Fix ArrayAccess and JsonSerializable return types

First round of modifications for PHP 8.1

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

3 files changed, 4 insertions, 3 deletions

diff --git a/lib/private/Accounts/Account.php b/lib/private/Accounts/Account.php
index 1e4189f2b35..540d15cd4b9 100644
--- a/lib/private/Accounts/Account.php
+++ b/lib/private/Accounts/Account.php
@@ -104,7 +104,8 @@ class Account implements IAccount {
 		return $result;
 	}
 
-	public function jsonSerialize() {
+	/** @return IAccountPropertyCollection[]|IAccountProperty[] */
+	public function jsonSerialize(): array {
 		return $this->properties;
 	}
 
diff --git a/lib/private/Accounts/AccountProperty.php b/lib/private/Accounts/AccountProperty.php
index 0e6356e9e92..4b7f2b0c04c 100644
--- a/lib/private/Accounts/AccountProperty.php
+++ b/lib/private/Accounts/AccountProperty.php
@@ -54,7 +54,7 @@ class AccountProperty implements IAccountProperty {
 		$this->verificationData = $verificationData;
 	}
 
-	public function jsonSerialize() {
+	public function jsonSerialize(): array {
 		return [
 			'name' => $this->getName(),
 			'value' => $this->getValue(),
diff --git a/lib/private/Accounts/AccountPropertyCollection.php b/lib/private/Accounts/AccountPropertyCollection.php
index 3aed76d8746..091c5734218 100644
--- a/lib/private/Accounts/AccountPropertyCollection.php
+++ b/lib/private/Accounts/AccountPropertyCollection.php
@@ -102,7 +102,7 @@ class AccountPropertyCollection implements IAccountPropertyCollection {
 		return $this;
 	}
 
-	public function jsonSerialize() {
+	public function jsonSerialize(): array {
 		return [$this->collectionName => $this->properties];
 	}