A few additional PHPStan rules (#5388)

A subset of
https://github.com/phpstan/phpstan-strict-rules

1 files changed, 1 insertions, 1 deletions

diff --git a/cli/manipulate.translation.php b/cli/manipulate.translation.php
index 947739384..4ef7101a3 100755
--- a/cli/manipulate.translation.php
+++ b/cli/manipulate.translation.php
@@ -28,7 +28,7 @@ switch ($options['a']) {
 			$i18nData->addKey($options['k'], $options['v']);
 		} elseif (array_key_exists('l', $options)) {
 			$reference = null;
-			if (array_key_exists('o', $options) && is_string($options['o'])) {
+			if (array_key_exists('o', $options)) {
 				$reference = $options['o'];
 			}
 			$i18nData->addLanguage($options['l'], $reference);