PHPStan level 9

composer.json

@@ -18,14 +18,15 @@
         "wp-cli/entity-command": "^1.3 || ^2",
         "wp-cli/eval-command": "^2.0",
         "wp-cli/server-command": "^2.0",
-        "wp-cli/wp-cli-tests": "^4"
+        "wp-cli/wp-cli-tests": "dev-add/phpstan-enhancements"
     },
     "config": {
         "process-timeout": 7200,
         "sort-packages": true,
         "allow-plugins": {
             "dealerdirect/phpcodesniffer-composer-installer": true,
-            "johnpbloch/wordpress-core-installer": true
+            "johnpbloch/wordpress-core-installer": true,
+            "phpstan/extension-installer": true
         },
         "lock": false
     },
@@ -62,12 +63,14 @@
         "behat-rerun": "rerun-behat-tests",
         "lint": "run-linter-tests",
         "phpcs": "run-phpcs-tests",
+        "phpstan": "run-phpstan-tests",
         "phpcbf": "run-phpcbf-cleanup",
         "phpunit": "run-php-unit-tests",
         "prepare-tests": "install-package-tests",
         "test": [
             "@lint",
             "@phpcs",
+            "@phpstan",
             "@phpunit",
             "@behat"
         ]

features/cron-event.feature

@@ -81,14 +81,6 @@ Feature: Manage WP Cron events
       Error: No events found for hook 'wp_cli_test_event'.
       """
 
-  @less-than-wp-4.9.0
-  Scenario: Unschedule cron event for WP < 4.9.0, wp_unschedule_hook was not included
-    When I try `wp cron event unschedule wp_cli_test_event_1`
-    Then STDERR should be:
-      """
-      Error: Unscheduling events is only supported from WordPress 4.9.0 onwards.
-      """
-
   Scenario: Run cron event with a registered shutdown function
     Given a wp-content/mu-plugins/setup_shutdown_function.php file:
       """

phpstan.neon.dist

@@ -0,0 +1,19 @@
+parameters:
+  level: 9
+  paths:
+    - src
+    - cron-command.php
+  scanDirectories:
+    - vendor/wp-cli/wp-cli/php
+    - vendor/wp-cli/wp-cli-tests
+  scanFiles:
+    - vendor/php-stubs/wordpress-stubs/wordpress-stubs.php
+  treatPhpDocTypesAsCertain: false
+  dynamicConstantNames:
+  	- WP_DEBUG
+  	- WP_DEBUG_LOG
+  	- WP_DEBUG_DISPLAY
+  ignoreErrors:
+    - identifier: missingType.iterableValue
+    - identifier: missingType.parameter
+    - identifier: missingType.return

src/Cron_Command.php

@@ -65,7 +65,6 @@ public function test() {
 	 */
 	protected static function get_cron_spawn() {
 
-		$sslverify     = \WP_CLI\Utils\wp_version_compare( 4.0, '<' );
 		$doing_wp_cron = sprintf( '%.22F', microtime( true ) );
 
 		$cron_request_array = array(
@@ -75,7 +74,7 @@ protected static function get_cron_spawn() {
 				'timeout'   => 3,
 				'blocking'  => true,
 				// phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- Calling native WordPress hook.
-				'sslverify' => apply_filters( 'https_local_ssl_verify', $sslverify ),
+				'sslverify' => apply_filters( 'https_local_ssl_verify', false ),
 			),
 		);
 

src/Cron_Event_Command.php

@@ -28,14 +28,19 @@
  * @package wp-cli
  */
 class Cron_Event_Command extends WP_CLI_Command {
-
+	/**
+	 * @var string[]
+	 */
 	private $fields = array(
 		'hook',
 		'next_run_gmt',
 		'next_run_relative',
 		'recurrence',
 	);
 
+	/**
+	 * @var string
+	 */
 	private static $time_format = 'Y-m-d H:i:s';
 
 	/**
@@ -160,9 +165,10 @@
 			WP_CLI::warning( 'Numeric keys should be used for the hook arguments.' );
 		}
 
-		$hook       = $args[0];
+		$hook = $args[0];
+
 		$next_run   = Utils\get_flag_value( $args, 1, 'now' );
 		$recurrence = Utils\get_flag_value( $args, 2, false );
 
 		if ( empty( $next_run ) ) {
 			$timestamp = time();
@@ -263,10 +269,6 @@
 
 		list( $hook ) = $args;
 
-		if ( Utils\wp_version_compare( '4.9.0', '<' ) ) {
-			WP_CLI::error( 'Unscheduling events is only supported from WordPress 4.9.0 onwards.' );
-		}
-
 		$unscheduled = wp_unschedule_hook( $hook );
 
 		if ( empty( $unscheduled ) ) {
@@ -457,6 +459,10 @@
 	protected static function get_selected_cron_events( $args, $assoc_args ) {
 		$due_now = Utils\get_flag_value( $assoc_args, 'due-now' );
 		$all     = Utils\get_flag_value( $assoc_args, 'all' );
+
+		/**
+		 * @var string $exclude
+		 */
 		$exclude = Utils\get_flag_value( $assoc_args, 'exclude' );
 
 		if ( empty( $args ) && ! $due_now && ! $all ) {
@@ -549,11 +555,18 @@
 			array( 1, 'second' ),
 		);
 
+		$name    = 'second';
+		$count   = 0;
+		$seconds = 1;
+
 		// we only want to output two chunks of time here, eg:
 		// x years, xx months
 		// x days, xx hours
 		// so there's only two bits of calculation below:
 
+		$i = 0;
+		$j = 0;
+
 		// step one: the first chunk
 		for ( $i = 0, $j = count( $chunks ); $i < $j; $i++ ) {
 			$seconds = $chunks[ $i ][0];

src/Cron_Schedule_Command.php

@@ -16,7 +16,9 @@
  *     +------------+-------------+----------+
  */
 class Cron_Schedule_Command extends WP_CLI_Command {
-
+	/**
+	 * @var string[]
+	 */
 	private $fields = array(
 		'name',
 		'display',