Add function for ensuring all input in an array is strings

src/MD_STD_IN.php

@@ -131,6 +131,27 @@ final class MD_STD_IN {
 
     }
 
+    /**
+     * Validates an input array for all entries being strings. Unsets empty values.
+     * This is especially useful for parsed JSON.
+     *
+     * @param array<mixed> $inputs Input array.
+     *
+     * @return array<string>
+     */
+    public static function sanitize_text_array(array $inputs):array {
+
+        $output = [];
+
+        foreach ($inputs as $key => $input) {
+            if (empty($input)) continue;
+            $output[$key] = self::sanitize_text($input);
+        }
+
+        return $output;
+
+    }
+
     /**
      * Retrieves HTTP input texts from GET or POST variables, whatever is provided.
      * If neither is given, returns a provided default.