passing variables inside a widget add_action

Question

Here's my code inside a widget class:

function widget($args, $instance) {

add_action('wp_footer', function () { echo $instance['title'] });

}

It doesn't output $instance['title']. I tried passing the $instance parameter in the function, and even tried global $instance;, but neither worked.

Answer 1

Use the use keyword:

$title = $instance['title'];

add_action( 'wp_footer', function() use ( $title ) {
    echo  $title; 
});