drupal-specific parameters in <module_name>.info.yml files that contain information about Drupal modules.
Strings suitable for use inside Drupal-specific t() function are indexed across your project and offered for completion.
Completion for relevant .yml key values in url() and other Drupal API functions, which makes search for the right value easier.
Navigation to the .yml file by pressing Ctrl+B or choosing Navigate | Go To Declaration.
Full support for service containers described in .yml files, including completion and navigation with Ctrl+B.
Support of the Twig template engine, which is now the default template engine for Drupal 8, including completion, navigation, and recognition of Drupal functions. See also Twig in Drupal 8.
icon in the gutter. 