1 files changed, 13 insertions, 4 deletions
diff --git a/cli/i18n/I18nUsageValidator.php b/cli/i18n/I18nUsageValidator.php
index 681e17326..f507fbac3 100644
--- a/cli/i18n/I18nUsageValidator.php
+++ b/cli/i18n/I18nUsageValidator.php
@@ -4,18 +4,27 @@ require_once __DIR__ . '/I18nValidatorInterface.php';
 
 class I18nUsageValidator implements I18nValidatorInterface {
 
+	/** @var array<string> */
 	private $code;
+	/** @var array<string,array<string,string>> */
 	private $reference;
+	/** @var int */
 	private $totalEntries = 0;
+	/** @var int */
 	private $failedEntries = 0;
+	/** @var string */
 	private $result = '';
 
-	public function __construct($reference, $code) {
+	/**
+	 * @param array<string,array<string,string>> $reference
+	 * @param array<string> $code
+	 */
+	public function __construct(array $reference, array $code) {
 		$this->code = $code;
 		$this->reference = $reference;
 	}
 
-	public function displayReport() {
+	public function displayReport(): string {
 		if ($this->failedEntries > $this->totalEntries) {
 			throw new \RuntimeException('The number of unused strings cannot be higher than the number of strings');
 		}
@@ -25,11 +34,11 @@ class I18nUsageValidator implements I18nValidatorInterface {
 		return sprintf('%5.1f%% of translation keys are unused.', $this->failedEntries / $this->totalEntries * 100) . PHP_EOL;
 	}
 
-	public function displayResult() {
+	public function displayResult(): string {
 		return $this->result;
 	}
 
-	public function validate() {
+	public function validate(): bool {
 		foreach ($this->reference as $file => $data) {
 			foreach ($data as $key => $value) {
 				$this->totalEntries++;