function Renderer::renderPlaceholder

Overrides RendererInterface::renderPlaceholder

File

core/lib/Drupal/Core/Render/Renderer.php, line 167

Class

Renderer

Turns a render array into an HTML string.

Namespace

Code

public function renderPlaceholder($placeholder, array $elements) {
    // Get the render array for the given placeholder
    $placeholder_elements = $elements['#attached']['placeholders'][$placeholder];
    // Prevent the render array from being auto-placeholdered again.
    $placeholder_elements['#create_placeholder'] = FALSE;
    // Render the placeholder into markup.
    $markup = $this->renderPlain($placeholder_elements);
    // Replace the placeholder with its rendered markup, and merge its
    // bubbleable metadata with the main elements'.
    $elements['#markup'] = Markup::create(str_replace($placeholder, $markup, $elements['#markup']));
    $elements = $this->mergeBubbleableMetadata($elements, $placeholder_elements);
    // Remove the placeholder that we've just rendered.
    unset($elements['#attached']['placeholders'][$placeholder]);
    return $elements;
}