Testing

gistfile1.php

<?php
add_action( 'plugins_loaded', 'my_pre_my_ostrichcized_plugins', 1 );
add_action( 'wp', 'dd_test_notice' );
add_action( 'wp', 'dd_test_warning' );
add_action( 'wp', 'dd_test_fatal' );


function dd_test_notice() {
	$error = NOT_DEFINED_CONSTANT;
}

function dd_test_warning() {
	foreach ( null as $var ) {}
}

function dd_test_fatal() {
	this_function_doesnt_exist();
}

function my_ostrichcized_plugins( $slugs ) {
	$slugs[] = 'testing-errors';
	return $slugs;
}

function my_pre_my_ostrichcized_plugins() {
	add_filter( 'ostrichcized_plugins', 'my_ostrichcized_plugins' );
}