WordPress - show registered filters for hooks

wp-show-registered-filters.php

<?php

function show_registered_filters( $hook = '' ) {
    global $wp_filter;

    if( empty( $hook ) || !isset( $wp_filter[$hook] ) )
        return;

    echo '<pre>';
    
    foreach ( $wp_filter[$hook]->callbacks as $item ) {
        foreach ( $item as $item2 ) {
            var_dump( $item2['function'][0] );
            var_dump( $item2['function'][1] );
            echo "\n\n";
        }
    }

    echo '</pre>';
}

wp_die(var_dump(show_registered_filters( 'tec_cart_item_data_variation' )));

This function needs to be called after the output buffer starts, in other words, the best place would be a theme file.