Updated code formatting and PHP 7 usage

framework/grid/RadioButtonColumn.php

@@ -86,7 +86,7 @@ class RadioButtonColumn extends Column
                 $options['value'] = is_array($key) ? json_encode($key, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) : $key;
             }
         }
-        $checked = isset($options['checked']) ? $options['checked'] : false;
+        $checked = $options['checked'] ?? false;
         return Html::radio($this->name, $checked, $options);
     }
 }

framework/helpers/BaseHtml.php

@@ -147,7 +147,7 @@ class BaseHtml
         if ($name === null || $name === false) {
             return $content;
         }
-        $html = "<$name" . static::renderTagAttributes($options) . '>';
+        $html = '<' .$name . static::renderTagAttributes($options) . '>';
         return isset(static::$voidElements[strtolower($name)]) ? $html : "$html$content</$name>";
     }
 
@@ -168,7 +168,7 @@ class BaseHtml
             return '';
         }
 
-        return "<$name" . static::renderTagAttributes($options) . '>';
+        return '<' . $name . static::renderTagAttributes($options) . '>';
     }
 
     /**