PHP CS Fixer
In addition to built-in coding assistance, IntelliJ IDEA provides checking the source code through integration with the PHP CS Fixer tool, which detects coding standards problems in your code.
To use PHP CS Fixer from IntelliJ IDEA instead of command line, you need to register it in IntelliJ IDEA and configure it as a IntelliJ IDEA code inspection. Once installed and enabled in IntelliJ IDEA, the tool is available in any opened PHP file, and no additional steps are required to launch it. The on-the-fly code check is activated upon every update in the file thus making it easy to get rid of discovered problems.
Errors and warnings reported by PHP CS Fixer on-the-fly are displayed as popup messages. When the tool is run in the batch mode, the errors and warnings are displayed in the Problems tool window. Each message has the PHP CS Fixer prefix to distinguish it from IntelliJ IDEA internal inspections.
You can have predefined rules applied or define your own custom set of rules.
Install the PHP plugin
This functionality relies on the PHP plugin that should be installed and enabled in your IDE.
The plugin is available only in IntelliJ IDEA Ultimate.
Press Ctrl+Alt+S to open the IDE settings and select .
Switch to the Marketplace tab and use the search field to find the PHP plugin.
Click Install and restart the IDE if prompted.
Prerequisites
Prior to integrating PHP CS Fixer in IntelliJ IDEA, make sure the following prerequisites are met:
You are working with PHP CS Fixer version 2.8.0 and later.
The directory containing the PHP engine executable must be added to the system
path. This allows code quality tool scripts execute calls to the system-wide PHP engine.For Docker Compose-based remote interpreters, make sure to use
execmode to avoid spawning additional containers.In the Settings/Preferences dialog (Ctrl+Alt+S), go to .
On the PHP page that opens, click
next to the CLI Interpreter list. In the CLI Interpreters dialog that opens, set the Lifecycle mode for the selected interpreter to Connect to existing container ('docker-compose exec') .
Install and configure PHP CS Fixer
PHP CS Fixer scripts can be used as local scripts, the scripts associated with PHP interpreters, or scripts declared as project dependencies and installed via Composer, which is the preferable and recommended way.
Install PHP CS Fixer with Composer
Before you start, make sure Composer is installed on your machine and initialized in the current project as described in Composer dependency manager.
When you install PHP CS Fixer with Composer, IntelliJ IDEA automatically downloads the necessary scripts, registers them in the IDE, and, optionally, enables and configures the corresponding code inspection.
Inside composer.json, add the friendsofphp/php-cs-fixer dependency record to the
requireorrequire-devsection. Press Ctrl+Space to get code completion for the package name and version.Do one of the following:
Click the Install shortcut link on top of the editor panel.
If the Non-installed Composer packages inspection is enabled, IntelliJ IDEA will highlight the declared dependencies that are not currently installed. Press Alt+Enter and select whether you want to install a specific dependency or all dependencies at once.
Click 
next to the package record in the composer.json editor gutter to jump to the corresponding Settings/Preferences page and configure PHP CS Fixer manually.
Reset PHP CS Fixer configuration
After PHP CS Fixer is initially configured, further modifications in composer.json will not affect the inspection configuration. To apply newer changes, reset the PHP CS Fixer configuration.
In the Settings/Preferences dialog (Ctrl+Alt+S), navigate to .
On the Quality Tools page that opens, expand the PHP CS Fixer area and click
next to the Configuration list.In the PHP CS Fixer dialog that opens, empty the PHP CS Fixer path field.
Update the project Composer dependencies by clicking Update on top of the composer.json editor panel. See Update dependencies for details.
IntelliJ IDEA will perform the PHP CS Fixer configuration anew and thus apply the changes in composer.json.
Configure PHP CS Fixer manually
You can use the manually downloaded local PHP code quality tool scripts or scripts associated with PHP interpreters. There can be a number of local and remote PHP interpreters, the one specified on the PHP reference page of the Settings/Preferences dialog is considered Project Default. Learn more about configuring PHP interpreters in Configuring Remote PHP Interpreters or in Configuring Local PHP Interpreters.
Choose a PHP CS Fixer script to use
In the Settings/Preferences dialog (Ctrl+Alt+S), navigate to .
On the Quality Tools page that opens, expand the PHP CS Fixer area. From the Configuration list, choose the PHP CS Fixer script:
To use the script associated with a specific remote PHP interpreter, choose the name of this interpreter.
To use a local script, choose Local. In this case the local PHP CS Fixer will be executed no matter which PHP interpreter - local or remote - is used in the project. Note that there can be only one Local configuration for PHP CS Fixer because IntelliJ IDEA runs a script (php-cs-fixer.bat for Windows or php-cs-fixer for Linux and macOS) that contains a path to a PHP engine.
To use the script associated with the default project interpreter, that is, the one chosen on the PHP page of the Settings/Preferences dialog, choose By default project interpreter.
Configure a local PHP CS Fixer script
Download and install the PHP CS Fixer scripts.
To check the PHP CS Fixer installation, switch to the installation directory and run the following command:
php-cs-fixer --versionIf the tool is available, you will get a message in the following format:
PHP CS Fixer 2.13.0 Yogi's BBQ by Fabien Potencier and Dariusz RuminskiTo have code checked against your own custom coding standard, create it. Store the rules and the .php_cs or php_cs.dist file that points to them in the rulesets root directory.
Register the local PHP CS Fixer script in IntelliJ IDEA:
In the Settings/Preferences dialog (Ctrl+Alt+S), navigate to .
On the Quality Tools page that opens, expand the PHP CS Fixer area and click
next to the Configuration list.In the PHP CS Fixer dialog that opens, specify the location of the php-cs-fixer.bat or php-cs-fixer PHP CS Fixer executable in the PHP CS Fixer path field. Type the path manually or click
and select the relevant folder in the dialog that opens. To check that the specified path to php-cs-fixer.bat or php-cs-fixer ensures interaction between IntelliJ IDEA and PHP CS Fixer, that is, the tool can be launched from IntelliJ IDEA and IntelliJ IDEA will receive problem reports from it, click the Validate button. This validation is equal to running the
php-cs-fixer --versioncommand. If validation passes successfully, IntelliJ IDEA displays the information on the detected PHP CS Fixer version.
If necessary, in the Tool process timeout field, specify how long you want IntelliJ IDEA to wait for a result from PHP CS Fixer, whereupon the process is terminated to prevent excessive CPU and memory usage.
Configure a PHP CS Fixer script associated with a PHP interpreter
In the Settings/Preferences dialog (Ctrl+Alt+S), navigate to .
On the Quality Tools page that opens, expand the PHP CS Fixer area and click
next to the Configuration list. The PHP CS Fixer dialog opens showing the list of all the configured PHP CS Fixer scripts in the left-hand pane, one of them is of the type Local and others are named after the PHP interpreters with which the scripts are associated.Click
on the toolbar. In the PHP CS Fixer by Remote Interpreter dialog that opens, choose the remote PHP interpreter to use the associated script from. If the list does not contain a relevant interpreter, click and configure a remote interpreter in the CLI Interpreters dialog as described in Configuring Remote PHP Interpreters.When you click OK, IntelliJ IDEA brings you back to the PHP CS Fixer dialog where the new PHP CS Fixer configuration is added to the list and the right-hand pane shows the chosen remote PHP interpreter, the path to the PHP CS Fixer associated with it, and the advanced PHP CS Fixer options.
If necessary, in the Tool process timeout field, specify how long you want IntelliJ IDEA to wait for a result from PHP CS Fixer, whereupon the process is terminated to prevent excessive CPU and memory usage.
Configure PHP CS Fixer as an IntelliJ IDEA inspection
Configure the PHP CS Fixer inspection with Composer
You can include the information on the default and custom PHP CS Fixer rulesets inside the scripts section of composer.json. When you install or update project dependencies, the specified rulesets will be detected and the PHP CS Fixer validation inspection will be enabled automatically.
If no ruleset is specified in the scripts section of composer.json, IntelliJ IDEA will additionally check the project root to locate the ruleset with the .php_cs or .php_cs.dist default name. If the file is present, it will be automatically selected as the inspection's Custom ruleset.
In the
scriptssection of composer.json, add thephp-cs-fixerPHP CS Fixer launch command into one of the leaf elements.Provide the
--rulesargument to denote the coding standard used. For example, adding the following record will set the coding standard to PSR1:"scripts": { "php-cs-fixer": "php-cs-fixer --rules=@PSR1" }Alternatively, provide the
--configargument and the path to the ruleset file, which will set the coding standard to Custom:"scripts": { "php-cs-fixer": "php-cs-fixer --config=./.php_cs" }
Configure the PHP CS Fixer inspection manually
In the Settings/Preferences dialog (Ctrl+Alt+S), click Inspections under Editor.
On the Inspections page that opens, expand the node and select the checkbox next to PHP CS Fixer validation.
On the right-hand pane of the page, configure the PHP CS Fixer tool using the controls in the Options area:
From the Severity list, choose the severity degree for the PHP CS Fixer inspection. The selected value determines how serious the detected discrepancies will be treated by IntelliJ IDEA and presented in the inspection results.
From the Scope list, choose the scope to limit the inspection application to.
To allow risky rules, that is, the rules that can change code behavior, select the Allow risky rules for built-in rulesets checkbox. By default, risky rules are not allowed.
Appoint the coding standard to apply.
To use one of the predefined coding standards, select it the Coding standard list, appoint the coding style to check your code against. The list contains all the coding standards declared inside the main php-cs-fixer directory structure.
To have your code checked against your own previously defined coding standard, choose Custom. Click Browse
and in the Custom Coding Standard dialog that opens, specify the path to the .php_cs or .php_cs.dist file for your own coding standard in the Path to ruleset field. Type the path manually or click Browse and choose the relevant folder in the dialog that opens.
Share a custom coding style with the team
Put the root directory of your coding standard under the project root.
Make sure that a project profile is selected at the top of the Inspections page. Such profiles are saved in a particular project's .idea directory (for example, $PROJECT_DIR$/.idea/inspectionProfiles). See Configure profiles for details.
On the Version Control page of the Settings/Preferences dialog, make sure that the .idea directory is put under version control.
Run PHP CS Fixer in the batch mode
From the main menu, select .
Select the inspection profile from the list, or click
to configure a new profile in the Inspections dialog that opens. You can also click to check, which fixes will be applied and make sure that the PHP CS Fixer validation inspection is enabled.View the inspection results in the Problems tool window. Errors and warnings reported by PHP CS Fixer are prefixed with
PHP CS Fixerto distinguish them from IntelliJ IDEA internal inspections.
Exclude files from PHP CS Fixer inspection
When waiting for PHP CS Fixer response exceeds the limit specified in the Tool process timeout field in the PHP CS Fixer dialog, IntelliJ IDEA suggests adding the file to the ignore list.
In the Settings/Preferences dialog (Ctrl+Alt+S), navigate to .
On the Quality Tools page that opens, expand the PHP CS Fixer area and click the Show ignored files link.
To add a file, click
and locate the desired file in the dialog that opens.To delete a file from the list and have PHP CS Fixer process it again, select the file and click
.To remove all the files from the list, click
.