Cake\View\StringTemplate::formatAttributes PHP Method

    public function formatAttributes($options, $exclude = null)
    {
        $insertBefore = ' ';
        $options = (array) $options + ['escape' => true];
        if (!is_array($exclude)) {
            $exclude = [];
        }
        $exclude = ['escape' => true, 'idPrefix' => true, 'templateVars' => true] + array_flip($exclude);
        $escape = $options['escape'];
        $attributes = [];
        foreach ($options as $key => $value) {
            if (!isset($exclude[$key]) && $value !== false && $value !== null) {
                $attributes[] = $this->_formatAttribute($key, $value, $escape);
            }
        }
        $out = trim(implode(' ', $attributes));
        return $out ? $insertBefore . $out : '';
    }

 /**
  * Render a text widget or other simple widget like email/tel/number.
  *
  * This method accepts a number of keys:
  *
  * - `name` The name attribute.
  * - `val` The value attribute.
  * - `escape` Set to false to disable escaping on all attributes.
  *
  * Any other keys provided in $data will be converted into HTML attributes.
  *
  * @param array $data The data to build an input with.
  * @param \Cake\View\Form\ContextInterface $context The current form context.
  * @return string
  */
 public function render(array $data, ContextInterface $context)
 {
     $data += ['name' => '', 'val' => null, 'type' => 'text', 'escape' => true];
     $data['value'] = $data['val'];
     unset($data['val']);
     return $this->_templates->format('input', ['name' => $data['name'], 'type' => $data['type'], 'attrs' => $this->_templates->formatAttributes($data, ['name', 'type'])]);
 }