Show WordPress filters

show_wp_filters

/* Simple function to show existing WordPress filters */
function show_filter($filter_key='') {
	if (empty($filter_key)) return false;
	
	global $wp_filter;
	if (isset($wp_filter[$filter_key])) {
		foreach($wp_filter[$filter_key] as $priority => $filter_sets) {
			echo "=== Priority [{$priority}] ===<br />";
			foreach($filter_sets as $filter_set_key => $filter_set_data) {
				echo $filter_set_key."<br />";
			}
			echo "<br />";
		}
	}
}

/* Example show the filters for 'the_content' */ 
show_filter('the_content');

/* Will output something like -

=== Priority [8] ===
407d309a6597f09e856501cefc99ae6arun_shortcode
407d309a6597f09e856501cefc99ae6aautoembed

=== Priority [10] ===
wptexturize
convert_smilies
convert_chars
wpautop
shortcode_unautop
prepend_attachment

=== Priority [11] ===
capital_P_dangit
do_shortcode

*/