WordPress quick lookup hooks.

gistfile1.php

<?php

// Add at bottom of https://github.com/WordPress/WordPress/blob/3.8/wp-settings.php
$ip = $_SERVER['REMOTE_ADDR'];

if ( $ip == '0.0.0.0' ) {

	// Test hook function
	function test_filter_test() {
		var_dump( $_POST );

		exit;
	}

	add_action( 'template_redirect', 'test_filter_test', 1 );

	// Filters
	global $wp_filter;

	$hook = 'template_redirect';

	print '<pre>';
	print_r( $wp_filter[$hook] );
	print '</pre>';

}