wp-debug.php

<?php

$scripts = wp_scripts();
echo '<pre>';
print_r( $scripts );
echo '</pre><hr>';

$styles = wp_styles();
echo '<pre>';
print_r( $styles );
echo '</pre><hr>';

global $wp_filter;
echo '<pre>';
var_dump( $wp_filter['wp_head'] );
echo '</pre><hr>';

global $wp_filter;
echo '<pre>';
var_dump( $wp_filter['wp_footer'] );
echo '</pre>';